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Prediction of Concerted Sediment Flushing |
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| Authors: | Jian Liu Shuhei Minami Hideki Otsuki Bingyi Liu Kazuo Ashida |
| Affiliation: | 1PhD, Associate Professor, College of Architecture and Civil Engineering, Shenzhen Univ., Shenzhen 518060, China. 2Assistant Manager, Dept. of River & Coastal Engineering, NEWJEC Inc., Osaka 542-0082, Japan. E-mail: minamish@newjec.co.jp 3PhD, Manager, Dept. of River & Coastal Engineering, NEWJEC Inc., Osaka 542-0082, Japan. E-mail: otsukihd@newjec.co.jp 4PhD, President, Hydro-soft Technology Institute Co., Ltd., 7-4 Minamihorie 1-chome, Nishi-ku, Osaka 550-0015, Japan. E-mail: liuby@hydro-soft.com 5PhD, Professor Emeritus, Kyoto Univ.; President, Research Institute of River & Watershed Environment Management, Irifune, Chuo-ku, Tokyo 104-0042, Japan. |
| Abstract: | A proprietary one-dimensional numerical model was developed for predicting the amounts of sediment flushed and deposited in the reservoirs in series, the bed evolutions, and variations of the suspended solids concentrations along a river during the concerted sediment flushing events. The model consists of a flow movement module and sediment transport module in which the bed material load is taken as sediment mixture. The nonuniform property of the bed material load is modeled by the introduction of a mixing layer, transition layer, and deposition strata. The model was calibrated on the basis of the field data at Dashidaira and Unazuki reservoirs on the Kurobe River in Japan. The calculated results are in good agreement with the measurements. For the reservoirs out of Japan, the Ashida and Michiue bed load formula used in the model should be verified or replaced by other formulas. |
| Keywords: | Japan One-dimensional models Sediment Reservoirs Suspended solids Rivers Flushing |