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Estimated subsidence in the Chino-Riverside and Bunker Hill-Yucaipa areas in Southern California for a postulated water-level lowering, 1965-2015

Open-File Report 71-183

Prepared in cooperation with the California Department of Water Resources
By:

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Abstract

One of the alternate plans for water utilization being considered by the California Department of Water Resources in the Chino-Riverside and Bunker Hill-Yucaipa areas in southern California involves partial mining of ground water during the period 1965-2015, and consequent substantial lowering of water levels. The Department wants to know whether land subsidence would be a problem as a result of the postulated lowering. To answer this question, to the extent that leveling control permits, the present study has been made at the request of and in cooperation with the State of California.

At a few locations in the Chino-Riverside and Bunker Hill-Yucaipa areas, comparable water-level decline and subsidence data are available from which rough estimates can be made of subsidence that would occur as a result of the postulated lowering from 1965 to 2015. Limited leveling control, and apparent discrepancies in the data, preclude accurate determination of amounts of subsidence caused by historic water-level decline.

Based on 1965-2015 water-level changes postulated by the California Department of Water Resources and on available subsidence/head decline ratios, as much as 6 feet of subsidence might occur northeast of the San Jacinto fault between Loma Linda and San Bernardino, in an area of more than 350 feet of projected water-level decline. Also, as much as 1.5 feet of subsidence might occur in the vicinity of Ontario.


Study Area

Additional publication details

Publication type:
Report
Publication Subtype:
USGS Numbered Series
Title:
Estimated subsidence in the Chino-Riverside and Bunker Hill-Yucaipa areas in Southern California for a postulated water-level lowering, 1965-2015
Series title:
Open-File Report
Series number:
71-183
Year Published:
1971
Language:
English
Publisher:
U.S. Geological Survey
Description:
20 p.
Country:
United States
State:
California
County:
Riverside County, San Bernadino County
Other Geospatial:
Bunker Hill-Yucaipa area, Chino-Riverside area