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Subsidence

2017 Subsidence Network Monitoring Event

The California Department of Water Resources is planning a re-observation of subsidence in the Sacramento Valley Network in summer 2017. For more information about this effort please contact Seth Lawrence and Jim West in DWR's Red Bluff regional office

2016 Yolo Subsidence Network Observation Event

The WRA Board approved the Technical Committee's recommendation to allocate a portion of the FY15-16 project fund budget for an re-observation event of the Yolo County Subsidence Network in 2016. The observation data was collected in June 2016 with the leadership of Jim Frame, Frame Surveying & Mapping, from Davis. The WRA, Yolo County, Conaway Ranch and the Yolo County Flood Control & Water Conseration District provided the funding for this project. The project's proposed budget was $ 93,000, but ended up coming in under budget at $74,000. 2016 Yolo County Subsidence Network Report (pdf).

Please see the WRA Technical Committee meeting minutes for presentations and discussions about subsidence: 2016 YCSN Report, Frame Surveying & Mapping agenda item, 10/6/16; Results of InSAR Analysis update, Stanford University, 3/2/17 and also the WRA Board meeting agenda for March 20, 2017.

2008 Update on Sacramento Valley GPS Height-Monitoring Project

The Yolo County Subsidence Network monitoring project was the template and inspiration for DWR to expand a monitoring project throughout the Sacramento Valley.  Jim Frame, Frame Surveying and DWR staff are coordinating the surveying activities. In Yolo County, the cities of Davis and Woodland, Yolo County Flood Control & WCD, and UC Davis have committed staff or equipment to the project in addition to paticipation by local agencies in at least six counties in Northern California.  Observations in Yolo County took place between May 2 to May 22, 2008. Click the link below for the final 2008 report.

2008 Yolo County Vertical Deformation Analysis - June 2009 (pdf file)

DWR/USBR Sacramento Valley Subsidence - Report 2008 (pdf file)

DWR News/People - Winter 2008-09: GPS Technology cover story

Yolo County Subsidence - Report 2005 (pdf file)

Yolo County Subsidence - Report 2002 (pdf file)

Please visit the Local Agency Links to view individual agencies' plans

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