东流水道东港近期发展原因分析

Analysis of reasons for recent development of Dongliu waterway's Donggang channel

东流水道位于江西九江和安徽安庆之间,为顺直多分汊河型。该水道上段被老虎滩分为两汊,左侧称为老虎滩北槽,右汊即为东港。近年来,东港迅速发展,从而导致主航道所在的老虎滩北槽航道条件出现较大的不利变化趋势。本文以河道观测资料为基础,对东港发展的原因进行分析,得出"三峡水库蓄水运行后上游来水来沙条件变化是东港发展的主要原因,已实施的航道整治工程在一定程度上促进了东港发展"的结论,并结合地质勘察资料,对东港今后的发展趋势进行了预测。研究成果可为东流水道后续航道治理思路的确定提供参考。

Dongliu waterway locates between Jiujiang in Jiangxi province and Anqing in Anhui province. It＇s a straight fiver with multiple branches. The upper part of the waterway is divided into two branches by the Laohutan beach： The left one is called Laohutan north channel, and the fight one is Donggang. In recent years, due to the development of Donggang, the condition of Laohutan north channel is gets increasingly bad. Based on the observational data, this paper analyzes the development reason of Donggang channel and points out that the upstream runoff and sediment change after the impoundment and operation of the Three Gorges Reservoir is the most important reason for the development of Donggang chanel, and the waterway regulation engineering implemented promotes the development of Donggang to a certain extent. This paper also predicts the future development of Donggang based on the geological data. The research achievements may serve as reference for the follow-up project ideas and designs of waterway regulation.