Download Advances in River Sediment Research by Shoji Fukuoka, Hajime Nakagawa, Tetsuya Sumi, Hao Zhang PDF

By Shoji Fukuoka, Hajime Nakagawa, Tetsuya Sumi, Hao Zhang

Sediments, which represent the skin of the Earth, commence their trip to rivers with the strength acquired from rainfalls, fl oods and different ordinary procedures. as a result of shipping of sediments, rivers advance with quite a few appearances and features, and play a very important function within the actions of humans and the existence cycles of alternative species. River sediment, as a traditional subject for river administration, has been the Read more...

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Indb 6 7/22/2013 2:28:52 PM Moreover, there are many reservoirs whose inflow sediment is too coarse to pass-through by the mere drawing-down of the lake water level so that the sediment sluicing is impossible, the peak flood rate is too large to discharge all the water and sediment via a bypass tunnel so that the Asahi dam method is not applicable, and mechanically removed sediment by excavation or dredging cannot be taken out due to various restrictions. Overviewing the above mentioned existing methods to cope with the reservoir sedimentation, the lack of the method that is applicable to a large reservoir with large RI value is clear.

15 million m3 that is sufficient volume capacity for the severest sediment yield in a year. The effectiveness of the reverse flow system to flush sediment was confirmed by the previous fundamental experiments (Takahashi et al. 2002). 07 in sediment concentration from the respective A and B ravines. indb 14 7/22/2013 2:28:54 PM Figure 10. Initial delta deposit before flushing. Figure 11. Delta deposit after 24 hours’ flushing. indb 15 7/22/2013 2:28:54 PM Figure 12. Temporal variation of flushed out sediment discharge and volume.

Strategies for managing reservoir sedimentation, International J. of Sediment Research, 24(4). , Terada, M. and Kokubo, T. 1997. Planning and hydraulic design of bypass tunnel for sluicing sediment past Asahi Reservir, 19 Congress of Large Dams, Florence. Martini, O. 2000. La galerie de derivation de Palagnedra, International Workshop and Symposium on Reservoir Sedimentation Management, Toyama. Palmieri, A. 2003. Social and economic aspects of reservoir conservation, Proc. of the Session ‘Challenges to the Sedimentation Management for Reservoir Sustainability’, The 3rd World Water Forum, Otsu, Japan.

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