By Shoji Fukuoka, Hajime Nakagawa, Tetsuya Sumi, Hao Zhang
Sediments, which represent the skin of the Earth, commence their trip to rivers with the power received from rainfalls, fl oods and different ordinary methods. because of shipping of sediments, rivers advance with a number of appearances and capabilities, and play a vital position within the actions of humans and the existence cycles of alternative species. River sediment, as a traditional subject for river administration, has been the subject of continuous study considering the fact that precedent days, and because then major progresses in river sediment examine has been made. these days, river sediment is far extra attached to. Read more...
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Extra info for Advances in River Sediment Research
Sluicing is the method to discharge flood flow before its loading sediment is deposited in the reservoir. Therefore, the flow velocity in the reservoir must be considerably large, so that the drawing down of the water-stage is necessary. However, if the sediment is very fine suspension, the drawdown of the water stage in reservoir may not necessary be so large. The Sanmenxia Reservoir in China had accumulated far larger volume of sediment than expected and the upstream riverbed aggraded as high as inducing flood disasters within very early time after the completion.
2003). indb 4 7/22/2013 2:28:51 PM reduce sediment production on those slopes is, however, difficult. If check dams are constructed to store the transported sediment in the stream channel system, they can store only a small amount of sediment due to the steepness and narrowness of the channel. Therefore, in general, check dams cannot be very effective measure to reduce sediment inflow to the reservoir for a long time. Thus, the main purpose to install check dams should be to exclude large particles in the runoff sediment so as to make easier the handling of deposited sediment in the reservoir.
Takahashi, T. and Satofuka, Y. 2002. Generalized theory of stony and turbulent muddy debris-flow and its practical model, J. JSECE, 55(3) (in Japanese). Takahashi, T. Nakagawa, H. and Satofuka, Y. 2002. Sediment flushing from reservoirs using a reverse flow system, Proc. Intern. Symposium on Hydraulic and Hydrological Aspect of Reliability and Safety Assessment of Hydraulic Structures, Sankt-Peterburg. Takahashi, T. 2006. Sediment runoff phenomena and the counter-measures for sediment hazards, Nagoya: Kinmiraisha (in Japanese).