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Reduced Reliance on the Delta
<br />THE CITY OF
<br />rL£ASANTON®
<br />Table 4. Calculation of Reliance on Water Supplies from the Delta Watershed (DWR Table C-4)
<br />Water Supplies from the Delta Watershed
<br />Baseline
<br />(Acre -Feet)
<br />(2010)
<br />CVP/SWP Contract Supplies
<br />10,728
<br />Delta/Delta Tributary Diversions
<br />Transfers and Exchanges
<br />Water Use Efficiency
<br />Other Water Supplies from the Delta
<br />2015
<br />Watershed
<br />2025
<br />Total Water Suppl ies from the Delta
<br />2035
<br />Watershed
<br />10,728
<br />2015 2020 2025 2030 2035 2040 2045
<br />(Optional)
<br />6,942 7,386 10,702 9,619 9,665 9,918 9,918
<br />6,942 1 7,386 1 10,702 1 9,619 1 9,665 1 9,918 1 9,918
<br />Service Area Water Demands without
<br />Watershed Baseline
<br />Water Use Efficiency
<br />Baseline
<br />1
<br />2015
<br />2020
<br />2025
<br />2030
<br />2035
<br />2040
<br />2045
<br />(Optional)
<br />(Optional)
<br />(Acre -Feet)
<br />(2010)
<br />Water Supplies from the Delta Watershed 10,728
<br />6,942
<br />7,386
<br />10,702
<br />9,619
<br />9,665
<br />9,918
<br />9,918
<br />Service Area Water Demands without
<br />Water Use Efficiency Accounted For
<br />1 16,131
<br />16,811
<br />20,543
<br />21,594
<br />22,932
<br />24,036
<br />25,290
<br />25,290
<br />Change in Supplies from the Delta
<br />Watershed Baseline
<br />2015
<br />2020
<br />2025
<br />2030
<br />2035
<br />2040
<br />2045
<br />(Acre -Feet) (2010)
<br />(Optional)
<br />Water Supplies from the Delta Watershed 10,728
<br />6,942
<br />7,386
<br />10,702
<br />9,619
<br />9,665
<br />9,918
<br />9,918
<br />Change in Water Supplies from the Delta
<br />Watershed
<br />(3,786)
<br />(3,342)
<br />(26)
<br />(1,110)
<br />(1,063)
<br />(810)
<br />(810)
<br />Percent Change in Supplies from the Delta
<br />Watershed
<br />Baseline
<br />2015
<br />2020
<br />2025
<br />2030
<br />2035
<br />2040
<br />2045
<br />(Asa Percent of Demand w/out WUE)
<br />(2010)
<br />(Optional)
<br />Percent of Water Supplies from the Delta
<br />Watershed
<br />66.5%
<br />41.3%
<br />36.0%
<br />49.6%
<br />41.9%
<br />40.2%
<br />39.2%
<br />39.2%
<br />Change in Percent of Water Supplies from
<br />the Delta Watershed
<br />-25.2%
<br />-30.5%
<br />-16.9%
<br />-24.6%
<br />-26.3%
<br />-27.3%
<br />-27.3%
<br />3.0 EXPECTED OUTCOMES FOR REDUCED RELIANCE ON THE DELTA
<br />As stated in WR P1(c)(1)(C), commencing in 2015, UWMPs are required to include expected outcomes for
<br />measurable reduction in Delta reliance and improved regional self-reliance. WR P1 further states that
<br />those outcomes shall be reported in the UWMP as the reduction in the amount or percentage of water
<br />used from the Delta.
<br />The following provides a summary of the near-term (2025) and long-term (2045) expected outcomes for
<br />the City's Delta reliance and regional self-reliance based on the assumptions described in the previous
<br />section and DWR's analysis tool. The results show that the City is measurably reducing reliance on the
<br />Delta and improving regional self-reliance, based on the percentage of the City's water supplies from the
<br />Delta watershed.
<br />Expected Outcomes for Regional Self -Reliance:
<br />• Near-term (2025) - Normal water year regional self-reliance is expected to increase by
<br />approximately 4,800 AFY from the 2010 baseline. Water use efficiency is a major contributor
<br />to this increase, supplemented by recycled water.
<br />• Long-term (2045) - Normal water year regional self-reliance is expected to increase by
<br />approximately 7,000 AFY from the 2010 baseline. Water use efficiency is a major contributor
<br />to this increase, supplemented by recycled water.
<br />5
<br />City of Pleasanton
<br />Last Revised: 05-05-21
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