Event Briefing Slides – Priorities for California’s Water
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string(4816) "Priorities for California’s Water October 26, 2017 Ellen Hanak Supported with funding from the annual sponsors of the PPIC Water Policy Center State’s highly variable climate was on display this year Oroville Dam spillway failure 5-year drought ended, but had some lasting impacts – Lowered groundwater levels, stressed freshwater species Near record precipitation – Stressed dams, levees – Added more fuel to fire-prone landscapes 2 A road map of water priorities for California Ensure clean and reliable water supplies – State must improve capacity to store water, manage demands, provide safe drinking water to underserved communities Enhance the environment – Health crisis in freshwater ecosystems and headwater forests highlights need for new approaches Tackle problems in key watersheds – Big decisions lie ahead on supply, environment for Colorado River and Sacramento‒San Joaquin Delta 3 Outline Ensure clean and reliable water supplies Enhance the natural environment Tackle problems in key watersheds 4 Changing climate will affect snowpack, floods, drought State’s dams designed, operated for past climate patterns Systems inadequate for recharging aquifers in wet years Folsom reservoir in drought Oroville Dam spillway, 2017 5 California needs forward-looking storage management Manage surface and groundwater together Remove barriers to groundwater recharge Evaluate, modernize dams to adapt to changing climate Rising temperatures will shrink Sierra snowpack Source: Cayan et al. 2016 6 Managing demand can improve supply reliability Plan ahead for urban supply shortages – Balance short-term conservation and long-term efficiency Manage agricultural demand – Reducing groundwater overdraft will require better accounting, basin-scale approaches Make it easier to trade water – Process is too complex, especially for short-term drought-related trades 7 All Californians deserve safe drinking water Several hundred small systems unable to provide safe drinking water – Improve estimates of population at risk – Prioritize support for underserved communities – Protect and mitigate dry wells during droughts East Porterville gets safe drinking water 8 Outline Ensure clean and reliable water supplies Enhance the natural environment Tackle problems in key watersheds 9 Headwater forests are overly dense, in poor health Recent tree die-off in Sierra headwaters More small trees, fewer large ones Latest drought effects: – 15 million more dead trees per year, most from beetle outbreak – Two of largest wildfires in state history Forest benefits at risk 10 Forest health should be a top priority for management Expand pace and scale of treatments (managed fire, mechanical thinning) Improve accounting of at-risk forests, treatments used Offset costs by bundling harvest with other treatments Use new collaborative tools Malheur National Forest, Oregon 11 Troubled freshwater ecosystems need more reliable protection, better water management Promote projects that benefit people and nature Develop watershed-scale plans to build ecosystem health Adopt ecosystem water budgets for key watersheds Create more reliable sources of funding 12 Outline Ensure clean and reliable water supplies Enhance the natural environment Tackle problems in key watersheds 13 Difficult decisions lie ahead for two key watersheds Over-allocation, drought affects Colorado River basin — a major water supply for Southern California Reliability of Delta water supply at risk from climate change, levee failures Complex environmental problems affect both basins 14 Collaboration is key to Colorado River solutions Work with other states to foster flexible solutions, avoid mandatory water cuts Support implementation of agreement with Mexico Build momentum for addressing health and environment concerns at Salton Sea Hoover Dam in drought 15 The Delta is a complex, enduring water challenge It’s time to decide: what is the future of Delta water supply? With or without tunnels project, priorities include: – Changing focus from species to ecosystems – Adopting comprehensive plan for Delta levees The Sacramento–San Joaquin Delta 16 Thank you! 17 About 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: Ellen Hanak (hanak@ppic.org, 415-291-4433) Thank you for your interest in this work. Priorities for California’s Water October 26, 2017 Ellen Hanak Supported with funding from the annual sponsors of the PPIC Water Policy Center 19"
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