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Pages 114-119

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From page 114...
... 114 Coping with Drought John Letey GENERAL CONCEPTS Semiarid regions of the world typically have wide variations in annual precipitation amounts. The maximums and minimums can differ greatly from the long-term average.
From page 115...
... COPING WITH DROUGHT 115 The users of water can be broadly categorized into three groups: urban, agricultural, and fish and wildlife. Very efficient water resource management, which is particularly critical during a drought period, depends upon willingness and opportunity for these three user groups to cooperate.
From page 116...
... 116 WATER CONSERVATION, REUSE, AND RECYCLING California State Drought Water Bank California experienced a drought between 1987 and 1992. An emergency state drought water bank was established in 1991 under the direction of the California Department of Water Resources (DWR)
From page 117...
... COPING WITH DROUGHT 117 of perennial surface streams in the district required that all irrigation water be obtained from groundwater reserves. As a result, considerable groundwater overdraft occurred.
From page 118...
... 118 WATER CONSERVATION, REUSE, AND RECYCLING water of unsatisfactory quality. In addition, the build-up of the water table has resulted in reduction in subsurface inflow from neighboring areas and a significant improvement in both groundwater depth and water quality for those irrigators in the district who continue to rely on groundwater.
From page 119...
... COPING WITH DROUGHT 119 CONCLUSIONS The case studies presented from California illustrate the benefits of water storage from wet years to partially offset deficiencies during drought years. They also represent cooperative, mutually beneficial arrangements between the urban and agriculture sectors.

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