The Central Valley Hydrology Study (CVHS) was a multi-year effort of the California Department of Water Resources (DWR) and the US Army Corps of Engineers, Sacramento District (Corps), to update flood hazard information for the Central Valley. CVHS developed unregulated volume-frequency curves and regulated peak flow-frequency curves at over 200 locations. This systemwide information will be the basis of Central Valley studies for years to come and has already been applied for several studies, including the Central Valley Flood Protection Plan.
Below are CVHS technical memoranda and reports.
The sections below contain CVHS interim work product technical reports and memoranda prepared by various members of the CVHS study team. DWR’s Division of Flood Management, Hydrology Branch (referred to herein as DWR), was the project client. The CVHS study team was led by the US Army Corps of Engineers, Sacramento District, and is comprised of staff from the Corps, DWR, and the Corps’ prime contractor for this effort, David Ford Consulting Engineers. Although portions of the study were completed by various team members, the Corps approves all work products. This approval includes review following the District Quality Control process and Agency Technical Review. Details on the Corps approval and review process are available from the Corps.
These approved interim products are being provided for information and documentation purposes only. Documented interim results and findings during this development process were subject to change. The CVHS final report (2015) is the final documentation of the process and deliverables.
Interim work product technical memoranda
Interim work product sensitivity analysis reporting
The following interim work product memoranda describe various sensitivity analyses and comparisons to past studies that were completed throughout the study. This is not an exhaustive list of the sensitivity analyses. However, the documents provided below describe sensitivity analyses related to unregulated flow routings and comparisons of those routings to past studies.