| 长江中下游河道冲淤演变的防洪效应 |
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| 引用本文： | 徐照明,徐兴亚,李安强,张黎明,胡春燕.长江中下游河道冲淤演变的防洪效应[J].水科学进展,2020,31(3):366-376. |
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| 作者姓名： | 徐照明 徐兴亚 李安强 张黎明 胡春燕 |
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| 作者单位： | 长江勘测规划设计研究有限责任公司,湖北武汉430010;长江勘测规划设计研究有限责任公司,湖北武汉430010;长江勘测规划设计研究有限责任公司,湖北武汉430010;长江勘测规划设计研究有限责任公司,湖北武汉430010;长江勘测规划设计研究有限责任公司,湖北武汉430010 |
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| 基金项目： | 国家重点研发计划资助项目2016YFC0402306 |
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| 摘 要： | 近年来长江中下游来沙量持续减少,河道面临长距离、长历时的冲淤调整,河道蓄泄关系发生变化,对防洪造成影响。在长江中下游河道冲淤及其蓄泄能力变化预测成果的基础上,对比计算了现状和未来河道蓄泄能力条件下,遇1954年洪水,长江上游水库防洪调度和中下游地区超额洪量的变化情况。结果表明,未来随着长江中下游河道进一步冲刷,河道槽蓄容积增加,相同防洪控制水位下的河道安全泄量增大,三峡水库在进行防洪调度时可下泄流量增大,总拦蓄洪量减小,长江中下游地区总超额洪量减小,但超额洪量在地区分布上存在从上游向下游转移的情况。
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| 关 键 词： | 河道演变 蓄泄能力 水库调度 超额洪量 长江中下游 |
| 收稿时间： | 2019-05-27 |
Flood control effect of the fluvial process in the middle and lower reaches of the Yangtze River |
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| XU Zhaoming,XU Xingya,LI Anqiang,ZHANG Liming,HU Chunyan.Flood control effect of the fluvial process in the middle and lower reaches of the Yangtze River[J].Advances in Water Science,2020,31(3):366-376. |
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| Authors: | XU Zhaoming XU Xingya LI Anqiang ZHANG Liming HU Chunyan |
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| Affiliation: | Changjiang Institute of Survey, Planning, Design and Research, Wuhan 430010, China |
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| Abstract: | The amount of sediment discharge into the middle and lower reaches of the Yangtze River continues to decrease under the influence of multiple factors including sediment interception by reservoirs and soil and water conservation. The river channel in the middle and lower reaches of the Yangtze River is subject to long-distance and long-term scouring and siltation adjustments. The storage and discharge capacity of the river channel changes accordingly, which influences flood control in the middle and lower reaches of the Yangtze River. The changes of flood control operation of upstream reservoirs and excessive flood volume in the middle and lower reaches encountering the flood of 1954 were simulated based on the prediction of the fluvial process in the middle and lower reaches of the Yangtze River for the next decade. With the further degradation of the river channel in the middle and lower reaches of the Yangtze River, the river channel storage and discharge capacity increased. The Three Gorges Reservoir can reduce the discharge flow during flood control operations and decrease the total flood interception volume. The total excessive flood volume in the middle and lower reaches of the Yangtze River decreased, but some excessive flood volume shifted from upstream to downstream in the spatial distribution. |
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| Keywords: | fluvial process storage and discharge capacity flood control operation excessive flood volume middle and lower reaches of the Yangtze River |
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