PROJECT FOR
MODERNIZATION AND TECHNICAL IMPROVEMENTS TO THE CONCHOS RIVER
IRRIGATION
DISTRICTS
BECC
CERTIFICATION DOCUMENT
SEPTEMBER 2002
PROJECT FOR MODERNIZATION AND
TECHNICAL IMPROVEMENTS TO THE CONCHOS RIVER IRRIGATION DISTRICTS
BECC PROJECT CERTIFICATION DOCUMENT
C O N T E N T S
Chapter 1.- General
Criteria
Chapter 2.- Human Health and Environment
Chapter 3.- Technical Feasibility
Chapter 4.- Financial Feasibility and Project Management
Chapter 5.- Community Participation
Chapter 6.- Sustainable Development
Appendix.- Baseline
Conditions
Attachments *
1.a.1. |
Decrees
and agreements establishing Irrigation Districts of Delicias, Bajo Río Conchos
y Río Florido. |
1.a.2. |
Concessions
for the exploitation and use of national water by the Irrigation Districts of
Delicias, Bajo Río Conchos Río Florido. |
1.a.3. |
Summary
of Feasibility Study for Improvements Delicias Irrigattion District 005
prepared by CNAs Department of Planning Office of Studies for Comprehensive
Water Development. |
1.b.1. |
a)
Figures of the proyect zones 1.-
Irrigation District 005 Delicias 2.-
Irrigation District 090 Bajo Río Conchos 3.-
Irrigation District No. 103 Río Florido b)
Project Plans 1.-
General Plan of Irrigation District 005Delicias 2.-
General Plan of Irrigation District
090 Bajo Río Conchos 3.-
General Plan of Irrigation District 103Río Florido |
1.c.1. |
Action program
for improving efficiencies in the Irrigation Districts of Río Conchos. CNA,
Chihuahua. |
1.c.2. |
Demographic
data and data of relevant services in the municipalities of Ojinaga,
Delicias, Jiménez, y Camargo. |
1.d.1. |
IBWC
Minute 308. |
2.1. |
Current
information on Rio Grande. CNA General Operations Directorate (April 2002) |
2.2 |
Chapter
of the Quality of Water of the Feasibility Study. Strategic Vision for the Provisión of Water in the Cities and Rivers of the Northern
Border, prepared by the CNA. |
2.3. |
Chapter
3 of the Strategic Plan, State Of The Rio Grande And The Environment Of The Border Region, Fiscal years 2003 - 2007 Volume 3. |
2.4. |
Table of
Water Quality in the Rio Grande Basin |
2.a.1. |
Principal
causes of Death, 2000 Chihuahua INEGI/SSA |
2.c.1. |
Rules of
the General Law of the Environment Equilibrium and Environmental Protection |
2.c.2. |
1.- Letter prepared by SEMARNAT
stating that no Environmental Asessment is required in accordance with Mexican
Law. 2.- Letter prepared by National
Institute of Anthropology and Archeology statint that is no impact on
historical sites. 3.- Approvals by EPA and SEMARNAT
for certification of the project. 4.-
Letter authorizing investments for the project by the Secretariat for Housing
and Public Credit. |
3.a.1. |
Water
saving analyses for the Irrigation Districts of the Rio Conchos. |
3.a.2. |
Project
technical specifications |
3.a.3. |
Water
saving volume estimate. |
3.b.1. |
Irrigation
District Regulations for Delicias, Bajo Río Conchos y Río Florido. |
4.c.1. |
Organizational
charts of the Irrigation Districts of Delicias, Bajo Río Conchos y Río
Florido. |
5.a.1. |
Final
Report of the Community Participation Program. |
6 |
Agreements
for construction of modernization and technical improvements works in order
to saving water in the Río Conchos River Basin signed by National Water
Commission, Chihuahua State Government and the Users of the Delicias
Irrigation Districts Moduls. |
*These documents are available for
review only at the BECC offices.
BECC PROJECT CERTIFICATION DOCUMENT
Chapter 1.- General Criteria
The project falls within one
of BECCs priority areas, as it is related with the rational use of water and
water conservation; it is targeted to improving the use of water within the 005
Delicias Irrigation District (ID) found in the Conchos River watershed. The
purpose is to make sustainable use of water resources by implementing actions
to improve water use and increase runoff to the Rio Grande, thus achieving a
transboundary environmental benefit.
Irrigation districts found
within the Rio Grande watershed use up most (approximately 85%) of the water
withdrawn from the eight reservoirs that supply them. Thus, the most
significant projects being planned by the governments of Mexico and the United
States to achieve sustainable use of water are related to the modernization of
such irrigation districts.
Of the three districts, Delicias, with a surface area
of 88,525.60 hectares, covers 81% of the total area. This area indicates use of 83% of the volume of water, and thus,
has the major water savings potential in the Rio Conchos.
As a result, although the present document provides data related to the
rehabilitation of the three existing Districts in the Rio Conchos basin, it
should be noted that the project to be certified relates exclusively to the
District of Delicias, and should not in
any way be construed to be sufficient for certification of the other
districts.
The project highlights the need to rehabilitate and upgrade the water
distribution infrastructure, as well as the drainage and connections in the
Delicias, Lower Rio Conchos and Rio Florido districts, all of them found in the
watershed of the Conchos River, a tributary to the Rio Grande. In addition, the
project proposes land grading to achieve significant water savings. The
proposed tasks are summarized below:
Proposed Modernization and Technical Improvements
Lining and structures main canal |
Lining and structures lateral canals |
Lining and structures minor and interparcel lines |
Low-pressure and gated piping |
Land grading |
Interparcel drainage |
Pumping stations, low pressure irrigation and
grading |
The Delicias District was created by presidential decree and is
considered of public interest, given the need to support farming and promote
the countrys agricultural development. Such decrees are included in Attachment
1.a.1.
Water rights held by the irrigation districts amount to 1,321 million
cubic meters per year, of which 86% correspond to surface water and the
remaining amount to groundwater. Of this flow, the 005 Delicias ID has 83% of
the total amount of surface water and 100% of the groundwater; the 090 Lower
Rio Conchos ID has 8% of all surface water, and 103 Rio Florido ID has 9% of
all surface water, as summarized in the following table and described in detail
in Attachment 1.a.2., which also includes copies of the allotment
deeds.
Irrigation District |
Water Allotment (m3/Year) |
||
Surface water |
Groundwater |
Total |
|
005 Delicias |
941,597,000 |
189,319,000 |
1,130,916,000 |
090 Lower Río Conchos |
84,990,110 |
---------------- |
84,990,110 |
103 Río
Florido |
105,097,300 |
---------------- |
105,097,300 |
Grand
total |
1,131,684,410 |
189,319,000 |
1,321,003,410 |
Prior to the project, the CNAs Department of Plannings Office of Studies for Comprehensive Water Development prepared a national feasibility study to upgrade the IDs. A summary of this included in Attachment 1.a.3
The project is located in 005 Delicias ID in the Conchos River basin.
See Attachments 1.b.1. and 1.b.2.
The
Conchos River is a tributary of the Rio Grande and is a part its river basin.
The Lower Rio Conchos irrigation district is found inside the 100-kilometer
border area. The other two districts, Delicias and Rio Florido, are located
outside the 100-kilometer stretch, but within the 300 km area south of the
border; thus, authorization is required from the Mexican Secretary of the
Environment and Natural Resources (SEMARNAT) and the U.S. Environmental
Protection Agency (EPA) to issue the projects certification, considering that
the project has transboundary effects, since the amount of water saved will
reach the Rio Grande, thus increasing the flow and obtaining an environmental
benefit for this international body of water (see Figure 1, Rio Grande Basin).
The irrigation district of Delicias, being the purpose for the
certification document, is located in the south-central part of the State of
Chihuahua outside of the 100-kilometer stretch of the Rio Grande but within the
Rio Grande river basin, as noted above.
The project includes areas along the Conchos River, which runs from
south to north in the State of Chihuahua and part of the State of Durango,
primarily in the municipalities of , Delicias and Jimenez. The Delicias ID
includes almost 70,000 hectares; however, the projects influence area goes
beyond the Conchos River watershed, since it directly impacts the Rio Grande
watershed.
Major runoffs in the Conchos River watershed include, in addition to the Conchos itself, the San Pedro, Chuviscar and Florido rivers. In addition, the San Gabriel, Pico del Aguila, La Boquilla, Francisco I. Madero and Luis L. Leon reservoirs are located within this basin (see Figure 2, Conchos River Watershed).
Figure 2.- Conchos River Watershed and Location of
Irrigation Districts and Reservoirs
The following table shows the irrigation districts major features.
1). Project Description.
The problems related to the current level of water exploitation need to be corrected in order to sustain the rational development of the area; in fact, the governments of Mexico and the United States are determined to achieve this. An important component is the proposal contained in Minute 308 of the International Boundary and Water Commission, which provides the expectation for the quantification of the waters conserved and measures to ensure their conveyance to the Rio Grande.
FEATURES OF CONCHOS RIVER IRRIGATION DISTRICTS (*) |
|||||||
AREA (ha) |
No. |
Conveyance Distribution |
Drainage |
||||
PHYSICAL |
IRRIGATION |
Users |
Canal type |
Length (km) |
Lining |
Type |
Length (km) |
|
|||||||
DR-005 DELICIAS |
|||||||
|
|
|
Lateral or Main |
252.30 |
Concrete |
Main ditch by module |
322.53 |
|
|
|
|
1.82 |
Piped |
|
|
|
|
|
|
250.02 |
Dirt |
Branch |
|
|
|
|
Sublateral |
227.60 |
Concrete |
|
281.59 |
|
|
|
|
309.73 |
Dirt |
Sec. branch |
|
|
|
|
Branches |
87.80 |
Concrete |
|
100.74 |
|
|
|
|
98.82 |
Dirt |
|
|
|
|
|
Secondary branches |
88.97 |
Concrete |
|
88.38 |
|
|
|
|
21.33 |
Dirt |
|
|
|
|
|
|
|
|
|
|
88,525.60 |
79,792.16 |
9,375.00 |
|
1,332.06 |
|
|
847.90 |
DR-103
RÍO FLORIDO |
|||||||
|
|
|
MCRM |
60.73 |
Concrete |
Main drains |
56.39 |
|
|
|
MCLM |
64.18 |
Concrete |
Secondary |
2.70 |
|
|
|
Secondary C. |
98.27 |
Concrete |
|
|
|
|
|
Secondary C. |
9.00 |
Dirt |
|
|
|
|
|
|
|
|
|
|
8,928.08 |
8,623.48 |
1,325.00 |
|
232.18 |
|
|
59.09 |
DR-090 LOWER RÍO CONCHOS |
|||||||
|
|
|
Main gravity |
80.20 |
Concrete |
Main gravity |
81.37 |
|
|
|
|
3.36 |
Dirt |
Branch |
4.50 |
|
|
|
Lateral |
61.01 |
Concrete |
Main pumping |
30.58 |
|
|
|
Sub-lateral |
2.75 |
Concrete |
Branch |
26.51 |
|
|
|
Main pumping |
36.88 |
Concrete |
Sec. branch |
9.13 |
|
|
|
Lateral |
36.10 |
Concrete |
|
|
|
|
|
|
|
|
|
|
11,634.39 |
10,826.15 |
1,468.00 |
|
220.30 |
|
|
152.08 |
(*) Information provided by the
Action Plan for Rehabilitation and Modernization of Irrigation Districts by
Module. Rio Grande Regional Office, CNA..
