Surface erosion of fine-grained sediment revisited
Mehta, A.J.; Parchure, T.M. (2000). Surface erosion of fine-grained sediment revisited, in: Flemming, B.W. et al. (Ed.) Muddy coast dynamics and resource management. Proceedings in Marine Science, 2: pp. 55-74
In: Flemming, B.W.; Delafontaine, M.T.; Liebezeit, G. (Ed.) (2000). Muddy coast dynamics and resource management. Proceedings in Marine Science, 2. Elsevier: Amsterdam. ISBN 0-444-50464-8. 294 pp., meer
In: Proceedings in Marine Science. Elsevier: New York. ISSN 1568-2692; e-ISSN 2352-2860, meer
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| Auteurs | | Top |
- Mehta, A.J.
- Parchure, T.M.
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| Abstract |
For applications in waters with low to moderate concentrations of suspended fine-grained sediments, the formula of Kandiah (1974) for the rate of bed surface erosion remains a convenient model for simulating scour due to steady or quasi-steady flows. Arulanandan et al. (1980) show that the two parameters characterizing this formula, namely the erosion rate constant and the bed shear strength with respect to erosion, seem to be related in such a way that the rate constant decreases with easing shear strength. Other studies have shown that the shear strength correlates with bed density. We have used these findings to develop a formula for estimating the rate of erosion from bed density for sediments which are largely inorganic. While this formula cannot replace the need for laboratory or prototype testing of sediment beds for an accurate determination of erosion rate, it may be used to obtain "first cut" values of the rate characterizing parameters in situations where they are unavailable from measurements. Recent experimental results suggest that the formula may also be useful for estimating the rate of erosion of organic-rich sediments. |
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