High-frequency sediment-level oscillations in the swash zone
Marine Geology
By: A. H. Sallenger Jr. and B. M. Richmond
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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.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | High-frequency sediment-level oscillations in the swash zone |
| Series title | Marine Geology |
| Volume | 60 |
| Issue | 1-4 |
| Year Published | 1984 |
| Language | English |
| Larger Work Type | Article |
| Larger Work Subtype | Journal Article |
| Larger Work Title | Marine Geology |
| First page | 155 |
| Last page | 164 |
| Google Analytic Metrics | Metrics page |