洞庭湖区季节性河流浅滩航道整治方法初探--以安乡至茅草街航线七星堆滩整治为例

安乡至茅草街航线位于洞庭湖区长江分洪道凇滋河与虎渡河会流后的尾闾段，该航线为季节性河流．此类河流浅滩来水来沙条件及演变规律均与一般平原河流浅滩明显不同．涨水期河段输沙顺畅时，浅滩主流以冲刷为主；周边河流涨水及洞庭湖水位普遍抬高的滞水期，浅滩发生淤积．以七星堆滩为典型，归纳了针对该类浅滩在挖横布置及整治建筑物方面的设计原理，总结了该类滩险航道整治的设计思路、整治原则和方法．

Regulation Method of Shoal Waterway of Seasonal Navigation in Dongting Lake--illustrated by the regulation of Qixingdui Shoal between Anxiang and Maocaojie

The waterway from Anxiang to Maocaojie lies on the lower reaches of Songzi River and Hudu River after their confluence in flood diversion area of Yangtze River. This waterway is a seasonal stream. Its conditions of water,sand and evolution is different from those of plain river shoal. Erosion plays main role in the shallow main stream when sand is carried smoothly during flooding.It leaves mud in the shallow when the water of the rivers or the water level of Dongting Lake rises. In this paper,a typical example of Qixingdui shoal is shown. It sums up the thoughts of design and the principles and methods of regulation for this kind of dangerous shoals. A survey is made on this kind of shoals to find the design principle of grooving arrangements and regulation.