三峡下游芦家河水道演变规律研究

On the Evolution of Lujiahe Waterway in Downstream Side of the Three Gorges Project

芦家河水道是长江中游重要的浅滩水道之一．首先论述了该水道的河势特点及浅滩特性，指出年内洪枯两条航道交替使用及其双槽航道的同举并重是该水道问题的症结之所在；其次，分析总结了浅滩演变的基本规律及其年内冲淤演变的力学原因；最后，研究阐释了影响航道条件变化的关系，其中包括航道与主流和深泓的位置关系，航道条件与水位的关系，航道条件与洪水特性的关系等．

The Lujiahe Shoal is one of the important shoals in the middle reaches of the Yangtze River.Firstly,based on the analysis for some properties of nature in this waterway,it is pointed out that the key of the problem in the channel is to be used the flood navigation and the low water navigation in turn in year.And then,the basic evolution laws and their reasons are summarized.Finally,some factors to influence the changes of the navigation conditions,such as the relations among the positions for the navigation,the mainflow,and the thalweg in the channel each other,the relations between the navigation condition and water level,and the relations between the navigation condition and flood characteristic etc.,are discussed.