drought preparedness planning & drought response in california jeanine jones, cdwr
TRANSCRIPT
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Drought Preparedness Planning & Drought Response in California
Jeanine Jones, CDWR
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Lessons Learned from Past California Droughts
• Impacts are highly site-specific, and vary depending on the ability of water users to invest in reliability
• Shortages stem from both hydrologic & regulatory drought• Small water systems on fractured rock groundwater sources
are most at risk of public health and safety impacts• Larger urban water agencies can manage 3-4 years of
drought with minimal impacts to their customers• The greatest economic impacts of drought in California have
been associated with wildfire and forestry damages, not with urban & agricultural water uses
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Tools for Managing Drought
• California’s water infrastructure (which facilitates water transfers & exchanges)
• Groundwater• Institutional framework
for preparedness • Response actions such as
outreach & conservation
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Institutional Framework
• Historically, $billions in state funding to local agencies to improve water supply and demand management
• Urban water management planning requirements, water shortage contingency plans
• Urban & agricultural conservation planning requirements
• Statutory framework for facilitating water transfers, water recycling
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Drought Management Challenges Specific to California
• Water conveyance across the Sacramento – San Joaquin River Delta
• Ability to monitor statewide groundwater conditions and impacts of pumping (land subsidence) (because groundwater not regulated at state level)
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Broadly Shared Drought Management Challenges – Small Water Systems
• Isolated rural communities• Systems on fractured rock groundwater• Small groundwater basins w/ minimal
recharge/storage capacities• Impacted soonest and to greatest extent
by droughts, typically operate with little margin for error
• Experience actual public health & safety impacts -- lack of water for human consumption, sanitation, fire protection
• Lack SDWA’s “technical, managerial, financial” capacity
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Broadly Shared Drought Management Challenges – Drought Prediction
• NWS operational weather forecasts – out to about 10 days, good skill
• NOAA CPC outlooks for precipitation (30 days – 1 year), not skillful/useful for resource management
• Improved ISI forecasting would be hugely useful for drought management (longer lead time for reservoir ops, planning water transfers, budgeting conservation programs, etc)!
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What Can Federal Research Programs Do To Help Improve Drought Management?
• Improve ISI forecasting!!!!– Advance research on MJO and ARs; ARs play big
role in California’s water year type– Improve understanding & predictability of
decadal-scale natural variability (high priority for Colorado River Basin)
– Expand weather/climate monitoring to support week 3/week 4 WX forecasts
• NASA – timely provide satellite-based InSAR observations (e.g., DESDynI mission) that allow monitoring of land subsidence due to groundwater extraction
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