三峡水库坝下游河道反应与治理对策探讨

发布时间：2018-02-08 21:35

本文关键词： 河道反应河流演变系统自动调整再平衡河道治理三峡水库　出处：《人民长江》2017年11期 　论文类型：期刊论文

【摘要】：受三峡水库蓄水拦沙影响,坝下游河道将发生长距离、长时期的调整,并引起河势调整、崩岸增加、枯水位下降、荆江三口分流减少等河道反应,需采取科学的应对措施。介绍了国外关于均衡河流与优良河道形态的描述,引入传统五行系统观,分析了比降、流速、床沙、悬沙、水深5个因子的循环激励与制约关系,阐述了河流演变系统自动调整与再平衡过程。为应对河道反应,提出了河道整治与崩岸治理、水库优化调度、河道监测与分析研究等对策,探讨了河道治理原则和典型河段治理思路,建议采用护底加糙、口门改道、潜坝限流等整治措施,以期为坝下游河道保护与治理提供参考。
[Abstract]:Affected by the impoundment and sediment retention of the three Gorges Reservoir, the downstream channel of the dam will undergo long distance and long term adjustment, which will cause river regime adjustment, increase of bank collapse, decrease of dry water level, decrease of the diversion of three ports of Jingjiang River, etc. It is necessary to take scientific measures to deal with this problem. This paper introduces the description of balanced rivers and good river courses abroad, introduces the traditional five elements system view, and analyzes the relationship between cyclic excitation and restriction of five factors, namely, specific drop, velocity of velocity, bed sand, suspended sediment and water depth. This paper expounds the process of automatic adjustment and rebalance of river evolution system. In order to deal with the river channel reaction, the countermeasures such as river regulation and bank collapse control, reservoir optimal operation, river channel monitoring and analysis are put forward. This paper probes into the principles of river course regulation and the thought of typical river reach control, and suggests to adopt the regulation measures such as protecting the bottom roughness, changing the entrance and limiting the flow of the submersible dam, in order to provide reference for the protection and regulation of the downstream channel of the dam.
【作者单位】：长江科学院河流所;
【基金】：国家自然科学基金重点项目(51339001) “十二五”科技支撑计划课题(2013BAB12B02) 水利部公益性行业专项(201401021) 三峡后续工作科研项目(0001792015CB50003)
【分类号】：TV147.5;TV85

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