三峡水库蓄水后重庆河段冲淤特性研究

发布时间：2019-06-15 13:47

【摘要】：三峡水库蓄水对重庆河段冲淤影响的研究具有重要的科学价值和应用前景。根据水沙连续原理和重庆河段输沙特点,考虑嘉陵江汇流和水沙变化特征,导出了重庆河段泥沙淤积比的公式,分析了不同时期河段冲淤变化特点,论证了重庆河段淤积比与嘉陵江汇流比和寸滩站流量有重要关系。三峡水库蓄水初期重庆河段冲淤特点与蓄水前基本一致,具有汛期淤积、非汛期冲刷的特点。试验性蓄水以来河段冲淤特性发生变化,汛后蓄水期和汛前消落期河段有冲有淤,总体发生淤积。汛期河道有冲有淤,淤积有所减轻,甚至发生冲刷。河道采砂对重庆主城区河段冲淤产生重要影响。
[Abstract]:It is of great scientific value and application prospect to study the influence of water storage of three Gorges Reservoir on scouring and silting in Chongqing reach. According to the continuous principle of water and sediment and the characteristics of sediment transport in Chongqing reach, considering the variation characteristics of confluence and water and sediment in Jialing River, the formula of sediment deposition ratio in Chongqing reach is derived, the variation characteristics of scouring and silting in different periods are analyzed, and it is proved that the siltation ratio in Chongqing reach is closely related to the confluence ratio of Jialing River and the flow rate of Cintan station. The scouring and silting characteristics of Chongqing reach in the initial impoundment stage of the three Gorges Reservoir are basically the same as those before impoundment, which have the characteristics of siltation in flood season and scour in non-flood season. Since the experimental water storage, the scouring and silting characteristics of the reach have changed. There are scouring and silting in the post-flood period and the pre-flood and falling period, and silting occurs as a whole. In flood season, there are scouring and silting, siltation has been alleviated, and even scour has occurred. River sand mining has an important impact on scouring and silting in the main urban area of Chongqing.
【作者单位】：国际泥沙研究培训中心;中国水利水电科学研究院;北京交通大学;水利部水文局;
【基金】：国家十二五科技支撑计划项目专题(2012BAB04B02-2) 国家自然科学基金项目(51679259,51179208)
【分类号】：TV147

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