Surface Water Supplies

Transcription

1 Status Report: Salinas Valley Ground Water and SVWP UCCE Irrigation and Nutrient Management Meeting February 24, 2009

2 Presentation Salinas Valley Ground Water Where does ground water come from? Ground-water Basins Cross-Section of the SV Current Ground water Levels Salinas Valley Water Project Update Why build it? Nacimiento Spillway Modification Salinas River Diversion i Facility

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4 Surface Water Supplies of Monterey County Average Annual Outflow: 100, AF Average Annual Outflow: 250,000 AF Average Annual Outflow: 60,000 AF

5 Ground water Basins

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8 Cross Section of the Salinas Valley

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10 -20.0 HISTORIC GROUND WATER TRENDS PRESSURE AREA-180 FOOT AQUIFER 5 Wells Av verage Depth to Wa ater, in feet OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP Month 1985 WY 1991 WY WY 2008 WY 2009

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12 -20.0 HISTORIC GROUND WATER TRENDS PRESSURE AREA-400 FOOT AQUIFER 11 Wells Avera age Depth to Wate er, in feet OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP Month 1985WY 1991WY WY 2008 WY 2009

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14 -95.0 HISTORIC GROUND WATER TRENDS EAST SIDE AREA 11 Wells ter, in feet Aver rage Depth to Wa OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP Month 1985 WY 1991 WY WY 2008 WY 2009

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16 -50.0 HISTORIC GROUND WATER TRENDS FOREBAY AREA 10 Wells Aver rage Depth to Wa ater, in feet OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP Month 1985 WY 1991WY 2008 WY 2009 WY

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18 -30.0 HISTORIC GROUND WATER TRENDS UPPER VALLEY AREA 9 Wells Avera age Depth to Wat ter, in feet OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP Month 1985WY 1991WY WY 2008 WY 2009

19 SALINAS VALLEY GROUND WATER LEVELS Annual Averages The "0" point represents the 1944 WY when the DWR conducted the first water level survey in the Salinas Valley Ch hange in Feet Nacimiento Recharge Began San Antonio Recharge Began Water Year Pressure East Side Forebay Upper Valley

20 Presentation Salinas Valley Ground Water Where does ground water come from? Ground-water Basins Cross-Section of the SV Current Ground water Levels Salinas Valley Water Project Update Why build it? Nacimiento Spillway Modification Salinas River Diversion i Facility

21 Cross Section of the Salinas Valley

22 Cross Section near the Coast 180 Ft. Aquifer 400 Ft. Aquifer Deep Aquifer

23 Why Build It? SWI Front Pressure 180-Foot Aquifer Source: MCWRA Date: May 2006 Note: The scale and configuration of all information shown hereon are approximate and are not intended as a guide for design or survey work.

24 Why Build It? (cont.) SWI Front Pressure 400-Foot Aquifer Source: MCWRA Date: May 2006 Note: The scale and configuration of all information shown hereon are approximate and are not intended as a guide for design or survey work.

25 Why Build It? (cont.) SWI Solution Strategy: Develop a surface water source Move water north to reduce coastal pumping Stop pumping along the coast Agency has implemented the following: Nacimiento and San Antonio Reservoirs Monterey County Water Recycling Projects Salinas Valley Water Project

26 Why Build It? (cont.) San Antonio Reservoir Completed in 1967 Lake Capacity 335,000 AF Nacimiento Reservoir Completed in 1957 Lake Capacity 377,900 AF

27 Why Build It? (cont.) Salinas Castroville Monterey Bay MC Water Recycling Projects

28 Why Build It? (cont.) Salinas Valley Water Project Nacimiento Spillway Modification Salinas River Diversion Facility

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31 Sister wall reinforcement

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35 Left Bank Excavation

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37 Summary Salinas Valley Ground Water Where does ground water come from? Ground-water Basins Current Ground water Levels Salinas Valley Water Project Update Why it was built? Nacimiento i Spillway Modification i Salinas River Diversion Facility

38 Contact Information o Monterey County Water Resources Agency 893 Blanco Circle Robert Johnson Chief of Water Resources Planning johnsonr@co.monterey.ca.us

39 Questions?

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41 The water came in a thirty-year cycle. There would be five to six wet and wonderful years when there might be nineteen to twenty-five inches of rain, and the land would shout with grass. Then would come six or seven pretty good years of twelve to sixteen inches of rain. And then the dry years would come And it never failed that during the dry years the people forgot about the rich years, and during the wet years they lost all memory of the dry years. It was always that way. John Steinbeck, East of Eden

42 January 1, 1995 Pressure 180-Foot Aquifer No Pumping / No New Wells No New Wells