| 摘要: |
| 为研究三峡工程变动回水区的泥沙淤积，建造了长达８００ｍ的全沙试验模型。模型范围包括长江和嘉陵江约２００ｋｍ的天然河段。进行了清水、浑水验证以及蓄水位高程为１７５、１８０和１５６ｍ的长系列模型试验。明确了各蓄水位方案下变动回水区河段的冲淤规律、泥沙淤积对该区航道和沿江港口的影响。为三峡工程的技术验证提供了科学依据。 |
| 关键词: 变动回水区，全沙模型，泥沙淤积，冲淤平衡 |
| DOI： |
| 分类号:TV149 |
| 基金项目: |
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| Investigation on sedimentation in varying backwater zone of Three Gorges Project |
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Don Guoren Wan Shenggan, Lu Changshi
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Nanjing Hydraulic Research Institute
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| Abstract: |
| A long river model, whose total length is about 800m, is used to simulate the varing backwater zone of the Three Gorges Project, covering 200km long of natural river reaches of the Yangtze River and Jialing River. The model is designed based on the total load similarity theory developed by first author. Verification tests show that the model has a basic similarity agreement with the prototype in the aspects of resistance characteristics,flow conditions and laws governing scouring and deposition. By using this model, a series of tests with normal reservoir elevations at 175m, 180m, and 156m with reservoir operation for 80 years and 30 years have been conducted to study the laws governing scouring and deposition in the varying backwater zone, the siltation configuration in channels and harbours for the feasibility studies of the Three Gorges Project. |
| Key words: varying backwater zone,total sediment transport model,siltation,fluvial equilibrium |
