| A MATHEMATICAL MODEL FOR RESERVOIR SEDIMENTATION AND FLUVIAL PROCESSES |
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| 作者姓名： | Han Qiwei and He Mingmin |
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| 作者单位： | Han Qiwei and He Mingmin (Senior Research Engineers，Dept. of Sedimentation Eng. Inst. of Water Conservancy and Hydroelectric Power Research.) (The English text is abridged，altered and edited by Ding Lianzhen) |
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| 摘 要： | I. INTRODUCTIONAt present moot sediment transport models applied in engineering practice are based on equilibriumsediment transport approach, i. e. sediment--carrying Capacity is used to replace the actual sediment concentration (ref. 1 -- 9). However, the sediment--carrying capacity, in general, is not equal to sedimentconcentration, they may differ a lot especially for the case of reservoir sedimentation process and/orthe scouring process of river channel in the downstream of a reservoi…
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A MATHEMATICAL MODEL FOR RESERVOIR SEDIMENTATION AND FLUVIAL PROCESSES |
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| Han Qiwei and He Mingmin.A MATHEMATICAL MODEL FOR RESERVOIR SEDIMENTATION AND FLUVIAL PROCESSES[J].International Journal of Sediment Research,1990(2). |
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| Authors: | Han Qiwei and He Mingmin |
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| Abstract: | This paper consists of two parts: mechanism of non-equilibrium transport of non-uniform sediment and its application in the mathematical model. Based on a statistic approach of sediment transport proposed by the authors, a 1 - D equation of non-e- quilibrium transport for various size group of sediment particles is developed. Then equations to predict change of sediment concentration and the corresponding changes in size distribution of suspended load and bed material are also derived. The conception that changes in size distribution are interrelated to sediment-carrying capacity is expounded. These results reveal the essence of sediment transport of non-uniform sediment particles. In the second part a mathematical model incorporating the mentioned equations to compute deposition and scouring in reservoirs as well as the fluvial processes of river channels has been developed. Verification of the model agrees well with field data. |
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| Keywords: | Mathematical model Non-equilibrium sediment transport Sediment-carrying capacity Reservoir sedimentation Fluvial process Size distribution Bed material Scouring Deposition Exchange intensity Consolidation of deposit |
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