water talks: new challenges, new supplies
DESCRIPTION
Overview presentation by Board Chair Michael T. Hogan at Water Talks: New Challenges, New Supplies on September 13, 2011.TRANSCRIPT
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Water Authority Board Chair Michael T. Hogan
September 13, 20111
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Toby Roy◦ Overview of local supply mix
Cathy Pieroni◦ San Diego’s water purification efforts
Bob Yamada◦ Regional seawater desalination
Q & A after each presentation
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LAKESHASTA
LAKEOROVILLE
State Water Project(Bay-Delta)
20%Colorado River
50%
Local Supplies and Conservation
30%
San Diego County imports ~70% of its water supply
*Estimated3
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Regulatory
restrictions
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Delta Smelt
Longfin Smelt
Chinook Salmon
Central Valley Steelhead
Green Sturgeon
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Regulatory
restrictions
Drought/climate
change
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Lake Mead on Colorado River showing “bathtub ring” signifying low water levels.
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Regulatory
restrictions
Drought/climate
change
Increasing
demand/limited
supply
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Downtown Phoenix
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Regulatory
restrictions
Drought/climate
change
Increasing
demand/limited
supply
Rising costs7
2004 Bay-Delta levee break
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2011(estimated)1991
552 TAF (95%)
26 TAF (5%)
Total = 578 TAF
20 TAF(3%)
285 TAF (47%)
80 TAF (13%)
72 TAF (12%)
75 TAF (12%)
28 TAF (5%)
51 TAF(8%)
Total = 611 TAF
Metropolitan Water District
Imperial Irrigation District Transfer
All American & Coachella Canal Lining
Seawater Desalination
Local Surface Water
Recycled Water
Groundwater
Conservation (existing and additional)
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TAF = Thousand acre-feet
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San Diego County Average: 10-15 inches per year
Arid Climate of the Southwest
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Areas of Abundant Groundwater Resources
San Diego Area Groundwater
Resources Are Small
Southern California Groundwater Basins
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231 TAF (30%)
80 TAF (10%)
27 TAF (4%)
48 TAF (6%)
56 TAF (7%)
44 TAF (6%)
103 TAF (13%)
190 TAF (24%)
Total = 779 TAF (thousand acre-feet)
Metropolitan Water District
Imperial Irrigation District Transfer
All American & Coachella Canal Lining
Seawater Desalination
Local Surface Water
Recycled Water
Groundwater
Conservation (existing and additional)
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Visit our website: sdcwa.org
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