Making Climate Assessments Work Learning from California and Other Subnational Climate Assessments: Proceedings of a Workshop (2019) / Chapter Skim
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2 California's Changing Climate and Precipitation Patterns and Their Implications for Water Management
2 California's Changing Climate and Precipitation Patterns and Their Implications for Water Management
Pages 5-11
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From page 5... ...
described his experience managing Oroville Reservoir and Lake Mendocino through major precipitation events called atmospheric rivers that are projected to become more common, posing both a flood risk as well as a large potential source of water if system managers can adapt.
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From page 6... ...
In reflecting on the decade-plus of climate assessment activity in the state, Hanemann described the change in attitude of local policy and decision makers. Initially, they dismissed the findings of the assessments as a low priority relative to immediate needs, but a decade later the same planners and policy makers were arguing vehemently with authors about the exact extent of projected sea level rise in the assessment compared to those in local guidance documents.
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From page 7... ...
. Because of their tight spatial structure and rapid temporal evolution, atmospheric rivers are one example of the challenges faced in downscaling climate models.
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ANDREW SCHWARZ, CALIFORNIA DELTA STEWARDSHIP COUNCIL California's geography and infrastructure make it a test case for understanding how climate change will impact water system operations, began Schwarz. Snowpack occurs at elevations that are sensitive to heat, many of these watersheds in turn feed into a tidal delta subject to sea level rise, and the water infrastructure has relatively little reservoir storage compared to large river systems such as the Colorado.
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From page 9... ...
Efforts by the Department of Water Resources and their contractors to repair the facility were affected by the cascading impacts of extreme weather far away, first when hurricane Harvey damaged a primary supply of liquid nitrogen used to cure cement and again when hurri ane Irmac damaged the offices of one of their subcontractors. Davis concluded that these lessons provide an excellent case study as to how the increasing numbers of extreme weather events will affect water managers and why additional resources are needed to better understand the phenomenon of atmospheric rivers.
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From page 10... ...
Schwarz replied that, although that was not the focus of this project, the DWR in collaboration with the USACE are undertaking a project that combines the decision scaling method with a local weather generation model using boundary conditions informed by global climate models to explore flood risk associated with extreme events like atmospheric rivers. Susanne Moser of Susanne Moser Research and Consulting noted that each presentation identified the importance of engaging decision makers to inform scientific research so that it is more immediately useful, and asked the panel to elaborate on their perceived research needs in the area of governance, human and institutional decision making, and the social sciences more broadly.
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From page 11... ...
2018. "Climate Change Risks Faced by the California Central Valley Water Resource System." California's Fourth Climate Change Assessment.
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