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Flood Management

Special Studies


The Department of Water Resources (DWR) has completed selected special studies to support floodplain evaluation and delineation. Example studies recently completed include

  • Sacramento and San Joaquin River Basins Comprehensive Study (2002): This study was a joint effort by the State of California Reclamation Board and the U.S. Army Corps of Engineers (USACE) in coordination with Federal, State and local agencies. It provides a Comprehensive Plan for Flood Damage Reduction and Ecosystem Restoration within the two river basins, and a strategy for implementation. Numerous technical analyses were performed for this study using computer modeling tools developed by the USACE and DWR to simulate the hydrology, hydraulics, ecosystem function, flood risk and associated economic damages in the Sacramento and San Joaquin river systems. DWR, USACE, and others will use these models in developing future flood management and environmental improvement projects in the Sacramento and San Joaquin river basins.
  • The Upper Feather River Floodplain Mapping Study (2002, updated 2008): DWR commissioned USACE to prepare a floodplain mapping study along the Feather River. The study extends from the mouth of the Yuba River upstream to Oroville Dam, approximately 44 miles in length. The study delineates the 100-, 200-, and 500-year floodplains along the Feather River between the Yuba River and Oroville Dam.
  • The Lower Feather River Floodplain Mapping Study (2005): DWR commissioned USACE to prepare a floodplain mapping study along the Lower Feather River. This study addresses flooding from the Feather River downstream from the Yuba River confluence to the mouth of the Feather River at Sacramento River. It also addresses flooding from the Bear River downstream of Highway 65 and several tributaries to the Bear River.