The execution of the proposed project, supported by the implementation
of relevant operating policies, will
consolidate and increase the available water flow downstream from the Conchos
River, and will create an environmentally improved system that should be
preserved and expanded as part of a regional planning framework.
In addition to improving the use of water in the different irrigation
districts and enhancing land productivity, the water saved by the conservation
measures will be conveyed to the Rio Grande, thus providing beneficial
transboundary impacts.
The
Project for Modernization and Technical Improvements to the Delicias Irrigation
District is estimated to provide savings of 370 millions of m3 by
year of water by increasing the overall efficiency in the use of irrigation
water. The project proposes significant actions that include:
-
Canal lining and upgrades.
-
Build, install and rehabilitate
control and metering structures in the canals.
-
Rehabilitate roads and drains.
-
Install modern irrigation systems to
improve water use in each parcel.
-
Land grading.
-
Install interparcel drainage systems
to recover salinized soils and/or soil
affected by shallow water tables.
-
Promote a water culture among users.
-
Train utility officials and
technical staff.
-
Establish and maintain updated water
metering and agriculture information systems.
The cost
of proposed structural actions for the Delicias Irrigation District is expected
to be 1,436 million pesos, which represents an average cost of $16,296 /ha.
Expected water savings resulting from the proposed actions may reach 370
million m3 by year, considering 1,293 million 3 of
available dam water.
Major
features of the proposed actions include:
Lining of
structures, main canals, lateral canals, minor and interparcel lines, consists
of covering dirt canals with concrete, upgrading control structures (checks)
and building or installing metering structures to reduce leaking and operating
losses and deliver metered water to users.
The
purpose of installing low-pressure and gated piping is to use water loads
present in the canals, mains and laterals, to supply water to minor,
interparcel and parcel lines with low-pressure pipes and to irrigate using
gated pipes, thus increasing conveyance efficiency and reducing the effort
required for water conservation.
Land
grading consists of providing a uniform slope and preventing non-irrigated
areas, making effective use of irrigation water, etc.
Parcel
drainage consists of providing parcels with a natural outlet for excess
irrigation water and preventing flooding, alleviating the problems of soil
salinization and elevated water tables.
Water
pumping and the installation of high and low pressure lines consists of
replacing water distribution lines in the canals and gravity irrigation
(furrows and melgas) for high and low pressure piping and the use of
micro-sprinkling, sprinkling, or drip irrigation in profitable crops (fruits,
vegetables, and alfalfa) to reduce water losses.
The proposed project considers the following coverage:
PROJECT COVERAGE |
|||||
Type of Users in Sector |
Sector Area (ha) |
||||
Community |
Private |
Total |
Community |
Private |
Total |
5,900 |
5,975 |
11,875 |
32,194 |
61,998 |
94,192 |
The
following outcomes are expected:
PROJECT OUTCOMES |
|
Efficiency (%) |
|
Current |
Future |
33.23 |
53.47 |
The project proposes the following investments:
INVESTMENT PROGRAM SUMMARY
|
||
Activity |
Unit |
Amount |
Investments |
$/ha |
16,296 |
Average
harvest area |
ha |
94,192 |
Average
available flow* |
Mm3 |
1,044 |
Reclaimed
flow |
Mm3 |
396 |
Cost of
reclaimed flow |
$/m3 |
3.88 |
*based
on the average use during 1996, 1997 and 1998 |
2). Timeline for Project Tasks
The
project is expected to be completed in a 4-year period. The following table
shows the expected progress by year. See Attachment 1.c.1.
PROJECT INVESTMENT SCHEDULE |
|||||||
Item |
Unit |
Qty. |
Cost in thousands of pesos |
||||
Total |
Year 1 |
Year 2 |
Year 3 |
Year 4 |
|||
Repair slabs and structures,
replace lining joint asphalt seal in main canal and distribution lines |
KM |
135 |
27,113 |
20,551 |
6,562 |
- |
- |
Lining of main canal in Module I
Ojinaga farmland, from km 0+000 to km 3+360 |
KM |
3.4 |
7,660 |
3,511 |
3,221 |
928 |
- |
Rehabilitate and upgrade
interparcel lines, Modules 1, 2, 3, 4 and 5 Lower Rio Conchos |
KM |
23.6 |
10,602 |
- |
10,602 |
- |
- |
Rehabilitate and upgrade
distribution lines in irrigation units |
KM |
75.0 |
58,655 |
- |
46,002 |
12,653 |
- |
Rehabilitate, upgrade and install
metering and gauging structures and devices in control points |
EA. |
56.0 |
2,750 |
2,075 |
675 |
- |
- |
Rehabilitate San Antonio
diversion dam |
EA. |
1.0 |
1,500 |
487 |
1,013 |
- |
- |
Lining and/or piping lateral and
sublateral canals, and supply and install low-pressure irrigation systems
with gated piping |
KM |
718.8 |
339,034 |
119,667 |
120,235 |
43,481 |
55,651 |
Low-pressure irrigation systems
with gated piping |
HA |
17,136.0 |
245,331 |
87,781 |
76,839 |
35,401 |
45,309 |
Agricultural land grading and
leveling |
HA |
26,091.0 |
89,525 |
29,217 |
34,326 |
12,912 |
13,070 |
Provide power for MCRM and MCLM in
Module 2, Chihuahua unit. |
KM |
40.0 |
7,000 |
2,272 |
4,728 |
- |
- |
Rehabilitate electromechanic
system in El Paradero, Santa Teresa, El Mezquite and Llano de Dolores
pumping stations |
EA. |
4.0 |
3,280 |
- |
2,315 |
965 |
- |
Metering and gauging devices in
headworks, control points, and delivery to Conchos and San Pedro main canals |
LOT |
1.0 |
6,000 |
6,000 |
- |
- |
- |
Wells and high pressure lines (*) |
HA |
17,136.0 |
377,430 |
135,046 |
118,214 |
54,463 |
69,706 |
Pumping stations, low-pressure
irrigation |
HA |
8,569.0 |
150,971 |
54,018 |
47,285 |
21,785 |
27,882 |
Wells and low-pressure lines (*) |
HA |
5,998.0 |
89,167 |
31,904 |
27,928 |
12,867 |
16,468 |
Recovery of salinized soils by
installing parcel drainage in Modules 4 and 5 |
HA |
500.0 |
5,000 |
- |
5,000 |
- |
- |
Projects and supervision |
|
|
87,284 |
36,432 |
25,910 |
11,332 |
13,610 |
GRAND TOTAL |
|
|
1,508,303 |
528,962 |
530,855 |
206,786 |
241,697 |
(*)
Actions involving water wells have not been included in water conservation
estimations.
3). Description of the Community
The project will benefit 180,000 residents who use the irrigation
system, as well as the residents of cities located within the three irrigation
districts: Delicias, Lower Rio Conchos and Rio Florido. This population is
found primarily in the municipalities of Ojinaga, Delicias, Jimenez and
Camargo. Attachment 1.c.2. includes the most relevant demographic and
service data.
4). Project Alternatives
Various alternatives were reviewed to improve water use in the districts:
-
Lining up or piping canals and
interparcel sprinklers.
-
Rehabilitating, building and/or
purchasing control and metering structures.
-
Resurfacing roads.
-
Upgrading irrigation systems and
grading agricultural land to improve irrigation.
-
Installing parcel drainage.
-
Purchasing machinery.
-
Establishing a permanent training
program for module staff, and develop campaigns to promote a water culture
among users.
-
Establishing information systems to
obtain updated information regarding water metering and agricultural data.
Once the impacts and costs of the proposed actions were reviewed, a
conclusion was made to implement a combination of actions in each district, to
make the best possible use of resources needed for their development and
maximize the potential benefits.
Results expected for each district appear in the table below
- Irrigation District 005, Delicias.
PROJECT INVESTMENT SCHEDULE FOR IRRIGATION DISTRICT
005 DELICIAS |
|||||||
Item |
Unit |
Qty. |
Amount in thousands of pesos |
||||
Total |
Year 1 |
Year 2 |
Year 3 |
Year 4 |
|||
REPAIR
LINING SLABS IN CONCHOS MAIN CANAL FROM KM 6+980 TO KM 19+980 |
KM |
3.0 |
10,000 |
10,000 |
|
|
|
METERING
AND GAUGING DEVICES IN HEADWORKS, CONTROL POINTS, AND DELIVERY TO CONCHOS AND
SAN PEDRO MAIN CANALS |
LOT |
1.0 |
6,000 |
6,000 |
|
|
|
LINE
AND/OR PIPE LATERAL AND SUBLATERAL CANALS |
KM |
601.6 |
301,324 |
107,815 |
94,377 |
43,481 |
55,651 |
LOW-PRESSURE
IRRIGATION SYSTEMS WITH GATED PIPING |
HA |
17,136.0 |
245,331 |
87,781 |
76,839 |
35,401 |
45,309 |
AGRICULTURAL
LAND GRADING AND LEVELING |
HA |
21,421.0 |
70,769 |
25,321 |
22,165 |
10,212 |
13,070 |
WELLS AND
HIGH PRESSURE LINES (*) |
HA |
17,136.0 |
377,430 |
135,046 |
118,214 |
54,463 |
69,706 |
PUMPING STATIONS, LOW-PRESSURE
IRRIGATION |
HA |
8,569.0 |
150,971 |
54,018 |
47,285 |
21,785 |
27,882 |
WELLS AND LOW-PRESSURE LINES (*) |
HA |
5,998.0 |
89,167 |
31,904 |
27,928 |
12,867 |
16,468 |
PROJECTS AND SUPERVISION |
|
|
76,807 |
29,375 |
23,172 |
10,650 |
13,610 |
|
|
|
|
|
|
|
|
GRAND TOTAL |
|
|
1,327,799 |
487,261 |
409,980 |
188,859 |
241,697 |
(*)Actions involving water wells have not been included in water
conservation estimations.
The project considers the following coverage:
PROJECT COVERAGE |
|||||
Type of Users in Sector |
Sector Area (ha) |
||||
Community |
Private |
Total |
Community |
Private |
Total |
4,255 |
4,485 |
8,740 |
22,717 |
52,483 |
75,200 |
The
following outcomes are expected by the project:
PROJECT OUTCOMES |
|
Efficiency (%) |
|
Current |
Future |
33.0 |
55.0 |
The project proposes the following investments:
INVESTMENT PROGRAM SUMMARY
|
||
Activity |
Unit |
Amount |
Investments |
$/ha |
18,085 |
Average
harvest area |
ha |
75,200 |
Average
available flow* |
Mm3 |
857 |
Reclaimed
flow |
Mm3 |
343 |
Cost of reclaimed
flow |
$/m3 |
3.97 |
*based
on average use in 1996, 1997 and 1998 |
-
Irrigation District 090, Lower Rio Conchos.
