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For the purposes of augmentation plans, two methods are generally used to determine the amount <br /> of stream depletion caused by well pumping: 1. crop potential consumptive or 2. presumed <br /> depletive factor. The crop potential consumptive method involves determining the potential crop <br /> consumptive use for the land irrigated by the wells in the plan. Any available surface water is <br /> subtracted from the potential consumptive use and the remainder is assumed to be the stream <br /> depletion caused by wells. This method was commonly used prior to 2003 but is not generally <br /> used in recent augmentation plans. The second and currently most commonly used method for <br /> estimating stream depletion is the presumed depletive factor(PDF). In this method, well volume <br /> is recorded or calculated and a specified percentage of that pumping is assumed to be <br /> consumptively used by the crop depending upon irrigation method (and hence the streamflow <br /> depletive amount). In most plans, sprinkler irrigation is assumed to have an 80% PDF and <br /> surface irrigation is assumed to have a 60% PDF. <br /> Table 2. High Capacity Irrigation Well Count in Hydrobase by Water District in Division 1 <br /> Before and After Adjudication of the 2010 Abandonment List. <br /> Wells Wells <br /> Water Needing Needing Coffin Wells Total Wells <br /> District Augmentation Augmentation After 2010 <br /> Before 2010 After 2010 <br /> WD 01 2279 2092 236 2328 <br /> WD 02 1939 1613 0 1613 <br /> WD 03 800 695 211 906 <br /> WD 04 112 77 0 77 <br /> WD 05 82 48 0 48 <br /> WD 06 91 25 0 25 <br /> WD 07 156 132 0 132 <br /> WD 08 591 456 0 456 <br /> WD 09 31 26 0 26 <br /> WD 23 24 24 0 24 <br /> WD 48 0 0 0 0 <br /> WD 49 4 4 0 4 <br /> WD 64 980 944 0 944 <br /> WD 65 0 0 0 0 <br /> WD 76 0 0 0 0 <br /> WD 80 13 12 0 12 <br /> Total for 7102 6148 447 6595 <br /> Div. 1 <br /> 48 <br />