Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
4690714 | Sedimentary Geology | 2007 | 24 Pages |
Abstract
The distinctions between tsunami and storm deposits are related to differences in the hydrodynamics and sediment-sorting processes during transport. Tsunami deposition results from a few high-velocity, long-period waves that entrain sediment from the shoreface, beach, and landward erosion zone. Tsunamis can have flow depths greater than 10Â m, transport sediment primarily in suspension, and distribute the load over a broad region where sediment falls out of suspension when flow decelerates. In contrast, storm inundation generally is gradual and prolonged, consisting of many waves that erode beaches and dunes with no significant overland return flow until after the main flooding. Storm flow depths are commonly <Â 3Â m, sediment is transported primarily as bed load by traction, and the load is deposited within a zone relatively close to the beach.
Related Topics
Physical Sciences and Engineering
Earth and Planetary Sciences
Earth-Surface Processes
Authors
Robert A. Morton, Guy Gelfenbaum, Bruce E. Jaffe,