PROJECT INVESTMENT SCHEDULE FOR IRRIGATION DISTRICT 090 LOWER RÍO
CONCHOS |
|||||||
Item |
Unit |
Quantity |
Amount in thousands of pesos |
||||
Total |
Year 1 |
Year 2 |
Year 3 |
Year 4 |
|||
REHABILITATE SLABS AND REPLACE
SEAL IN MAIN AND DISTRIBUTION LINE JOINTS, IN MODULES 1, 2, 3, 4 AND 5 |
KM |
7.4 |
10,123 |
8,283 |
1,841 |
|
|
LINE MAIN CANAL, MODULE I, OJINAGA
PARCEL KM 0+000 TO KM 3+360 |
KM |
3.4 |
7,660 |
3,511 |
3,221 |
928 |
|
REHABILITATE AND UPGRADE
INTERPARCEL LINES, MODULES 1, 2, 3, 4 AND 5 |
KM |
23.6 |
10,603 |
|
10,603 |
|
|
GRADE AGRICULTURAL AREAS TO IMPROVE
PARCEL IRRIGATION, MODULES 1, 2, 3, 4 AND 5 |
HA |
1,500.0 |
6,756 |
|
4,056 |
2,700 |
|
REHABILITATE, UPGRADE AND INSTALL
DISTRIBUTION, CONTROL AND METERING STRUCTURES IN MODULES 1, 2, 3, 4 AND 5 |
EA. |
50.0 |
1,750 |
1,750 |
|
|
|
REHABILITATE ELECTROMECHANIC
SYSTEM IN EL PARADERO, SANTA TERESA, EL MEZQUITE AD LLANO DE DOLORES
PUMPING STATIONS |
EA. |
4.0 |
3,280 |
|
2,315 |
965 |
|
RECOVER SALINIZED SOIL BY
INSTALLING PARCEL DRAINAGE IN MODULES 4 AND 5 |
HA |
500.0 |
5,000 |
|
5,000 |
|
|
REHABILITATE, UPGRADE AND
TECHNICALLY IMPROVE IRRIGATION BY IMPLEMENTING LOW-PRESSURE AND GATED PIPING
IN MODULES 4 AND 5 |
KM |
5.2 |
1,200 |
|
1,200 |
|
|
REHABILITATE AND UPGRADE DISTRIBUTION
LINES IN IRRIGATION UNITS |
KM |
75.0 |
58,655 |
|
46,002 |
12,653 |
|
PROJECTS AND SUPERVISION |
|
|
5,242 |
1,822 |
2,738 |
682 |
|
|
|
|
|
|
|
|
|
TOTAL |
|
|
110,269 |
15,366 |
76,976 |
17,927 |
|
The project considers the following coverage:
PROJECT COVERAGE |
|||||
Type of Users in Sector |
Sector Area (ha) |
||||
Community |
Private |
Total |
Community |
Private |
Total |
701 |
617 |
1,318 |
4,849 |
5,866 |
10,715 |
The
following outcomes are expected:
PROJECT OUTCOMES |
|
Efficiency (%) |
|
Current |
Future |
35.0 |
47.0 |
The following investments are proposed:
INVESTMENT PROGRAM SUMMARY
|
||
Activity |
Unit |
Amount |
Investments |
$/ha |
10,266 |
Average
harvest area |
ha |
10,715 |
Average
available flow* |
Mm3 |
96 |
Reclaimed
flow |
Mm3 |
25 |
Cost of
reclaimed flow |
$/m3 |
4.4 |
*based
on average use in 1996, 1997 and 1998 |
-
Irrigation District 103, Río Florido.
PROJECT INVESTMENT SCHEDULE FOR IRRIGATION DISTRICT
103 RIO FLORIDO |
|||||||
Item |
Unit |
Qty. |
Amount in thousands of pesos |
||||
Total |
Year 1 |
Year 2 |
Year 3 |
Year 4 |
|||
REPAIR SLABS AND STRUCTURES, REPLACE
ASPHALT SEAL IN MAIN CANALS R.M. AND L.M. LINING JOINTS, MODULE 1,
MUNICIPALITY OF OCAMPO, DURANGO |
KM |
34.3 |
1,640 |
532 |
1,108 |
|
|
REPAIR SLABS AND STRUCTURES,
REPLACE ASPHALT SEAL IN MAIN CANALS R.M. AND L.M. LINING JOINTS 16+343, MODULE
2, MUNICIPALITIES OF LOPEZ AND CORONADO, CHIH. |
KM |
90.6 |
5,350 |
1,737 |
3,613 |
|
|
METERING AND GAUGING DEVICES IN
CONTROL AND DELIVERY POINTS IN MAIN CANALS L.M., MODULE 1 AND MAIN CANALS R.M., AND LAT. CANALS L.M. KM 16+343
MODULE 2, MUNICIPALITIES OF LOPEZ AND CORONADO, CHIH. |
EA. |
6.0 |
1,000 |
325 |
675 |
|
|
REHABILITATION OF SAN ANTONIO
DIVERTING DAM |
EA. |
1.0 |
1,500 |
487 |
1,013 |
|
|
LINE AND/OR PIPE SUBLATERAL CANALS
AND PROVIDE AND INSTALL LOW-PRESSURE IRRIGATION SYSTEMS WITH GATED PIPING IN
MODULES 1 AND 2 |
KM |
112.0 |
36,510 |
11,852 |
24,658 |
|
|
AGRICULTURAL LAND GRADING AND
LEVELING IN MODULE 2, MUNICIPALITIES OF LOPEZ AND CORONADO, CHIH. |
HA |
3,170.0 |
12,000 |
3,895 |
8,105 |
|
|
ELECTRICITY POWER IN M.C.R.M. AND
M.C.L.M., MODULE 2, CHIHUAHUA UNIT |
KM |
40.0 |
7,000 |
2,272 |
4,728 |
|
|
|
|
|
|
|
|
|
|
GRAND TOTAL |
|
|
65,000 |
21,100 |
43,900 |
|
|
The project considers the following coverage:
PROJECT COVERAGE |
|||||
Type of Users in Sector |
Sector Area (ha) |
||||
Community |
Private |
Total |
Community |
Private |
Total |
944 |
873 |
1,817 |
4,628 |
6,649 |
8,277 |
The
following outcomes are expected:
PROJECT OUTCOMES |
|
Efficiency (%) |
|
Current |
Future |
33.0 |
48.0 |
The following investment are proposed:
INVESTMENT PROGRAM SUMMARY
|
||
Activity |
Unit |
Amount |
Investments |
$/ha |
7,853 |
Average
harvest area |
ha |
8,277 |
Average
available flow* |
Mm3 |
91 |
Reclaimed
flow |
Mm3 |
28 |
Cost of
reclaimed flow |
$/m3 |
2.32 |
*based
on average use in 1996, 1997 and 1998 |
5). Project Justification
Given
the proposed water conservation objectives, it may be inferred that the
deferment of the projected activities will aggravate the problem the project
intends to solve, including the following issues:
·
Constant reduction of water supply
to irrigation areas.
·
Constant reduction of the districts
agricultural production.
·
Progressive deterioration of
existing infrastructure.
·
No capacity to face adverse weather
conditions.
·
Less availability of water in the
Rio Bravo basin, with the corresponding environmental consequences.
·
Difficulties in assuring flows to
the Rio Grande required under the 1944 Water Treaty.
The
development of this project will enable the districts to face the above
problems; thus, its implementation will represent a great opportunity to
reverse such impacts.
The Government of Mexico assures that a serious drought that has
affected the Rio Grande basin, particularly on the Mexican side, has caused
Mexico to fall behind in its water contributions to the Rio Grande, according
to the terms set forth in the February 3, 1944 U.S.-Mexico Water Treaty. In response, the governments of Mexico and
the United States have been working to design a strategy that will take into
account, on the one hand, the needs of the communities and irrigation districts
in Mexico and, on the other, the need to comply with the provisions of the
Treaty. On June 28, 2002, Minute 308
was signed by IBWC and CILA as a
commitment to work towards a solution. (see Attachment 1.d.1. Minute
308).
It is precisely under the terms of Minute 308 that the National Water
Commission of Mexico proposes this project which is primarily aimed at saving
irrigation water in the Rio Conchos basin. The volume of water that will be
saved with the proposed works is expected to reach the Rio Grande as part of
the International Water Treaty signed in 1944. The governments of the United
States and Mexico will establish the framework necessary for water deliveries
in accordance with Minute 308. The projected volume of water to be saved is
based on estimates of a water model developed by the National Water Commission
of Mexico. The estimated amounts are detailed in the table presented in the
first sections of this chapter.
Chapter
2.- Human Health and Environment
The projects environmental evaluation was developed according to the guidelines specified by the BECCs Project Certification Criteria in Section 2 Human Health and Environment. The project considered the contents of items 2 and 3, consisting of those that, according to law, do not require an environmental evaluation, as well as the criteria for projects that may have transboundary environmental impacts.
The environmental evaluation
contains the items described below:
-
Analysis of direct, indirect,
cumulative, short and long term impacts of the project on the areas
environmental elements (e.g. ecosystems integrity, biological diversity,
sensitive environmental habitats, and human health).
-
Description of inevitable negative
impacts and actions to be taken to mitigate such impacts.
-
Analysis of the proposed projects
environmental benefits, risks and costs, as well as environmental standards and
objectives of the project area.
The project intends to
achieve comprehensive watershed management based in a more efficient use of
water, solving thus the issues described below:
With regard to the quality of water, the Conchos River collects
wastewater contaminated by agricultural activities through the use of
fertilizers and pesticides, which cause health problems, particularly in
children.
An additional problem is the lack of appropriate metering and monitoring
systems. Water quality metering activities in water bodies that receive
discharges from agricultural drains do not include pesticide analysis or
detection of other compounds such as organochlorinates, organophosphates,
carbamates, organosulfurs, organotins, formamidines, thiocyanates, and
dinitrophenols.
Major
contaminants found in local surface water bodies, primarily in the Conchos,
Grande, Florido and San Pedro rivers, included total and fecal coliforms, which
result from household discharges.
Both the
Conchos and the Rio Grande show an increased concentration of nutrients,
primarily due to discharges from irrigation districts agricultural drains.
Downstream fro the Delicias irrigation district the Conchos River has been
observed to have increased concentrations of nitrates, total dissolved solids,
hardness, alkalinity, and conductivity.[1]
The
excessive use of fertilizers increases soil salinity, causing problems for
agricultural productivity. If nutrient levels continue to increase in the
future, serious eutrophication problems will result in local bodies of water.
