| COMPARISON BETWEEN RESULTS OF MODEL TESTS AND OBSERVED DATA FOR THE FLUCTUATING BACKWATER REGION OF THE GEZHOUBA RESERVOIR |
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| 作者单位： | WANG Guixian，CHEN Zhicongand ZHANG Ren Associate professor，Tsinghua University. Associate Professor，Tsinghua University; Professor，Tsinghua University. |
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| 摘 要： |
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COMPARISON BETWEEN RESULTS OF MODEL TESTS AND OBSERVED DATA FOR THE FLUCTUATING BACKWATER REGION OF THE GEZHOUBA RESERVOIR |
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| Authors: | WANG Guixian CHEN Zhicongand ZHANG Ren Associate professor Tsinghua University Associate Professor Tsinghua University Professor Tsinghua University |
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| Abstract: | The fluctuationg backwater region of a reservoir has a twofold property of a river as well as a reservoir and undergoes scouring and deposition alternately. Phys- ical model simulating the fluvial processes in a fluctuating backwater region has to ensure the similarities of both scouring and deposition. This causes some difficulties in model design and the selection of model sediment. This paper describes the model study of the fluctuating backwater region of the Gezhouba Project on the Yangtze River. Plastic particles with specific gravity of 1 .056 are used. The physical. model covers a reach of mountainous river 130 km in length. The experimental results show that the total amount of deposit, its distribution along the reach, the size distribution of the deposit, and lengths of the backwater region for various discharges all agree very well with the measured data in reservoir after 5 years of operation. This fact indicates that the model design, including the selection of model sediment, is quite acceptable. |
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| Keywords: | Fluctuating backwater region Model test Size distribution Verification test Bed material load Wash load Incipient velocity Settling velocity |
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