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https://hdl.handle.net/11681/3363| Title: | Sand movement on the shallow inter-canyon shelf at La Jolla, California |
| Authors: | United States. Army. Office of the Chief of Engineers Scripps Institution of Oceanography Shepard, Francis P. (Francis Parker), 1897-1985 Inman, Douglas L. (Douglas Lamar), 1920-2016 |
| Keywords: | La Jolla, California Submarine Canyons Sand Movement Littoral Drift Beach Erosion |
| Publisher: | United States, Beach Erosion Board Engineer Research and Development Center (U.S.) |
| Series/Report no.: | Technical memorandum (United States. Beach Erosion Board) ; no. 26. |
| Description: | Technical Memorandum Abstract: The nature of changes in the sand level of a beach and shallow shelf area between two submarine canyon heads has been indicated by eight repeated surveys accompanied by five sand sampling operations. It is believed that these surveys establish significant cut and fill out to depths of at least 100 feet. During large waves sediment is lost the area by transportation into the submarine canyons. Replenishment of the sediment is apparently due to transport around the head of the northern of the two submarine canyons. The amount of sand introduced in this way in estimated to be of the order of 100 times as much as introduced from the erosion of the land adjacent to the intercanyon area. On the other hand, little sand is carried around the southern canyon. Along and near the shore sand is moved seaward during large waves and landward during small waves. With diagonal approaching waves much sand is carried along the coast. On the outer shelf movement takes place more parallel to the shore than normal to it. The accuracy of repeat surveys is discussed with suggestions as to the best methods. This report first appeared in limited issue as Submarine Geology Report No. 21, Scripps Institution of Oceanography, University of California. |
| Rights: | Approved for Public Release, Distribution is Unlimited |
| URI: | http://hdl.handle.net/11681/3363 |
| Appears in Collections: | Technical Memorandum |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| BEB-TM-26.pdf | 2.37 MB | Adobe PDF |  View/Open |