The seepage
of these compounds into groundwater bodies also causes additional problems,
such is the case of water with a high content of nitrates, which reduces the
bloods oxygen-carrying capacity. This is particularly important for childrens
health because children may develop methaemoglobinaemia.
As for the
occurrence of high concentrations of nutrients, primarily due to irrigation
district discharges, ecosystems have been affected, since there could be a
process of eutrophication and presence of aquatic weed.
Following is a table summarizing Rio Grandes water quality features.
WATER QUALITY IN THE RIO GRANDE1 PURSUANT
TO PHYSICAL, CHEMICAL AND BIOLOGICAL PARAMETERS, 1990-1998 (Yearly averages) |
||||||||||
Parameter |
Unit |
1990 |
1991 |
1992 |
1993 |
1994 |
1995 |
1996 |
1997 |
1998 |
Ammonium
(NH4) |
mg/l |
0.60 |
1.57 |
0.43 |
0.65 |
0.75 |
0.07 |
0.03 |
0.03 |
0.03 |
Fecal
coliforms |
n/100 ml |
na |
1.47E3 |
4.93E2 |
6.91E2 |
1.0E2 |
1.1E3 |
1.0E2 |
4.6E1 |
107 |
BOD (20oC, 5d) |
mg O2/l |
3.55 |
3.19 |
3.10 |
3.58 |
4.43 |
3.14 |
3.12 |
2 |
2.4 |
COD(K2Cr2O7) |
mg O2/l |
52.0 |
33.0 |
76.0 |
34.0 |
56.6 |
16.6 |
na |
na |
15.33 |
Nitrates (NO3) |
mg/l |
0.17 |
0.34 |
0.22 |
0.16 |
0.186 |
0.150 |
0.15 |
0.18 |
0.16 |
Orthophosphates |
mg/l |
na |
na |
na |
na |
na |
0.70 |
0.11 |
0.13 |
0.10 |
Dissolved
Oxygen |
mg O2/l |
7.04 |
8.11 |
8.25 |
8.55 |
7.58 |
9.56 |
7.45 |
8 |
7.67 |
Dissolved
solids |
mg/l |
939 |
808 |
865 |
950 |
1046 |
1073 |
1054 |
1041 |
911 |
Suspended
solids |
mg/l |
65 |
138 |
100 |
59 |
55.6 |
55.6 |
32 |
35 |
26.33 |
1
Gauging station: Puente Viejo Matamoros (25º53´00´´ N; 97º30´30´´ O). E:
Exponential notation. e.g. 1.1E4 = 11000 Note: Fluctuations
in hydrometeorological conditions in the countrys different regions,
combined with CNAs actions to control wastewater discharges to various
bodies of water, are largely responsible for the variations observed in the
concentration of certain substances. Source: Semarnap, Comisión Nacional del Agua, 1999 |
Additionally, the study titled Large Vision Strategies for Water Supply
and Management in Border Area Cities and Watersheds for the 1999-2025 Period,
developed by the Office of Coordination of Border Issues of the National Water
Commissions General Deputy Directorate of Construction explains Water Quality
Indices (WQI) for the different local streams. As such, the entire Conchos
River was characterized as a highly contaminated river, since its WQI ranged
from 20 to 50. Despite the fact that the rivers influence area is very large
and there are only three monitoring stations, the data reviewed were
homogeneous and showed little variation (see Attachment 2.2.).
The Water Quality Index (WQI) indicates the degree of water contamination
at the time of the sample, and is expressed as the percentage of pure water.
Thus, highly contaminated water will have a WQI equal or close to zero percent,
while for high quality water, the index will be closer to 100%.
The WQI was developed in accordance to the following phases: the first
phase consisted of creating a rating scale according to the different uses of
water. The second phase involved the development of a rating scale for each
parameter, so a correlation could be established between the different
parameters and their influence in the degree of contamination. Once these
scales were prepared, mathematical models were developed for each parameter,
which convert physical data into their corresponding quality index for each
parameter (Ii). Since certain parameters are more significant than
others in how they impact water quality, this fact was considered by
introducing weight factors (Wi) according to their degree of
importance. Finally, indexes for each parameter are averaged to obtain a WQI
for each water sample.
WATER QUALITY RATING SCALE FOR SPECIFIC USES
ACCORDING TO WATER QUALITY INDEX (WQI) |
||||||
WQI |
Water Uses |
|||||
Value (%) |
General criterion |
Public Supply |
General Recreation |
Fishing and Aquatic Life |
Industrial & Agricultural |
Sailing |
100 |
Excellent |
No purification required |
Acceptable for any aquatic sport |
Acceptable for all organisms |
No purification required |
Acceptable |
90 |
||||||
80 |
Acceptable |
Requires some purification |
Requires some purification for certain processes |
|||
70 |
Greater need for treatment |
|||||
60 |
Contaminated |
Acceptable but not recommendable |
Acceptable, except for very sensitive species |
No treatment required for industrial use |
||
50 |
Uncertain for sensitive species |
|||||
40 |
Highly contaminated |
Uncertain |
Uncertain |
Only very resilient organisms |
Requires treatment to be used in most industries |
|
30 |
Unacceptable |
Unacceptable |
Avoid contact with water |
|||
20 |
Signs of contamination |
Unacceptable |
Very restricted use |
Contaminated |
||
10 |
Unacceptable |
Unacceptable |
Unacceptable |
|||
0 |
||||||
Source: Semarnap, Comisión Nacional del Agua, 1999. |
With regard to organic matter in low tide and rainfall, respectively,
along the entire Rio Grande waters may be characterized as acceptable during
low tide season, except in some stations located near population centers with significant
industrial and commercial activities.
The Conchos River presents a split. In its origin it conveys
contaminated water (50 to 70 WQI); however, at its confluence with the Rio
Grande, organic matter levels provide for acceptable water.
During the rainy season the Rio Grande, including the Conchos and
practically all surface waters in the region, become contaminated.
Bacterial contamination of surface water reaches unacceptable levels in
large sections of the Rio Grande and the Conchos.
During the rainy season, practically the entire Rio Grande, as well as
the Conchos, become highly contaminated by bacteria.
As far as QWIs nutrient results, these range from acceptable to
excellent; Conchos river water is characterized as excellent and a large
portion of the Rio Grande may be classified as acceptable, with a small portion
characterized as excellent the portion located approximately between Nuevo
Laredo and Ciudad Mier.
Nitrogen and phosphorous compounds are major plant nutrients that may
limit their growth at low concentrations and may cause excessive growth at high
concentrations. The abundance of nutrients, as well as other favorable
conditions such as light, water movement and available substrate, may result in
the excessive growth of phytoplankton and macrophytes (aquatic weeds). Thus,
this excessive plant growth may jeopardize water stream resources as follows:
-
The excessive growth of aquatic algae and macrophytes
may deteriorate the aesthetics of the body of water and interfere with its
recreational use.
-
Excessive plankton and
organic matter cause water supply problems as they increase water treatment
costs.
-
The accumulation of
plankton and macrophytes may use up all the oxygen dissolved during the night
or low flow periods, causing asphyxia in fish and other aquatic species.
-
The proliferation of
extremely productive plants in aquatic communities may be different in nature
and less stable than native species.
-
At high concentrations, nitrogen
poses risks to human health.
The most
common sources of nutrients include fertilizers (from agriculture, household
use, golf courses), wastewater and other non-specified urban activities.
In the portion of the Rio Grande watershed that meets the Conchos,
studies have found concentrations that are considered hazardous, since the
level of nutrients are so high that they result in the excessive growth of
aquatic vegetation and probably decrease dissolved oxygen concentrations.
The trend for nutrients described in the same analysis report shows two
parameters for nitrogen total nitrate and total nitriteand two parameters for
phosphorus total and dissolved phosphorous-.
Sources of phosphorous and nitrogen include wetland overflows, forests,
erosion, and the decomposition of plant and animal matter. Anthropogenic
sources refer to treated effluent from the sewage system and septic tank
discharges, slaughterhouse waste, agricultural fertilizers, urban rainwater
overflows, industrial waste discharges, and phosphated detergents.
Trends observed in the Rio Grande upstream from its confluence with the
Conchos indicate an increase in the amount of total and dissolved phosphorous,
while total nitrogen and total nitrate do not show any significant trend.
In the area of the Rio Grande located downstream from the confluence
with the Conchos, near Presidio, a decreasing trend was observed for total
nitrate, and a non-significant trend was observed for total phosphorous. Other
parameters were not analyzed.
Additionally, Texas Strategic Plan, State Of The Rio Grande and
the Environment of The Border Region, Fiscal
years 2003 - 2007 Volume 3., see Attachment 2.3., reports data from the
segment that includes the confluence of the Conchos and the Rio Grande and up
to the International Amistad Dam.
According to the above
report, the most significant problems faced by the Conchos River are the lack
of wastewater treatment systems in cities and rural communities, as well as the
high levels of nutrients resulting from fertilizers that flow into the drains.
Among other things, these two factors are enough to deteriorate aquatic plants
and increase bacteria in the river, which in turn affects potable water supply,
irrigation, and other uses.
The official definition of
pesticides (Mexican Federal Registry Diario Oficial de la Federación, March
14, 1988) states that pesticides are substances or mixtures of substances
intended to control undesirable species (including vectors for human and animal
disease) that harm or interfere with agricultural and forestry production and
impact material resources during their storage and transportation, as well as
species that interfere with human and animal well being.
Many pesticides have helped
humans control pests, but they have also caused a large number of alterations,
such as cancer disease, teratogenic risks, and miscarriages.
Pesticides and chemical
agricultural products are not common sources of pollution, but flow into the
river when they result from water runoffs from parks, agricultural fields and
vacant lands.
Concentrations of these
chemicals may result in the contamination and death of fish and a reduced
quality of water.
With regard to pesticides,
the table included in Attachment 2.4 shows excess levels that have been found
in water.
As for fecal coliform trends, the 1996 Assessment of Water Quality in
the Rio Grande (TNRCC) concludes that increased levels of fecal coliform
bacteria are found in some points upstream of metropolitan areas, while reduced
levels have been observed downstream.
Additionally, the Strategic Plan, State of the Rio Grande and The Environment of the Border Region, Fiscal
years 2003 - 2007 Volume 3. See Attachment 2.2., reports data from the segment
that includes the confluence of the Conchos and the Rio Grande. The report
finds that standards for recreational use are not met due to the high level of
bacteria. Downstream from Ojinaga and Presidio bacteria levels increase and
cause the entire segment to be included in the States 303(d) list of water
bodies that do not meet water quality standards developed by the State of Texas
in 2002 (TNRCC, 2001b and TNRCC,
2001c.)
1). Issues.
The use of water in Conchos river irrigation districts involves
considerable transboundary effects by significantly impacting water
availability in the Rio Grande. This becomes especially noticeable during
periods of drought that are common to the region and which, if no action is
taken, may result in serious consequences for productivity and would jeopardize
the areas sustainability. Since the
water saved by the conservation actions will be conveyed to the Rio Grande,
these flows will provide beneficial transboundary impacts.
