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USBR/MWD SALINITY MANAGEMENT STUDY FINAL REPORT w OJ o W is provided. However, annual Federal funding, which supports about 70 percent of the program activities, has declined from about $50 million in 1992 to $14 million in 1997 (se Figure 3-1). . SWP OPERATIONAL CHANGE DWR could develop the capability to forecast salinity levels for the SWP to make operational decisions regarding salinity, as well as to provide forecasts of expected salinity at Metropolitans delivery points. The forecasts would provide critical information for Metropolitans blending and other salinity management operational decisions. DWR could also develop the ability to quantitatively assess the salinity impacts of various actions and projects that could affect SWP salinity levels. It would be advantageous to Metropolitan if DWR placed greater emphasis on salinity outcomes in its SWP operating decisions. For example, preliminary studies estimate a 10 to 30 mgfL reduction in SWP salinity levels could be achieved by selective shifting of Central Valley Project (CVP) pumping at the Tracy Pumping Plant to the Banks Pumping Plant to minimize commingling of CVP water at ONeill Forebay or San Luis Reservoir. This nonstructural action would potentially reduce the influence of higher salinity CVP water, but 0 may be constrained by or conflict with fish-take, contractual, operational, and water rights e issues. It will be important, however, to encourage and promote DWR activity of this nature, when feasible. CALFED BAY-DELTA PROGRAM CALFED is a group of state and federal agencies 0 working together with management and regulatory responsibility in the Bay-Delta Estuary, that will provide policy direction and oversight for the CALFED Bay-Delta Program. The CALFED process offers an opportunity for significant reductions in SWP TDS by improving conveyance capacity to deliver low salinity water from the Sacramento River to the Banks Pumping Plant. Depending upon the conveyance features and operating criteria implemented, there is potential to reduce average SWP salinity by 100 mgfL. Figure3-2 shows estimated ranges of monthly averaged IDS values under various alternatives being considered in the recently issued progranunatic environmental document. e BOOKMAN-EDMONSTON ENGINEERING, INC. 3.4 O:\lOCALRESIANDYSISALlNITYlJUNE98-2\7SECnDOC 07/20/9810:59 AM Section 3 Evaluation of Potential Regional Salinity Management Strategies