长江上游东溪口河段河床及滩险演变特性分析  

Analysis on evolution characteristics of river bed and rapids in Dongxikou reach of upper Yangtze River

作　　者：李洪奇 林双 钟志强 王明 LI Hong-qi;LIN Shuang;ZHONG Zhi-qiang;WANG Ming(Yangtze River Luzhou Waterway Bureau, Luzhou 646000,China)

机构地区：[1]长江泸州航道局,泸州646000

出　　处：《水道港口》2020年第6期682-687,共6页Journal of Waterway and Harbor

基　　金：国家重点研发计划(2018YFB1600403)。

摘　　要：东溪口河段是长江上游泸渝段航道滩险,航道条件十分复杂,其河床变化及滩险演变对东溪口水道通航条件影响很大。掌握东溪口河段河床演变特性和原因是制定和实施长江上游东溪口水道生态航道建设的重要依据。文章利用现场调研及多年实测资料分析,揭示了东溪口河段近期河床演变的特性和原因。结果表明,天然情况下东溪口河段河势及河床基本保持稳定;采砂活动是东溪口河段河床及滩险明显变化的主要原因;东溪口河段左槽通航条件有所改善,但河床演变规律受上游枢纽影响不明显;右槽河床总体保持稳定,冲淤基本保持平衡,仅局部区域深槽略有淤积。研究结果可为该河段生态航道系统建设或局部改善工程提供有益参考。Dongxikou reach is the famous rapids reach in Luyu section of the upper reaches of the Yangtze River. The channel conditions are very complex. The changes of river bed and the evolution of beach have great influence on the navigation conditions of Dongxikou waterway. Understanding the characteristics and causes of river bed evolution in Dongxikou reach is an important basis for formulating and implementing the ecological waterway construction of Dongxikou waterway in the upper reaches of the Yangtze River. In this paper, the characteristics and causes of recent river bed evolution in Dongxikou reach were revealed by field investigation and analysis of many years′ measured data. The results show that, under natural conditions, the river regime and riverbed of Dongxikou reach are basically stable;sand mining activities are the main reason for obvious changes in riverbed and beach;navigation conditions of the left channel of Dongxikou reach have been improved, but the river bed evolution law is not obvious affected by the upstream hub;the riverbed of the right channel is generally stable and the erosion and deposition are basically balanced, and only some deep channels in some areas are slightly siltation. The results can provide a useful reference for the construction of ecological channel system or local improvement projects.

关 键 词：东溪口河段 河床演变 特性分析 

分 类 号：U617[交通运输工程—船舶及航道工程]