Thus, the proposed project focuses on water conservation, mindful of the
relationship with the environment.
In this regard, water availability in the Rio Grande watershed,
particularly in the years that have had adverse weather conditions, has shown a
severe deficit.
This situation evidences the projects importance in the light of
binational cooperation between Mexico and the United States
2). Human Health and Environment.
Major contaminants found in local bodies of surface water, primarily in
the Conchos, Grande, Florido and San Pedro rivers, include total and fecal
coliforms resulting from household discharges. These contaminants may be
responsible for gastrointestinal diseases.
Diseases may appear mostly in rural communities that lack disinfection
systems and take water directly from contaminated bodies.
Water quality degradation causes health problems, especially in
children, who are the main victims of waterborne diseases.
Additionally, there is a
high incidence of gastrointestinal diseases, usually associated to the
inadequate handling of wastewater. The above is shown in the following table:
NEW CASES OF DISEASE BY YEAR IN THE MUNICIPALITY OF
OJINAGA |
|||||||
DISEASE |
1995 |
1996 |
1997 |
1998 |
1999 |
2000 |
2001 |
Amebiasis |
148 |
44 |
167 |
127 |
120 |
89 |
148 |
Other parasitosis |
13 |
38 |
100 |
65 |
55 |
39 |
77 |
Typhoid fever |
N.D. |
N.D. |
N.D. |
2 |
2 |
9 |
4 |
Paratyphoid fever and
other salmonellosis |
N.D. |
6 |
5 |
10 |
6 |
17 |
22 |
Hepatitis A |
N.D. |
16 |
7 |
2 |
6 |
5 |
5 |
Intestinal infections
cause by other organisms and others not defined |
1,559 |
1,324 |
1,895 |
2,484 |
2,434 |
2,285 |
3,441 |
Scabiosis |
N.D. |
7 |
18 |
13 |
37 |
12 |
23 |
Source: Dr. Trinidad Jerónimo
Castaño, Epidemiologist at Jurisdiction I, Secretariat of Health,
Ojinaga, Chihuahua |
According to the
death records database developed by INEGI/SSAs General Directorate of
Information and Performance Evaluation, main causes of mortality reported by the
locality in the year 2000 include intestinal infectious diseases at 0.9%, with
only 143 deaths (see Attachment 2.a.1.).
The National
Water Commission considers water use efficiencies for agricultural activities
to be very poor in the Conchos basin irrigation districts. Thus, the project
intends to improve efficiency in a manner that the water saved through the
efficiencies, will be made available for their conveyance to the Rio Conchos
below the Delicias District and their further conveyance to the Rio Grande.
The
Project for Modernization and Technical Improvements to the Conchos River
Irrigation Districts includes canal lining, land grading, and improvement of
irrigation techniques.
The
project will help reduce water demands in irrigation districts and will improve
the application of water to crops, which will in turn improve the use of
pesticides and fertilizers and will reduce the concentration of these
contaminants in water before it is discharged into the river.
In
addition, land grading will prevent erosion and will allow for better use of
surface water flow.
Information
related to the project area shows that this is an upset area as to water flow
and contamination. As such, the project will promote benefits by increasing
water volumes, which will reduce contaminant concentrations.
Additionally,
by improving irrigation districts, the project will also enhance the use of
chemicals for agriculture and will mitigate contamination caused by such
products, reducing therefore health impacts.
The project,
in spite of not being a wastewater treatment project, will provide water users
better conditions to enhance their quality of life.
It is
evident that construction needed to rehabilitate the districts and the use of
heavy machinery and equipment will create emissions to the atmosphere; however,
this impact will be temporary and will cease as soon as the work is completed.
With the
implementation of this project it is expected an increased water flow in the
Conchos River resulting from volumes reclaimed by the implementation of water
conservation actions in irrigation districts.
Improved
operations in irrigation districts and reservoirs will prevent extremely high
flows and dry rivers, which will tend to standardize flows discharged to the
Conchos by the reservoirs, maintaining thus more stable flow conditions in the
river and benefiting its habitat.
The
implementation of better irrigation systems will promote the use of
fertirrigation to optimize the application of agrochemical compounds. This will
potentially reduce agricultural returns and the incorporation of agricultural
chemicals to surface and underground bodies of water.
The meeting of the Conchos and Rio Grande rivers involves sharing impacts in the border area. We must remember that environmental factors know no political boundaries, as they are dynamic systems. In this case, the projects impact will be beneficial, as it will increase water flows to the Rio Grande and as a result, will increase dilution capacity. This will help reduce the concentration of contaminant substances.
Other
benefits for Conchos farmers include:
·
Greater certainty regarding the
availability of irrigation water;
·
Equitable availability of water for
crops;
·
Greater opportunities for water use;
·
Higher crop yields;
·
Improved crop quality;
SEMARNATs Undersecretariat for Environmental Protection, through its
Office of Environmental Impact and Risk, informed CNA that an environmental
impact assessment process is not required for the tasks and activities included
in the project. This was communicated through letter S.G.P.A./DGIRA.DG.
00647.02, dated September 20, 2002. (see attachement 2.c.2)
The project will be built in land that has already been upset and as
such, proposed actions are considered rehabilitation measures.
In addition, a Finding of No Impact to historical resources is in
process from the Instituto Nacional de Antropología e Historia. [National
Institute of Anthropology and History] (INAH)
SEMARNAt
expressed its consent regarding eligibility of the project through letter 1498,
dated September 17, 2002. (see attachement 2.c.2)
Likewise,
on October 3, 2002, BECC received a letter from EPA expressing consent
regarding eligibility of the project. (see attachement 2.c.2)
Chapter 3.- Technical Feasibility
The
features of the proposed tasks are intended to improve existing facilities used
by the irrigation districts. These features were selected after a careful
analysis of current operating efficiencies and a review of their present physical
conditions.
Although
the certification is proposed exclusively for the project of Delicias
Irrigation District 005, it is important to include some information of each of
the districts in the region that address overall objectives. It should be noted that modernization
objectives will largely be achieved with completion of the projects in the
district of Delicias, the largest District.
From the
basis of current efficiencies reported by the irrigation districts and
considering theoretical efficiencies of project components, the project will
help increase water use efficiencies and thus will conserve water as follows:
RECLAIMED
WATER VOLUME BY IRRIGATION DISTRICT in Mm3 |
|||
Irrigation District |
Used volume |
% of savings |
Reclaimed volume |
ID-005 Delicias |
857 |
40 |
356 |
ID-009 Lower Río Conchos |
96 |
26 |
13 |
ID-103
Río Florido |
91 |
30.8 |
28 |
TOTAL |
1044 |
|
396 |
The above rates and volumes are related to current areas and water
consumption, which are impacted by the different components of the proposed
infrastructure (see Attachment 3.a.1. Water Savings Analysis for the
Conchos River.)
The proposed tasks will impact irrigation efficiencies as shown in the
following table.
INCREASED
EFFICIENCY BY IMPLEMENTATION OF PROPOSED
ACTIONS IN IRRIGATION DISTRICTS |
|||
ACTIONS |
CURRENT* |
PROPOSED** |
INCREASE |
Canal
lining |
53 |
90 |
37 |
Piping |
53 |
90 |
37 |
Land
grading |
45 |
75 |
30 |
Pumping,
low-pressure irrigation, and grading |
|
|
37 |
(*):
Estimated (**): Theoretical |
Given its technical characteristics, the increase that may be achieved
in irrigation efficiency with the implementation of the proposed actions is
verifiable. The proposed actions may be compared with the implementation of
similar actions in other irrigation districts.
Additionally, the implementation of actions to upgrade and technically
improve irrigation districts includes different types of training for water
users and utility officials, including those directly related to water
conservation and organization of modules.
Projects
Technical Specifications
For the development of the Project for Modernization and Technical
Improvements to the Conchos River Irrigation Districts, Attachment 3.a.1.1.,
describes the main technical specifications considered.
Irrigation districts have regulations, and each of their modules has
operation standards applicable to each agricultural cycle. The purpose of these
rules is to regulate the management, operation, conservation, maintenance and
improvement of infrastructures and concession assets, water distribution, and
irrigation services provided to ID users. See attachment 3.b.1.
The IDs minor lines are operated by users, who have established
community associations. The Commission operates headworks and oversees the
operation and maintenance of concession works.
IDs are divided in units, which are in turn divided into modules based
on infrastructure features to facilitate deliveries. Their functions involve
the statistical control of irrigation plan analysis and verification of water
deliveries, and are related to crop yield as it pertains to applicable
recommendations.
IDs rules are governed by the National Water Law and Regulations.
Evidently, operation and maintenance actions are carried out by the
users themselves in the case of works that involve main canals, and by the
Commission in headworks.
As for the study project, training actions are required to improve crop
yield and the use of applied technology, and to increase productivity. The
project proposes a series of training events that will include the following
topics:
-
Business Management
-
Operation, Conservation, and
Management
-
Irrigation Water Metering
-
Water Culture
-
Operation of Heavy Machinery.
Operation
and Maintenance Policies.
Infrastructure activities proposed to increase irrigation district efficiencies are not enough in and of themselves. Rather, they must be combined with policies aimed at improving operation and maintenance and ensuring adherence to water right allocations and diversions established under Mexicos legal framework.
Operation Improvements.
a)
Development of Crop Schedules.
Increasing irrigation water use efficiency requires the use of water allocation
techniques and methods that consider crop response to water amounts applied in
each growth period.
b)
Optimal use of saline and fresh
water. Some sites have a certain amount of water with high salt content.
Overall, this water is not used for irrigation, but research indicates (Dinar
et al 1986) that both types of water may be used in combination to maximize
benefits. In addition, using water with high salinity eventually enables
farmers to increase crop areas. This type of irrigation system is not feasible
for all crops, but only for those that have some resistance to salinity.
c)
Monitoring soil and weather
conditions. The identification of soil conditions during the development of a
crop may allow farmers to provide crops an accurate amount of water in a timely
manner. One way of achieving this is to install continuous recording metering
devices. A promising method consists in implementing less expensive devices
(primarily tension meters) in parcels. Farmers are responsible for collecting
the soils humidity and tension data and taking it to the irrigation districts
central unit. With this information, the individuals responsible for the
systems operation can decide more objectively when to irrigate the crops.
d)
A more relevant problem, not only to
achieve adequate control of the irrigation system, but also to make any
efficiency increase action feasible (ASCE, 1974), is to obtain sufficient and
accurate data. With regard to this, two important actions are worth
highlighting: irrigation water metering and net radiation metering. From these,
other research and development lines may be expanded.
e)
Periodical hydrological review.
Periodical hydrological reviews are advisable, since more information on supply
sources will become available with time. The above will help the project define
the maximum irrigable area, overall operation policies, and/or crop plans that
are congruent with water availability and efficient water use policies..
f)
Gauging structures. The
implementation and/or development of cost-effective and simple-design gauging
structures for gravity irrigation systems is a very relevant issue. System
efficiency improvements will not be achieved without water metering. This
activity may begin by implementing structure design methods that will not
require field calibration, such long-throat gauges (Martínez-Austria & Castillo,
1991). These gauging structures may be automated by installing electronic
devices (Espinosa and Contreras,1991).
