长江镇扬河段世业洲汊道近期演变与整治对策

The recent evolution and management of Shiyezhou channel in Zhenyang reach of the Yangtze River

世业洲汊道上承仪征水道,下接六圩弯道,百余年来支汊在左、主汊在右的状况未发生改变,但汊道从稳定到左汊缓慢发展、右汊相应萎缩的变化十分清晰。从分流比、断面要素等方面分析了长江镇扬河段世业洲汊道近期河床演变情况,概述了近期汊道整治情况,指出了汊道目前存在的问题与不利影响,根据和畅洲汊道整治教训,进一步提出世业洲汊道整治对策。

Shiyezhou bifurcated channel connects Yizheng waterway at the upper part and Liuyu bend channel at the lower part.The situation of branch channel in the left and main channel in the right was unchanged in the over past 100 years.But it is obvious that the channel is changed from stable to the slower development of the left branches and the corresponding atrophy of the right branch.In this paper,the recent river evolution of Shiyezhou bifurcated channel at Zhenyang section of the Yangtze River is analyzed from the aspects of diversion ratio and cross section,the recent channel regulation is summarized and the existing problems and adverse effect are pointed out.The countermeasures for Shiyezhou channel regulation in line with lessons learnt from the Hechangzhou channel regulation is further put forward.