| 三峡水库蓄水后荆江典型分汊河段演变机理及发展趋势研究 |
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| 引用本文： | 朱玲玲,张为,葛华.三峡水库蓄水后荆江典型分汊河段演变机理及发展趋势研究[J].水力发电学报,2011,30(5). |
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| 作者姓名： | 朱玲玲 张为 葛华 |
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| 作者单位： | 1. 武汉大学水资源与水电工程科学目家重点实验室,武汉,430072
2. 长江科学院河流所,武汉,430010 |
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| 基金项目： | 国家自然科学基金(51009109) |
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| 摘 要： | 分汊河段水动力轴线受水沙及河床边界等的影响易于摆动,主流摆动为主支汊易位提供动力条件,也使得分汊河段心滩及边滩的演变趋于复杂。三峡水库蓄水后,水沙条件变异使得下游分汊河段主流摆动现象及其影响更加显著。本文以荆江典型分汊河段——沙市河段为例,分析了分汊河段的演变特点及机理,明确了水动力条件、来沙及洲滩相互作用对浅滩演变的重要影响。在此基础上,结合三峡水库蓄水后水沙条件变化特点,研究河段演变趋势。
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| 关 键 词： | 河流泥沙工程学 分汊河段 主流摆动 特征流量级 三峡水库蓄水 |
Evolution trend and causes of the typical braided middle Yangtze reach after Three Gorges reservior impoundment |
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| ZHU Lingling,ZHANG Wei,GE Hua.Evolution trend and causes of the typical braided middle Yangtze reach after Three Gorges reservior impoundment[J].Journal of Hydroelectric Engineering,2011,30(5). |
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| Authors: | ZHU Lingling ZHANG Wei GE Hua |
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| Affiliation: | ZHU Lingling1,ZHANG Wei1,GE Hua2(1.State Key Laboratory of Water Resources and Hydropower Engineering Science,Wuhan University,Wuhan 430072,2.Department of River Dynamics,Changjiang River Scientific Research Institute,Wuhan 430010) |
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| Abstract: | Under time variations of flow,sediment and river bed boundary,etc.,the dynamic flow axis of braided river reach sways quite commonly,which provides power to translocation of the main and branch channels and complicates evolution of channel bars and point bars.Impoundment of the Three Gorges reservoir causes greater variations in flow and sediment and hence more substantial and influential swaying of the mainstream path.This paper analyzes the evolution of braided reach in a case study of Shashi reach,and de... |
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| Keywords: | river sedimentation engineering braided reach sway of mainstream characteristic discharge TGP water-impoundment |
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