Suppliers of mechanic, electrical or electromechanic equipment must
provide operation and maintenance manuals that shall be included in these
programs to prevent the premature deterioration of equipment.
Maintenance.
Considering current policies related to water conservation and efficient
use of water stemming from the lack of water resources in the study area and in
the country overall, irrigation district works require constant preventive and
corrective maintenance to prevent the gradual deterioration of the works and
avoid incurring losses in irrigation efficiencies and eventual high repair
costs.
The agency in charge of managing the irrigation district will be
responsible for providing the necessary maintenance to headworks,
understanding such as being water intake and conveyance structures, as well as
main canals. In addition, the agency must foresee the need to turn over the
operation and maintenance of minor lines to water user associations trained and
supervised by the applicable agency.
These actions will allow the agency to gradually transfer the operation
and maintenance of all district works to their final users the farmers.
The project also proposes training for operators of new equipment and
infrastructure as a responsibility of equipment vendors.
It must be noted that the development of proposed works complies with
all applicable standards and regulations issued by Mexican and international
technical agencies and institutions, and conforms to the CNAs regulatory
framework.
Current standards and
specifications, manuals, and design guides applicable to the project include:
·
[Mexican] General Law for Ecological Equilibrium and Environmental
Protection
·
Chihuahua State Environmental Law.
·
Mexican Official Norm
NOM-001-ECOL-1996, NOM-031-ECOL-1993 y NOM-052-ECOL-1993
·
D.G.N.. Technical Standards and Regulations for Electrical Installations
·
ASTM. American Society for Testing Materials
·
AWWA. American Water Works Association.
·
ANSI. American National Standards Institute
·
OSHA. Occupational Safety and Health Administration
·
National Water Commissions Standards and Specifications.
·
Construction Regulations for Mexico City and Complementary Technical
Standards.
·
Construction Regulations for Reinforced Concrete Buildings ACI-318R-89
and comments.
·
Concrete Sanitary Structures for Environmental Enhancement ACI-350R-89.
·
American Institute of Steel Construction (AISC)
·
American Welding Society (AWS)
·
American Society of Mechanical Engineers (ASME)
·
American Society of Civil Engineers (ASCE)
·
Portland Cement Association (PCA)
·
Chihuahua States Construction Regulations
The project conforms to the
provisions of development plans applicable to the study area.
With regard to the National Development Plan, which establishes general
guidelines to achieve sustainable development at the national level, section a)
on water withdrawal, distribution and use was reviewed and states the
following:
a) Environmental policy for sustainable growth.- the main objective establishes a high priority for making efficient use of water and ensuring water supply.
Chapter 4.- Financial and Administrative Feasibility of the Project
The amount required for the modernization and technical improvements of
the Rio Conchos Irrigation Districts amounts to 1,540 million Pesos over a
period of 4 years.
For the modernization and technical improvements of the Delicias 005
Irrigation District, the reason for certification, a 4-year investment of 1,360
million Pesos is required, or 88% of the
total required for the three districts.
The
following provides a table of investments for the Delicias 005 Irrigation
District for the cost of the main works over the 4-year duration of the
project.
INVESMENT PROGRAM FOR THE DELICIAS 005 IRRIGATION
DISTRICT |
|||||||
ITEM |
Unit |
Quantity |
Amount in Thousands of Pesos |
||||
Total |
Year 1 |
Year 2 |
Year 3 |
Year 4 |
|||
REPAIR OF RIPRAP/LINING OF THE
MAIN RIO CONCHOS DIVERSION CHANNEL FROM KM. 6+980 TO KM 19+980 |
KM |
3.0 |
10,000 |
10,000 |
|
|
|
GAGING/WATER MEASURING DEVICES AND
HEADGATE CONTROLS. PRINCIPAL CONCHOS
AND SAN PEDRO CHANNEL CONTROL POINTS & DELIVERY WORKS |
LOT |
1.0 |
6,000 |
6,000 |
|
|
|
RIRRAP AND/OR PIPING OF LATERAL
AND SUBLATERAL CHANNELS. |
KM |
601.6 |
301,324 |
107,815 |
94,377 |
43,481 |
55,651 |
LOW PRESSURE IRRIGATION SYSTEMS
WITH MULTIPLE-SIZE PIPES |
HA |
17,136.0 |
245,331 |
87,781 |
76,839 |
35,401 |
45,309 |
LEVELING OF AGRIULTURE LAND |
HA |
21,421.0 |
70,769 |
25,321 |
22,165 |
10,212 |
13,070 |
WELLS & HIGH PRESSURE DISTRIBUTION
SYSTEMS |
HA |
17,136.0 |
377,430 |
135,046 |
118,214 |
54,463 |
69,706 |
PUMP STATIONS. LOW PRESSURE IRRIGATION |
HA |
8,569.0 |
150,971 |
54,018 |
47,285 |
21,785 |
27,882 |
WELLS & LOW PRESSURE
DISTRIBUTION SYSTEMS |
HA |
5,998.0 |
89,167 |
31,904 |
27,928 |
12,867 |
16,468 |
MANAGEMENT & SUPERVISIÓN |
|
|
76,807 |
29,375 |
23,172 |
10,650 |
13,610 |
|
|
|
|
|
|
|
|
TOTAL |
|
|
1,327,799 |
487,261 |
409,980 |
188,859 |
241,697 |
As for the
financial analysis, the following financial structure was established for the
financing of the works for the Delicias 005 Irrigation District in Chihuahua.
Actual Expenditures (Annual) |
|
Item |
Amount
($Pesos) |
Operations
Income Operations
Costs Non-Operation
Costs |
17,053,360 14,604,710 4,051,610 |
Cost Estimates |
|
Item |
Amount ($Pesos) |
Construction
Contingencies
(6%) |
1,354,799,000 81,288,000 |
Total |
$
1,436,087,000 |
Financing Structure
Source |
Amount ($Pesos) |
% |
Federal Resources (Grant) |
1,036,087,000 |
72 |
NADB Water Conservation Infrastructure Fund
(Grant) |
400,000,000 |
28 |
Total |
$1,436,087,000 |
100% |
In other words, the Federal Government of México will participate with 72% of the financing for the project and 28% by the North American Development Bank.
The users of the Delicias Irrigation District, in accordance with their authorized concessions for the use of the infrastructure, must cover the costs of the operation and maintenance of the headworks and principal channels that the National Water Commission of Mexico currently operates, as well as the costs of the secondary distribution infrastructure operated by the users themselves. Currently, the fee for the two systems is 80 Pesos per 1,000 cubic meters of water.
FEES (in Real Terms) IN PESOS PER THOUSAND m3 Volume |
|||||
|
2003 |
2004 |
2005 |
||
Fee |
$100 |
$100 |
$100 |
||
|
|
|
|
||
With this project, the operational conditions of the Irrigation District will be improved, but it will be necessary to make an adjustment in the tariff that will be required to be paid by the users to assure the proper operation and maintenance of the infrastructure at any time. The National Water Commission of Mexico has analyzed this and has determined that the fees for operation and maintenance of the infrastructure with the project should be those that are shown in the following table. Of course, as the users become more efficient in their management of the infrastructure, the fees could be reduced based on prior analysis.
The CNA organizational structure for the operation of each irrigation
district includes an Irrigation District Manager with an operations division, a
conservation division, an irrigation and drainage engineering division, and
finally, an administration division.
In addition, a general resident advisor position is included in the
organization chart for each district, filled by one or two specialized experts
depending on the situation. Annex No. 4c.1.1
includes the details of the organizational charts.
Chapter 5.- Community
Participation
1) Introduction
On July 24, 2002 the Border Environment Cooperation Commission received
an application submitted by the National Water Commission (CNA) for certification
of the Project for Modernization and Technical Improvements to the Conchos
River Irrigation Districts. Thereafter, on September 25, 2002, the CNA requested that certification
be limited only to the activities of Delicias 005 Irrigation District. This certification will enable the CNA to access various funding mechanisms available from the North American Development Bank.
BECC certification criteria includes Community Participation, in which a
Steering Committee must be created for projects proposed for certification.
This committee would be responsible for
facilitating project discussions and promoting public consultation in the
communities benefited or affected by the project.
This criterion establishes that at least two public meetings must be held, the first of which should be
announced thirty days in advance in the local media.
In accordance with the criteria, CNA submitted a Community Participation Plan on
September 4, 2002, and by the end of the public participation process,
presented a report demonstrating public support for the project.
CNA implemented
an aggressive community participation process to inform users along the
Rio Conchos watershed of the project for technical improvements in the
irrigation districts. First, there was a community participation or information
phase which ensured acceptance of the project by the users and a full
understanding of project benefits.
With completion of this first phase, the project complied with some
critical aspects of the community participation criterion, such as making
project information available to the stakeholders, and holding local
information meetings.
District users associations were established as Steering Committees for
the information and community participation process, the required public
meeting was announced with a 30-day notice period, and the public meeting and
the completion of Community Participation Report were strictly completed to
meet the requirements of the public process.
2)
Objectives of the Community
Participation Program
The purpose of the community participation requirement for projects
sponsored by border communities is to demonstrate that the project is
understood as to its technical, financial and environmental aspects. In
addition, the project must be accepted by most of the community with its
related benefits, costs, risks, and impacts.
This program ensured that project stakeholders were properly informed of
the projects technical and financial scope, as well as of its benefits and
impacts. The program also encouraged the stakeholders involvement in local and
public meetings to promote review and discussion of the project and to achieve
a consensus in favor of the proposed tasks.
The preliminary tasks for this program included the identification of
interested stakeholders and groups from the three irrigation districts and the
development of a report of baseline conditions to define communication and
information strategies.
In order to demonstrate that the message about the project was received
by most of the community, meetings were video-taped, minutes were prepared with
attendance sheets, and press releases were prepared, with signatures noting
approvals.
3)
Community Participation Committee
The public process was developed
directly with user groups which acted as Steering Committees, who facilitated the flow of
information to users in the irrigation districts benefited by this project.
The Rio Grande Regional Management Offices Users Association functioned
as technical secretary to ensure project information is presented in executive
summaries, that meetings were held, and to provide support for projects
overall logistics.
A meeting was held with the Boards of User Associations of the three
irrigation districts to explain their role in the public information process
and its objectives. This meeting also served to inform users about the
projects scope. BECC participated in explaining its role in the evaluation and
certification process, and the importance of community participation in the
projects certification.
At this preliminary meeting, Users Associations were formally
established as Steering Committees, although the sponsor later decided to
pursue the certification of only the Delicias, Chihuahua district.
4)
First Public Meeting
CNA held a regional public meeting with the Boards of the three
irrigation districts to inform them of this project, establish Steering
Committees and listen and address users questions regarding this project. This
meeting was held on September 18, 2002 in Delicias, Chihuahua; the first of two
meetings proposed to be held to meet BECCs community participation criteria.
