| Abstract: | Sediment-level oscillations with heights of about 6 cm and shore-normal lengths of order 10 m have been measured in the swash zone of a high-energy, coarse-sand beach. Crests of oscillations were shore parallel and continuous alongshore. The oscillations were of such low steepness (height-to-length ratio approximately 0.006) that they were difficult to detect visually. The period of oscillation ranged between 6 and 15 min and decreased landward across the swash zone. The sediment-level oscillations were progressive landward with an average migration rate in the middle to upper swash zone of 0.8 m min-1. Migration was caused mostly by erosion on the seaward flank of the crest of an oscillation during a period of net seaward sediment transport. Thus, the observed migration was a form migration landward rather than a migration involving net landward sediment transport. The observed sediment-level oscillations were different than sand waves or other swash-zone bedforms previously described. ?? 1984. |
| Genre: | Article |
| ProdID: | 70014009 |
| Citation Author: | Sallenger, Jr. , A. H.; Richmond, B. M. |
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| Citation End Page: | 164 |
| Citation Issue: | 1-4 |
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| Citation Language: | English |
| Citation Larger Work Title: | Marine Geology |
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| Citation Number Of Pages: | 10 |
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| Citation Search Results Text: | High-frequency sediment-level oscillations in the swash zone; 1984; Article; Journal; Marine Geology; Sallenger, Jr. , A. H.; Richmond, B. M. |
| Citation Start Page: | 155 |
| Citation Volume: | 60 |
| Citation Year: | 1984 |
| Type: | citation/reference |
| Text: | High-frequency sediment-level oscillations in the swash zone; 1984; Article; Journal; Marine Geology; Sallenger, Jr. , A. H.; Richmond, B. M. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| Date Other: | Sun, 1 Jan 1984 00:00 -0600 |
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