汉江河口段航道整治工程效果与影响的计算分析  

Analysis and calculations on effect of the navigation training project on Hanjiang River estuarine reach

作　　者：董耀华[1] 李荣辉[1] 何广水[1] 

机构地区：[1]长江科学院,湖北武汉430010

出　　处：《泥沙研究》2009年第1期60-67,共8页Journal of Sediment Research

基　　金："十一五"国家科技支撑计划课题"三峡工程水库泥沙淤积及其影响与对策研究"(2006BAB05B02)

摘　　要：汉江河口段航道整治工程以疏浚、清障为主,辅以必要的护岸、护滩、填挖槽等工程措施,本文采用河道演变分析和一、二维水流数学模型计算,研究了该航道整治工程的效果及其对河道行洪的影响,并优化了工程方案。研究表明:(1)丹江口水库自1968年正式蓄水以来,汉江河口段河道总体冲刷下切,年内洪淤枯冲;影响河道演变的主要因素有:丹江口水库、长江与汉江顶托和天然节点与人工护岸等。(2)航道整治工程实施后,汉江河口段上段流速趋于减小,下段流速趋于增加;河道流速分布趋于均化。(3)航道整治工程对河道行洪的影响有限,最大洪水壅高9.4cm,优化方案的最大洪水壅高7.0cm。The navigation training project of the Hanjiang River estuarine reach mainly consists of dredging and clearing measures with necessary engineering works. Based on analysis of fluvial processes and calculations of 1-D and 2-D mathematical models, the efficiency of the project and its effect on floods have been studied, and an optimized scheme for the project has been proposed. Main conclusions are as follow. （ 1 ） After formal operation of Danjiangkou Reservoir in 1968, general scouring and lowering of river bed in the estuarine reach has occurred. Periodical fluvial processes within a hydrological year can be generally described as deposition in flood seasons and erosion in dry seasons. Key factors to influence fluvial processes are Danjiangkou Reservoir, interaction between Hanjiang River and Changjiang River, and natural control nodes and revetments. （2） After implementation of the project, flow velocity of the upper estuarine reach would incline to decrease, while flow velocity of the lower reach would tend to increase. Flow velocity of the channels would become more even-distributed. （3） Effects of the project on floods are very limited. The maximum rise of flood peak would be 9.4cm. However,the optimized scheme for the project could lower the maximum rise to 7.0cm.

关 键 词：汉江河口段 航道整治工程 河道演变 水流数学模型 

分 类 号：U617[交通运输工程—船舶及航道工程]