As a result of this first public meeting, the three
users associations democratically elected the respective presidents of their
Steering Committees for the BECC process.
The elected officials were: for the Delicias Irrigation District 005
from Delicias, Chihuahua, Mr. Rafael Humberto Chavez Veliz; for the Rio Florido
Irrigation District 103, Mr. Oscar
Carrillo Herrera; and for the Lower Rio Conchos Irrigation District 090, Mr.
Rafael Ruiz Olivas.
The CNA, in coordination with the three Steering Committees, held a
public meeting with a 30-day advance notice, and it had wide
participation. A meeting scheduled for
Noon on October 5, 2002 in the offices of the district headquarters was
advertised in the Diario de Chihuahua on September 5, 2002, a newspaper with
wide coverage in the three irrigation districts.
In the first phase of the project, the CNA held various local and public
meetings about the project improvements in the three districts in accordance
with the public information procedures.
The three districts were informed of the technical and financial
concepts and goals of the project.
These information activities were included in the community
participation plan.
Project related information was available at the three district offices
from the start of the process. With the posting of the September 5, 2002
newspaper announcement in the Diario de Chihuahua, updated project information
was provided to the public at the offices of the headquarters of each
Irrigation District.
5) Project for Modernization and Technical Improvements to the Conchos
River Irrigation Districts Public Process Calendar
Task |
Dates |
Publish
notice in the Diario de Chihuahua |
September
5 |
First
public information phase |
First
half of 2002 |
Prepare documents, brochures, PowerPoint
presentation, for the information process |
September
4 10, 2002 |
Submit and
obtain approval for the Community Participation Plan |
September
4, 2002 |
First
public meeting with Users Associations Boards |
September
18, 2002 |
Information
and outreach in modules benefited in each irrigation district |
September
5 October 4, 2002 |
Second
public meeting in irrigation district of Delicias, Chihuahua |
October
5, 2002 |
Public
Participation Report |
October
7, 2002 |
6)
2nd Public Meeting
The second public meeting was held at Noon on October
5th, 2002 in the offices of Delicias Irrigation District 005 in Delicias,
Chihuahua, and since the CNA, the sponsor for the project, had requested the
BECC Board of Directors that the project initially only include the Delicias
Irrigation District, and the board approved of this, meeting was held with this
in mind with prior notice to the other districts.
The participation in the meeting included more than
200 farmers from the Delicias irrigation district, and the project concept was
presented again, with expected achievements, commitments and investment
requirements. The large majority of participants expressed their complete
understanding of the project and support for its implementation.
At this public meeting, some of the farmers expressed strong concerns
and in some cases opposition over the final use of the water saved. However,
all participants expressed their support for the project to improve the
management of water.
7)
Media Campaign
A media campaign with strategies to support the public information process was developed to ensure wide community coverage.
8)
Advertising Materials.
Various outreach materials were prepared, such as brochures, video tapes, fact sheets, newspaper announcements, workshops and forums, press releases, and other applicable project-related material.
9)
Final Report
The Rio Grandes Regional Management Office, in coordination with Users
Associations chairpersons, presented a Final Report supported by
documentation, including reports on how users were informed about the project,
local and public meetings held and their outcomes, minutes of meetings, and
exit polls. This demonstrates that the communities largely support the project,
understanding its characteristics and benefits. The above documents are
included in Attachment 5.a.8.
Chapter 6.- Sustainable Development
The
Project for Modernization and Technical Improvements to the Conchos River
Irrigation Districts relies on the definition and principles for sustainable
development stated below:
Sustainable
Development is defined as conservation oriented social and economic development
that emphasizes the protection and sustainable use of resources, while
addressing both current and future needs, and present and future impacts of
human actions, as defined in the Border XXI environmental program developed by
U.S. and Mexican authorities. This definition is based on the internationally
accepted sustainable development definition from the Rio Declaration on
Environment and Development: development that meets the needs of the present
without compromising the ability of future generations to meet their own needs.
Principle 1.
Human beings are at the center of concerns for sustainable development and are
entitled to a healthy and productive life in harmony with nature.
Principle 2. the right to development so as to equitably meet developmental and
environmental needs of present and future generations.
Principle.3. Sustainable development considers environmental protection
an integral part of the development process and as such, it may not be
considered separately.
Principle 4. Stakeholders in environmental infrastructure projects must
become involved in any activity related to such project, which means that:
-
Residents of the border area who are
directly being affected by environmental problems must have an opportunity to
participate in the decision making processes that impact environmental resource
protection and management in their community.
-
The experience and efforts of the
different agencies involved in environmental, social and economic enhancement
in all sectors of the community must be integrated, so as to achieve balanced
planning and a better use of scarce resources.
The proposed project will positively impact the basins of the Conchos
and Grande rivers by increasing their water flow, improving water quality and
favoring water conservation. Thus, local residents will benefit from better
agricultural yields within a sustainable development framework and from a
better quality of life within a nature conservation scheme, being careful not
to compromise water and soil resources for the future, considering that modernization
and technical improvements in their irrigation districts will help them take
better care of these elements by combining their use with environmental
protection.
In addition, the public review process ensures that residents in the
projects influence area participate in the development process fully aware
that the decisions they make will focus on the sustainable management of
environmental resources to achieve better environmental and socioeconomic
conditions in their community.
Thus, the project is recognized as one that fully complies with the
definition and principles of sustainable development and will leverage the
regions progress by promoting environmental conservation.
The diagnosis of the national water sector presents a complex issue, where human activities have deeply disturbed its economic, ecological and social stability. However, the project identifies a group of problems that encompass and describe negative situations that need to be solved:
-
Deficient water and water resource
use and management in irrigation districts and units.
-
Vulnerability in case of
contingencies due to extreme weather phenomena such as droughts.
-
A backlog in the implementation of
modernization actions.
Moving towards a solution for these problems requires acknowledging that
water, in addition to being indispensable for life, is a limited resource and,
due to its relative scarcity, has economic value. These circumstances result in
struggles for the right to use water.
There is competition for water in our countrys different regions:
cities need to make use of potable water, industries want it for their
processes, agriculture needs it to irrigate crops, and nature requires it to
preserve the environment. All of these uses of water are indispensable.
Economic growth and an improved quality of life in Mexico within a
context of sustainability understanding this as the responsibility of the
present generation to the future generations--, require us to establish now
conditions that will facilitate the allocation of water to different uses with
rationality.
The presence of water in basins and their aquifers, regardless of
political divisions, requires water planning to be developed within such units.
Each of them needs to implement water development plans that include the
following aspects:
-
Planning
-
Water management
-
Public awareness and community
outreach
-
Research and technological
development
-
Comprehensive metering and
information system
-
Potable water, wastewater collection
and treatment in urban and rural media
-
Efficient use of water in
agricultural, urban, and industrial systems.
-
Halting the deterioration of water
basins.
-
Reducing vulnerability to extreme
weather phenomena.
Public awareness seeks to support the development of a national water
culture and community involvement to achieve consensus as to how water
development objectives are to be met within each basin. Watershed Councils
described in the National Water Law [Ley Nacional de Aguas] must rely on a
major user organization base with a life of its own, convinced that they are
pursing common interests that are worth working for.
Increased water use efficiency is imperative to meet the growing demand
for the resource considering its finite availability. Investments to increase
water efficiency and productivity are significant and funding is not easy to
obtain. One option is to combine the needs and interests of Mexico and the
United States to fund projects that promote the efficient use of the limited
resource shared by the two countries.
The Project for Modernization and Technological Improvements to the
Conchos River Irrigation District stems from a long-standing problem:
As a result of the few loans available for agriculture and the reduction
of public investments for the water/agricultural sector, in addition to adverse
weather conditions, in the eighties, the agricultural National Domestic Product
had an annual growth approximately lower than 1 percent
This growth rate was lower than the rural populations growth rate,
causing thus hardship for agricultural products and major social issues in
Mexican rural areas.
The National Water Commission started a program to rehabilitate and
transfer irrigation districts to users grouped in user associations, with the
purpose of increasing water use efficiency and above all, the users
involvement in the operation, conservation and management of the transferred
water/agricultural infrastructure.
In 1995 CNA turned the rehabilitation and transference program into a
rehabilitation and modernization program for irrigation districts; furthermore,
it implemented the Parcel Development Program to consolidate and complete the
transfers, in addition to increasing crop yields and productivity.
The transference started with an aggressive outreach campaign to inform
users of its significance, the rights and obligations they acquired, and the
importance of having an irrigation fee that was adequate to cover the
districts operation, conservation and management costs. Concurrently, there
was a need to develop and approve a new National Water Law that clearly defined
the provisions that enable the federal authorities to grant concessions for the
use of water and infrastructure to water users associations.
Users have accepted the transference by receiving the infrastructure as
it was and committing to pay irrigation fees, while CNA pledged to support them
in rehabilitating the irrigation districts.
Organized users demand greater participation in the identification,
selection and implementation of irrigation districts technological
improvements. In order to address this and support the consolidation of user
associations, CNA implemented programs for Rehabilitation and Modernization as
well as Parcel Development, where users become involved with investments. Thus,
in this particular case, the project is in line with modernization and
development plans that have already been established.
The project is directly linked to regional water plans such as the Great
Vision Water Plan for the State of Chihuahua [Programa Hidráulico de Gran
Visión del Estado de Chihuahua].
The plans objectives identify the need to protect and conserve water
and the environment, as well as to contribute to the economic development and
production of food, addressing the agricultural sectors water demands while
improving the quality of water. Thus, the plan itself proposes the following
goals:
Modernize agricultural
activities. Increased conveyance and application efficiencies are proposed for
irrigation districts.
It must be noted that in the
Conchos River area, due to the scarcity of water, development programs must be
adapted according to water availability, so promoting an increased water flow
will result in better opportunities for development.
Finally, the area responsible for the project within the National Water
Commission (CNA) is the Office of Coordination of Border Issues, headed by Dr. Polioptro F. Martínez Austria. Address:
Privada del Relox No. 16, 5º piso, Col.
Chimalistac, C.P. 01000, México, D.F., Telephone: (55) 54 81 11 50, (55) 54 81
11 51 and Fax (55) 54 81 11 52.
Currently, 88% of all water from the Conchos River is channeled to
agricultural activities in areas along its course. The Mexican National Water
Commission (CNA) has identified inefficient use of water as one of the main
issues in the Rio Grande river basin. CNA considers the efficiency of
agricultural practices to be low, as it is around 44% in irrigation districts.
Thus, improving the efficiency in irrigation districts will save significant
amounts of water and will make available a greater amount of water to sustain
the ecology of the Conchos and Grande Rivers.
The Delicias and Rio Florido irrigation districts use up 93% of the
total volume of water available to the three districts. Considering that
savings expected from these two irrigation districts amount to 93% of the total
amount of water used, the actions implemented in these two districts (which are
located outside of the 100-Km. border area) will have a significant impact on
water savings and will help increase the Conchos River water flow.
