Field study and modelling on the characteristics of bed mud formation processes at the Rokkaku River
Watanabe, R.; Kusuda, T.; Yamanishi, H.; Yamasaki, K. (2002). Field study and modelling on the characteristics of bed mud formation processes at the Rokkaku River, in: Winterwerp, J.C. et al. (Ed.) Fine sediment dynamics in the marine environment. Proceedings in Marine Science, 5: pp. 513-526 In: Winterwerp, J.C.; Kranenburg, C. (Ed.) (2002). Fine sediment dynamics in the marine environment. Proceedings in Marine Science, 5. Elsevier: Amsterdam. ISBN 0-444-51136-9. XV, 713 pp., more In: Proceedings in Marine Science. Elsevier: New York. ISSN 1568-2692; e-ISSN 2352-2860, more |  |
| Keyword | | | Author keywords | muddy tidal river; estuary; bed mud; sedimentation rate; intertidal mudflats |
| Authors | | Top | - Watanabe, R.
- Kusuda, T.
- Yamanishi, H.
- Yamasaki, K.
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| Abstract | Field observations of bed mud formation prosesses were continuously carried out at a site 11 km upstream from the river mouth of the Rokkaku River in Japan from November 28, 1994 to February 4, 1995. A large experimental reservoir was constructed along a mudbank in the midstream of the Rokkaku River. From the observations, the maximum sedimentation rate on the Oats per one tide cycle reached about 0.01 m at spring tide. Based on the observations, modelling the bed mud formation process in the reservoir was performed. The process of the bed mud formation consists of three stages: deposition-consolidation, sweep-out and evaporation processes. The simulation results explain the formation process of the bed mud layers in the reservoir very well, so that, the process in tidal rivers can be explained in terms of this method by composing shear stress in the bed itself and that generated by the flow. |
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