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WSP12980
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Last modified
1/26/2010 4:34:27 PM
Creation date
3/31/2008 12:06:42 PM
Metadata
Fields
Template:
Water Supply Protection
File Number
8210.140.20.C
Description
Imperial Irrigation District (IID);
State
CA
Basin
Colorado Mainstem
Date
1/9/1996
Author
Imperial Irrigation District
Title
Water Requirements and Availability Sutdy (draft)
Water Supply Pro - Doc Type
Publication
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<br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I. <br />I <br />I <br />I <br /> <br />much as 85,000 additional acre-feet of savings. Annual water savings for these projects range <br />from 101,200 acre-feet to 237,224 acre-feet, depending upon the conservation project and <br />management or scheduling level utilized. Irrigation water management includes irrigation <br />scheduling to determine how much water to apply and when, irrigation event evaluations and <br />increased management effort to use water more efficiently. Irrigation scheduling methods <br />include soil-water balance models, infrared thermometers, experience and combinations of these <br />methods. Every grower's irrigation water management is unique and depends on the set of <br />constraints and incentives that exist for an individual operation. <br /> <br />In order to fully realize the conservation potential of additional delivery flexibility, the <br />construction of additional regulating reservoirs and/or multi-purpose interceptors may be <br />necessary due to the resulting increase of flows returned to the District's distribution system <br />(return flows). Without the addition of reservoirs or interceptors, the increased return flows <br />could ultimately end up as operational discharge to the drainage system. The run-time changes <br />will require the hiring and training of additional District staff, but this could be timed to occur in <br />stages as facilities become operational. As such, a timeline of six to eight years is estimated for <br />the completion of this project. The disadvantages of this project for the water user involve <br />removing active land from production and the necessity of raising on-farm management levels. <br />District rules and operating procedures would have to be modified due to the increases in staffmg <br />and operational requirements that added flexibility would demand. <br /> <br />For both the 6-hour and on-demand deliveries, zanjeros would be needed around-the-clock. <br />While the 24-hour coverage would increase staff size, zanjeros would be able to cover larger <br />areas on their shifts as fewer order changes would result from the added flexibility. An <br />additional 6 assistant supervisors, 18 hydrographers, 1 chief hydrographer, and 88 zanjeros <br />would be needed for the 6.;.hour delivery program. These personnel increases are expected to <br />double if an on-demand delivery system is implemented. <br /> <br />Draft: Subject To Revision 12/21/95 <br /> <br />41 <br />
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