WSP12980

• 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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management is unique and depends on the set of constraints and incentives which exist for an
individual operation.

Thus, while water users in the Imperial Valley are generally doing a good job of irrigation water
management, there may be room for improvement. An irrigation water management program
could be implemented in a short time period (within six months), but would need to continue for
the duration of any proposed transfer in order to gain water user confidence and maintain
continued improvements. Such a program would need to meet grower requirements in that land
would not be taken out of production or that cropping patterns would still be at the discretion of
the growers. Growers will not accept any program that dictates how to irrigate or farm.

An irrigation water management program would not affect existing lID operating rules.
However, the program has the potential to affect lID operations; because, as irrigation scheduling
improves, lID's standard 24-hour delivery may not have enough flexibility to meet a grower's
flow rate and total volume requirement.

IV.C Urban Conservation
Within the southwestern portion of the United States, urban water conservation has become a
very important issue. The overdraft of groundwater and continuing droughts experienced by
many cities have resulted in the implementation of water conservation programs designed to
reduce M&I consumptive use. Conservation programs have ranged from the subsidy of low-flow
shower and toilet fixtures to the implementation of xeriscape landscaping practices.

Because of the readily available supply of Colorado River water to the lID, water conservation is
not a priority issue for most cities withiIl the District. In 1994, the gallons per capita per day
(GPCD) for the cities within the District ranged from 212 to 806.

Table IV.C-l presents the projected water use for the cities within the District in the year 2045
based on their 1994 GPCD.

Draft: Subject To Revision 1/2/96

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