长江中游沙卵石河段枯水水位变化及其对通航的影响  

Water lever changing law in dry season and its effects on navigation in the middle Yangtze River

作　　者：李明 

机构地区：[1]长江航道规划设计研究院,湖北武汉430011

出　　处：《水运工程》2017年第4期156-160,共5页Port & Waterway Engineering

摘　　要：三峡工程蓄水以来,长江中游宜昌至大埠街这一沙卵石河段的河床持续冲刷下切,枯水同流量下水位逐步下降。基于实测资料,对枯水水位变化的原因进行研究,并就枯水水位下降对通航条件的影响进行分析。认为:沙卵石河段内的河床冲刷下切是枯水同流量下水位下降的主要原因,但河床粗化在一定程度上减小了水位下降幅度;随着枯水水位的进一步下降,为确保葛洲坝船闸的正常运行,三峡工程枯水期调度压力将逐步增加,且局部卵石浅滩的碍航问题也会日益突出。After the impoundment of the Three Gorges project,riverbed of the sandy gravel reach of YichangDabujie had been eroding continuously,and water level in the same discharge dropped gradually in the dry season.Based on the real-measured data,this paper probes into the reason for the water level＇ s dropping in the dry reason and its effects on the navigation condition.It is concluded that riverbed erosion is the main reason for water level＇ s dropping in the dry season.With the further dropping of the water lever in the dry season,to ensure the operation of Gezhouba navigation lock,the navigation lock dispatch pressure would increase,and navigation obstruction problem in local pebble shoal would turn more serious.

关 键 词：三峡工程 沙卵石河段 坝下游冲刷 枯水水位 

分 类 号：U617[交通运输工程—船舶及航道工程]