Irrigation district users do not have another source of income but their
land. As such, the benefit obtained by the modernization of these irrigation
structures will directly impact production and will result in an increased
income and an improved quality of life.
On the other hand, regional development may cause a greater influx of
people who would want to be employed in agricultural activities or jobs related
to established industries, commerce, transportation, and trades. With this, the
economic activity in irrigated areas will be enhanced by making residents
active participants in the areas development.
An improved quality of life form farmers in irrigated areas will also be
reflected in the development of health, education, and service programs, as
shown in Attachment 1.c.2. Demographic and Service Data for the municipalities
of Ojinaga, Delicias, Camargo, and Jiménez.
A list of pressure and state indicators was developed to establish current conditions in irrigation districts. The list of indicators is included in the Appendix to this document.
g.
Performance Indicators
Performance
indicators were identified to help improve current conditions in irrigation
districts along the Conchos River. These include:
1. Improved
irrigation systems infrastructure.
2. Improved
water flow metering in conveyance and parcel distribution lines.
3. Improvements
to irrigation districts access ways, which will improve the operation and
control of district infrastructure.
4. Modernization
of structures, which will improve water flow control in conveyance lines.
5. Improvements
to water use distribution and planning (types of crops, surface to be planted
v. water allotments)
6. Optimization
of irrigation district infrastructure operation and control.
7. Greater
flexibility for the operation of irrigation district infrastructure.
8. Revised and
updated operation and maintenance regulations for irrigation district
infrastructure. Such revision will be jointly developed by CNA and users according
to the infrastructure to be built and the characteristics of equipment to be
installed.
9. Revised user
fees to ensure that such fees adequately cover structure and equipment
operation and maintenance costs. User fees include the operation and
maintenance of major lines (reservoirs, diversion dams, primary canals),
secondary canals, and parcel distribution lines.
10. Continuity
will be provided for existing user organizations to manage and operate
irrigation districts.
11. Users and
operators will be trained in specific irrigation technologies to be implemented
in their parcels (Low-pressure like micro sprinklers, drip feeders, multiple
gates, and high-pressure systems), and in metering and control structures
operations.
12. Reduced
surface and underground water extraction rates.
Irrigation District |
Water Withdrawal Reduction Goal
(Mm3) |
Delicias |
333.91 |
Lower Río Conchos |
24.49 |
Río Florido |
36.1 |
13. Reduced
volume of water rights assigned to users according with the water savings by the
project implementation.
14. Reduced
water conveyance losses.
15. Reduced
volume of water supplied by hectare (parcel distribution)
16. Increased
water productivity $/m3.
17. Increased
land productivity, $/ha. by reducing inputs and labor costs.
18. Increased
land productivity, ton./ha., fertirrigation potentially improves some crop
yields.
19. Improved
parcel irrigation efficiency (consumptive use v. applied water)
20. Improved
overall efficiency in irrigation districts.
INCREASED
EFFICIENCY RESULTING FROM ACTIONS PROPOSED FOR IRRIGATION DISTRICTS |
|||
ACTIONS |
CURRENT* |
PROPOSED** |
INCREASE |
Canal
lining |
53 |
90 |
37 |
Piping |
53 |
90 |
37 |
Land
grading |
45 |
75 |
30 |
Pumping,
low-pressure irrigation and grading |
|
|
37 |
(*):
Estimated (**): Theoretical |
21. Land
grading.
22. Use of
better technologies for parcel irrigation. Low pressure-systems
(microsprinklers, drip irrigation, multiple gates), and high-pressure systems
(irrigation cannons).
23. Increased water
flow in the Conchos River resulting from volumes reclaimed by the
implementation of water conservation actions in irrigation districts.
24. Improved
operations in irrigation districts and reservoirs will prevent extremely high
flows and dry rivers, which will tend to standardize flows discharged to the
Conchos by the reservoirs, maintaining thus more stable flow conditions in the
river and benefiting its habitat.
25. The
implementation of better irrigation systems will promote the use of
fertirrigation to optimize the application of agrochemical substances. This
will potentially reduce agricultural returns and the incorporation of
agricultural chemicals to surface and underground bodies of water.
26. Optimizing
irrigation systems operations for conveyance, parcel distribution and parcel
irrigation, contributes to reduce electrical power use for water pumping.
27. The
information disseminated during the public review process for certification,
the revision of user fees and user training efforts, will contribute to improve
environmental awareness and promote water resource conservation in the Conchos
River basin.
h.
Observance of minimum requirements
for the project compliance of BECC sustainable development criteria.
Recommended
Minimum Requirement |
Variations
/ Exceptions |
Rationale |
1. All Projects. Two stakeholder workshops, described in
the Guidelines for Applying the Sustainable Development Criteria, must be
conducted as described, particularly regarding content, schedule, and stakeholders.
In Workshop 1, the Sponsor and stakeholders review baseline conditions and
select indicators. In Workshop 2, alternatives are ranked using the key
indicators (criteria). The workshop must include stakeholders with
bi-national representation when the potential exists for transboundary
impacts. |
The
requirement does not apply due to the projects degree of development when
received. The planning, review of alternatives, and final designs had already
been completed. |
Ensures
compliance with Principle 4 of the BECCs Sustainable Development Criteria
and promotes community development. |
2 All Projects. The worksheets provided in the Guidelines
for Sustainable Development for projects must be completed, including a
Baseline Conditions worksheet. |
The
requirement does not apply due to the projects degree of development when
received. The planning, review of alternatives, and final designs had already
been completed. |
Ensures
compliance with Principle 4 of the BECCs Sustainable Development Criteria
and promotes community development. |
3. All Projects.
Project must incorporate energy efficiency principles into the design of the
infrastructure system and facilities and provide an energy use comparison of
alternatives. Include a feasibility study1
for efficiency/ conservation and also the use of renewable energy. |
The
requirement does not apply due to the projects degree of development when
received. The planning, review of alternatives, and final designs had already
been completed. However,
the project itself implies energy savings, as detailed in performance
indicator 28. |
Ensures
compliance with Principle 3 of BECCs Sustainable Development Criteria and
addresses Institutional and Human Capacity Building subcriteria: Conformance
to Local and Regional Conservation and Development Plans and Natural Resource
Conservation. |
4. All Projects. The project shall demonstrate how it will
continually assess the infrastructure condition and performance for long-term
protection of system durability. |
The
observance of this requirement is detailed in performance indicators 8 and
10. |
Addresses
general financial sustainability issues and
the Institutional and Human Capacity Building subcriterion. |
5. All Projects. For the development and selection of
alternatives, the project must include a present worth analysis5
of each alternative and compare the cost to the affordability of the
community prior to selecting the final alternative. A part of determining affordability is to examine the user fee
that will cover capitalization, operations, and maintenance on an annual
basis relative to average household income. |
The
requirement does not apply due to the projects degree of development when
received. The planning, review of alternatives, and final designs had already
been completed. Regarding
rate structures, it is described in performance indicator 11, the observance
of this requirement. |
Addresses
general financial sustainability issues and Institutional and Human Capacity
Building and Community Development subcriteria. |
6. All Projects. Project must identify improvements to
administrative systems and equipment necessary to support long-term
effectiveness of the infrastructure improvements. Sponsor will include the cost of these improvements in the
operation and maintenance budget. |
Compliance
of this requirement is detailed in performance indicators
1,2,3,4,5,6,7,8,11,12 and 13. |
Addresses
general financial sustainability issues and the Institutional and Human
Capacity Building subcriterion. |
7. All Projects. Project implementation must include
community awareness on responsible use of resources and infrastructure (e.g.,
anti-litter, responsible water use, watershed protection, ecosystem
protection, health benefits, paying utility bills, recycling, in-house reuse,
and baseline environmental, social, and economic baseline conditions). |
Compliance
of this requirement is detailed in performance indicators 2,5,6,7,11,15,21,22
and 29. |
Ensures
adherence to Principles 1, 2, 3 and 4 of the BECCs Sustainable Development
Criteria. Addresses Institutional Capacity Building, Conformance to Local and
Regional Conservation and Development Plans, Natural Resource Conservation,
and Community Development subcriteria. |
8. Water and Wastewater. Water and wastewater projects must include
a water usage assessment, including the possibilities and need for
conservation and/or reuse. |
The
project itself is water conservation related, and the observance of this
requirement is detailed in the 29 performance indicators identified for this
project. |
Addresses
Institutional Capacity Building, Conformance to Local and Regional
Conservation and Development Plans, Natural Resource Conservation and
Community Development subcriteria. |
9. Water. The project implementation
must include training for irrigation district staff and users on the use of
the new infrastructure. |
Compliance
of this requirement is detailed in performance indicators 3 and 13. |
Addresses
general financial sustainability issues and
the Institutional and Human Capacity Building subcriterion. |
10.Water Distribution
and Wastewater Collection Systems. Treatment capacity must already be in
place or planned as part of the project being developed. |
The
requirement does not apply due to the nature of the project. |
Ensures
adherence to Principles 1, 2, and 3 of the BECCs Sustainable Development
Criteria. Addresses general human health sustainability issues, as well as
the Institutional Capacity Building, subcriterion. |
11. Water and Wastewater Pump Station and
Treatment Plant Upgrades. Prior
to completion of 30% design, the project must include an interview with the
supervising operator to obtain observations and recommendations. Sponsor must provide a copy of the
information to the BECC project manager. |
The
requirement does not apply since final designs had already been
completed. |
Ensures
compliance with Principle 4 of BECCs Sustainable Development Criteria and
addresses general technical sustainability issues, as well as the
Institutional and Human Capacity Building subcriterion. |
12. Wastewater Treatment Projects. Project shall include a preliminary
assessment on the need for industrial pretreatment. If applicable, a
pretreatment plan of action shall be prepared. |
The
requirement does not apply due to the nature of the project. Actions should
be considered to improve agrochemical compounds application practices to
reduce pollution of water bodies. |
Ensures
compliance with Principle 3 of BECCs Sustainable Development Criteria and
addresses general technical sustainability issues, as well as the
Institutional and Human Capacity Building and Natural Resource Conservation
criteria. |
13. Solid Waste. Project must include a feasibility
analysis to reduce, reuse and recycle, taking into account the size of the
community, the size of the facility, resources, and proximity to markets. |
The
requirement does not apply due to the nature of the project. |
Addresses
the Institutional and Human Capacity Building, Conformance to Local and
Regional Conservation and Development Plans, and Community Development
subcriteria. |
14. Solid Waste. New landfill projects must include
appropriate closure procedures for uncontrolled municipal dumpsites. |
The
requirement does not apply due to the nature of the project. |
Ensures
compliance with Principle 3 of BECCs Sustainable Development Criteria and
addresses the Institutional and Human Capacity Building, Conformance to Local
and Regional Conservation and Development Plans, and Natural Resource
Conservation criteria. |
[1] Reporte de la calidad del agua.- Subdirección
General de Programación, Gerencia Regional Norte, Gerencia Estatal de
Chihuahua, Comisión Nacional del Agua.