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WSP12525
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Last modified
1/26/2010 4:16:28 PM
Creation date
7/30/2007 9:35:38 AM
Metadata
Fields
Template:
Water Supply Protection
File Number
8282.400
Description
Colorado River Operations and Accounting - Deliveries to Mexico
State
CO
Basin
Colorado Mainstem
Water Division
5
Date
6/1/2002
Author
Seven Basin States
Title
Summary of Water Resources in Northern Mexico - Seven Basin States Ad Hoc Committee - 06-01-02
Water Supply Pro - Doc Type
Report/Study
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<br />O-:lJ''''''' <br />U {t:.J J <br />Summary of Water Resources in Northern Mexico . <br /> <br />Flows to the Colorado River Delta, Cieneea de Santa Clara, and the Salton Sea <br />· Colorado River water (surface water and groundwater) that is not consumed by irrigated crops, <br />evapotranspiration in the Mexicali and San Luis Valleys, or municipal and industrial users in <br />San Luis-RioColorado, Mexicali, Tecate, an Tijuana-Rosarito eventually flows to the Cienega <br />de Santa Clara, Colorado River Delta, or the Salton Sea. <br /> <br />Cienega de Santa Clara <br />· Drainage from irrigated lands in the San Luis Valley flows to the Riito Drain which flows to the <br />Cienega de Santa Clara. Approximately 25,000 AFY flows from the Riito Drain to the Cienega. <br /> <br />· The primary source of water flowing to the Cienega is the drainage water from the Wellton- <br />Mohawk Irrigation and Drainage District. The drainage from WMIDD is routed by a lined <br />canal approximately 37 miles from the SIB to the Cienega. <br /> <br />· The average annual discharge from the WMIDD bypass drain for the period 1990-2001 IS <br />107,700 AFY. <br /> <br />Colorado River Delta <br />· The sources of Colorado River water that flows into the delta region include Colorado River <br />flows not diverted at Morelos Dam, municipal/industrial wastewater and sewage effluent from <br />San Luis-Rio Colorado, and agricultural drainage from southern Mexicali Valley that flows to <br />the delta via the Rio Pescaderos and Rio Hardy. <br /> <br />· The combined estimated mean annual flow of agricultural drainage to the delta region from the <br />Rio Pescaderos and Rio Hardy is approximately 70,000 AF. <br /> <br />Table 3. Principal Flows to the Colorado River below Morelos Dam (AF) <br /> <br />Year <br /> <br />Diversion at Excess to <br />CR Delta/2 <br /> <br />Irrigation Drainage <br />Rio <br />Pescaderos <br /> <br />ota <br />Estimated <br />Flow'4 <br /> <br /> <br />IBWC <br />/2 Calculated as difference between "U.S. Delivery at NIB" and "Diversion at Morelos Dam"; <br />13 Estimated mean annual discharge to Colorado River (Pacific Institute, 200 I) <br />14 Estimate does not include accruals due to unmeasured returns of agricultural drainage to the Colorado River or losses <br />by ET or seepage <br /> <br />Page 9 of 10 <br /> <br />Seven Basin States June 1,2002 <br />
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