Sand budget for Capitola Beach, California
Anderson, Richard Glenn
Thompson, Warren C.
Thompson, Edward B.
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The beach at Capitola, California has a history of short-term variations about a nominally wide beach. This pattern was interrupted in 1965 when the beach was greatly depleted following the construction of Santa Cruz Harbor. The beach remained small until the construction of a groin and subsequent sand fill at Capitola in 1970. The annual sand budget developed for Capitola Beach shows a net gain of 1,300 cu. yds. The sand sources are littoral drift, 300,000 cu. yds., river discharge, 8,000 cu. yds., and seacliff erosion, 3,800 cu. yds., while sand loss is due to littoral drift, 310,500 cu. yds. The observed short-term variations in the beach are reflected in the monthly sand budget. The budget permits evaluation of the effect on the beach of varying each source due to the construction of artificial barriers. It is concluded that the harbor construction at Santa Cruz was responsible for the sand depletion at Capitola Beach in 1965.
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