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https://hdl.handle.net/11681/3453| Title: | Wave action and sand movement near Anaheim Bay, California |
| Authors: | United States. Army. Office of the Chief of Engineers Caldwell, Joseph M. (Joseph Morton) |
| Keywords: | Anaheim Bay, California Littoral Drift Water waves Wave energy Sand transport Sand movement |
| Publisher: | United States, Beach Erosion Board Engineer Research and Development Center (U.S.) |
| Series/Report no.: | Technical memorandum (United States. Beach Erosion Board) ; no. 68. |
| Description: | Technical Memorandum From the Introduction: The purpose of this study was to determine the degree to which mass alongshore sand movement on the beach and offshore bottom could be correlated with the characteristics of the ocean waves impinging on the beach. In order to measure accurately the volume of this sand movement, it was necessary to select a site adjacent to a littoral barrier. Assuming that the area measured extends seaward to a depth sufficient to include all of the bed where significant material transport occurs, surveys of such a site would be expected to provide reliable evidence of the volume and direction of littoral transport between successive measurements. The opportunity to accomplish the desired study was recognized when a sand fill was placed on the beach as a shore protection measure at Surfside, California, immediately south of the Anaheim Bay jetties. These jetties were completed in 1944 and serve as an effective barrier to littoral sand transport along the shore out to a depth of about 20 feet. The construction of the jetties was followed by severe erosion of the beach immediately to the south of the south jetty; the eroded sand was apparently transported southerly by the dominant wave action. Erosion had progressed to such degree that extensive property damage was imminent and late in 1947 a beach fill was placed to restore the shore. The fact that absence of structures on the beach for 5 miles or more to the south of Surfside permitted a free movement of the sand away from Surfside under the impulsion of wave action was favorable to the purpose of correlating sand movement with wave characteristics. The transport of the beach fill out of the area by wave action was measured by a series of surveys covering the period from March 1948 to August 1949. In order to obtain supplementary data on shore changes, most of the surveys were extended to cover the shore as far as the mouth of Santa Ana River, some 10 miles to the south. The results of these extended surveys are not included in this report because they do not lend themselves to the basic objectives of this study. In addition to the hydrographic surveys, other physical data were obtained, including wave records from gages installed on Huntington Beach Pier, some 6 miles south of Anaheim Bay. The daily synoptic weather charts also were utilized to compute wave action to be expected in the Surfside area. The wave data thus obtained were converted into alongshore components of wave energy. The relation between the alongshore wave energy and the concurrent rate of movement of the sand fill was then studied. The results of the study are presented in this report. |
| Rights: | Approved for Public Release, Distribution is Unlimited |
| URI: | http://hdl.handle.net/11681/3453 |
| Appears in Collections: | Technical Memorandum |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| BEB-TM-68.pdf | 834.07 kB | Adobe PDF |  View/Open |