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Water and the Future of the San Joaquin Valley

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2021-9-26 published at News & Reports category

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1.Policy Priorities for California’sWater Management April 25, 2019 Water Resources and Policy Initiatives Annual Conference Chico, California Alvar Escriva-Bou, Research Fellow
2.Outline 2 California Water: the Big Picture Policy priorities for California’s water management
3.California’s highly variable climate requires preparing for extremes 3 SOURCE: Western Regional Climate Center. Bars show inches above/below statewide average precipitation for 1980-2000 (23.8 inches) based on water year (October–September).
4.20th century legacy: a highly engineered water system… 4
5.….and a very complex water rights system 5 Surface water rights Riparian (English common law) Pre-1914 appropriative (mining law) Post-1914 appropriative (state permits) Groundwater rights Mostly common law Limited state oversight
6.Who uses water in California? 6 Cities: 10% of water use, 98% of economy Farms: 40% of water use, 2% of economy Ecosystems: 50% of available water, and performing poorly SOURCE: Dept. of Water Resources (1998-2015 average) Environment 50%
7.Much variation in water use across regions, years 7 SOURCE: Dept. of Water Resources (1998-2015 average)
8.Total human water use has been declining, but economy has been growing 8 SOURCE: Hanak et al., Water and the California Economy (PPIC, 2012), updated to 2010 with data from the Department of Water Resources, the Department of Finance, and the U.S. Bureau of Economic Analysis.
9.Local agencies raise most of the >$30 billion spent annually on water 9
10.Too many Californians lack access to safe and reliable drinking water sources 10
11.Groundwater is a vital component of California’s water supply, but is overused in some parts of the state 11 On average, underground aquifers provide nearly 40% of the water used in California’s Oversight of groundwater use has been minimal Consequences are dry wells, sinking lands, reduced supplies for droughts Groundwater pumping is depleting reserves in California
12.Changing climate is affecting water management 12 Warming temperatures Shrinking snowpack Rising seas More volatile precipitation Shorter wet seasons
13.Outline 13 California Water: the Big Picture Policy priorities for California’s water management
14.A roadmap of water priorities for California 14 Ensure clean and reliable water supplies Provide safe drinking water to underserved communities Strengthen portfolio to manage drought and floods Bring groundwater basins into balance Improve capacity to store water by managing “the water grid” Enhance the environment Innovate to protect natural habitats Increased urgency for new approaches in headwaters Tackle problems in key watersheds Big decisions ahead on supply, environment in Colorado River, the Salton Sea, and the Delta
15.Provide safe drinking water to underserved communities 15 Identify durable funding sources Support cost-effective solutions Develop programs to mitigate the risk of drinking-water wells during droughts
16.Strengthen “portfolio” to manage droughts and floods 16 Diversify supplies Recycled water, stormwater capture, desalination,… Manage demand Expand water trading Modernize governance Rates, codes, regulations, measurement Provide technical support for local decision-making Anaheim Lake, a groundwater recharge basin
17.Cooperation and flexibility will be key in implementing the Sustainable Groundwater Management Act 17 SGMA directs local agencies to plan for groundwater sustainability, avoiding 6 undesirable results Most basins must adopt plans by 2020, achieve sustainability by 2040 Impacts will vary across the region Trading and recharge will reduce transition costs significantly
18.Managing California’s water grid will lower risks against droughts and climate impacts 18 Most California water supply and use is a part of a connected network of surface storage, conveyance and groundwater facilities Solutions to groundwater sustainability issues should, where appropriate, incorporate the “grid” Re-operating the system to increase recharge and water trading is key
19.Innovate to protect natural habitats 19 Focus on projects that bring multiple benefits to multiple species Promote watershed-scale planning to build ecosystem health Adopt ecosystem water budgets for main watersheds Create more reliable sources of funding
20.Make forest health a top priority for management 20 Expand pace and scale of treatments (managed fire, mechanical thinning) to rebuild forest health Improve accounting of forests at risk, treatments used Malheur National Forest, Oregon
21.The Delta, the Salton Sea, and the Colorado River: Unsolvable Problems? 21 Cooperative agreements are key for durable solutions Examples exist in California: Yuba Accord, Putah Creek Accord Source: Krista Diamond, Rootsrated(https://rootsrated.com/stories/why-the-salton-sea-is-the-most-important-lake-you-ve-never-visited)
22.If you want to know more… 22 Escriva-Bou et al. 2016. Accounting for California’s Water. Public Policy Institute of California. Gray et al. 2015. Allocating California’s Water. Public Policy Institute of California. Hanak et al. 2019. Water and the Future of the San Joaquin Valley. Public Policy Institute of California. Hanak et al. 2018. Replenishing groundwater in the San Joaquin Valley. Public Policy Institute of California. Hanak et al. 2014. Paying for Water in California. Public Policy Institute of California. Mount et al. 2018. Managing Drought in a Changing Climate: Four Essential Reforms. Public Policy Institute of California. Mount et al. 2017. Managing California’s Freshwater Ecosystems: Lessons from the 2012-16 Drought. Public Policy Institute of California. Van Butsic et al. 2017. Improving the Health of California’s Headwater Forests. Public Policy Institute of California. …
23.Thank you 23
24.Notes on the use of these slides These slides were created to accompany a presentation. They do not include full documentation of sources, data samples, methods, and interpretations. To avoid misinterpretations, please contact: Alvar Escriva-Bou escriva@ppic.org 916 - 440 -1125 @AlvarEscriva Thank you for your interest in this work.

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