长江中游陆溪口水道航道整治目标调整分析

Goal Adjustment for Luxikou Waterway Regulation in the Yangtze River

陆溪口水道航道整治思路为利用当前有利时机,通过新洲筑坝、中洲护岸和直港进口挖槽等工程措施,达到提高航道尺度,改善通航条件,保持直港和中港两汊通航,以直港作为通航主航道。由于工程实施时陆溪口水道正处在剧烈的演变时期,以及受三峡工程蓄水后清水下泄的影响,直港作为通航主航道的目标难以实现,而中港航道条件良好。分析了中港通航条件现状和趋势,确定整治目标调整为以中港作为通航主航道,并相应取消直港进口挖槽。

The thought of Luxikou waterway regulation is firstly to make use of the current favourable opportunity.And the thought intends to improve the channel dimension and navigation conditions by taking advantage of the Xinzhou dam,Zhongzhou branch revetment and Zhigang branch dredged channel engineering measures;the regulation also intends to realize the navigation between Zhigang and Zhonggang branches,and finally to make Zhigang branch as the main channel.As the engineering is implemented in the drastic evolution period of Luxikou waterway,and is also influenced by the discharging water from the Three Gorges Reservoir,the target that Zhigang branch is used as the main channel is difficult to achieve;however,Zhonggang branch is in a good condition.Analysis on the navigation conditions in the status and trends of Zhonggang branch is carried out,which determines that the regulation goal is adjusted to make the Zhonggang branch as the main navigable channel.Therefore,the corresponding abolition of Zhigang branch dredged channel is carried out.