Floodplain Regulation Downstream of Barrett Dam, CA

by Jeffrey M. Cooper, BSI Consultants Inc, San Diego, CA, USA,
Robert H. Born, BSI Consultants Inc, San Diego, CA, USA,



Document Type: Proceeding Paper

Part of: Steel Structures

Abstract:

Barrett Dam is owned and operated by the City of San Diego, California. The Dam was built in the early 1920's to be an additional source of water for the growing City with a possible capacity of approximately 44,800 acre-ft. of water. This paper describes the response of the dam to heavy storms that occurred in Southern California in 1980. Synthetic hydrographs were developed for the historical events and an analysis was developed to determine what impact the dam had on the 'naturally' occurring watershed hydrograph. Subsequent to construction of the dam, encroachments were allowed to occur within the downstream floodplain. This paper evaluates the impacts on the operation of the reservoir in order to protect those encroachments from inundation and points out the absolute necessity for proper floodplain development regulations if the integrity of the project yield is to be maintained.

Subject Headings: Dams | Floods | Hydrographs | Laws and regulations | Watersheds | Urban areas | Storms | California | United States

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