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<br />o <br />o <br />i-'-..l <br />l+""" <br />!, .io <br />O? <br /> <br />DRAFT 2/11/03 <br />CONFIDENTIAL AND PRIVILEGED INFORMATION <br /> <br />BROAD BRUSH CONCEPT DOCUMENT <br /> <br />MEXICAN WATER SUPPLIES FOR THE COLORADO RIVER DELTA <br />(Riparian Corridor, La Cienega De Santa Clara, Brackish & Intertidal Wetlands) <br /> <br />Location of Supply Options Minimum Sustained Flow for <br />Supply For Overall Water Riparian Corridor andlor Other Periodic Pulse/Flushing Comments Quantity of Cost Pros & Cons <br />Option Management Plan Environmental Needs Flows andlor Cienega Needs Water <br />Action <br />1.5 mafTreaty Deliveries, 1.7 mafTreaty Deliveries, aDd Flood Flows Scenarios <br />Mexico Groundwater storage and Dedicated Treaty deliveries and Periodic higher seasonal river Groundwater replenishment and Pro- Provides for more effective use of Mexico's <br /> conjunctive use / integrated flood flows for environmental corridor flows with corresponding recovery- surplus Treaty deliveries available water resources to meet its demands <br /> surface water and groundwater purposes. Increased groundwater coordinated increase in Mexican and Colorado River and Gila Con- Funding problems: capital investments and <br /> operations pumping to offset any reduced groundwater pumping to offset River flood flows (surplus water <br /> Treaty deliveries for economic any reduced Treaty deliveries for management plan) ongoing O&M; Groundwater yields already <br /> allocated; potential salinity build-up in <br /> purposes economic purposes Would likely require Mexico's i groundwater due to redirecti on of flood flows for <br /> development of a regional water environmental purposes; potential trans border <br /> quantity and quality management I groundwater issues; environmental operations <br /> plan, coordinated operations plan, may be difficult to fund and enforce <br /> water allocations for the <br /> environment <br />Mexico Water Conservation- Onfano Better quality conserved water for Conserved water piggybacking on Request potential North American On-farm On-farm Pro- There are large system losses and significant <br /> and System Efficiencies environmental purposes to replace, other water sources to meet total Development Bank grant 20-40 kaf $15-25 million opportunities to conserve water. Permanent water <br /> Improvements if needed, existing poor quality pulse flow or economic needs financing for border infrastructure System System source for environmental purposes, flexibility of <br /> drainage water efficiencies efficiencies scheduling delivery. <br /> 20-40 kaf $15-25 million Con- Funding problems: capital investments and <br /> ongoing O&M. Verification issues, and <br /> (USBR, 1991)" (USBR,1991) competition for water right concession; possibly <br /> reduced flows to the Salton Sea, accelerating <br /> increase in Sea salinity <br /> <br />. "Water Project Initiatives for Mexico", Lower Colorado Region Bureau of Reclamation, August 29,1991. <br /> <br />DRAFT-Confidential and Privileged Information <br /> <br />Page I <br />