大型渠道糙率系数设计取值的不确定性及影响分析  

Uncertainty in Design Value of Roughness Coefficient for Large Scale Channel and Effects Analysis

作　　者：王开[1] 魏加华[1] 王光谦[1] 

机构地区：[1]清华大学水沙科学与水利水电工程国家重点实验室,北京100084

出　　处：《应用基础与工程科学学报》2008年第6期870-878,共9页Journal of Basic Science and Engineering

基　　金：国家自然科学创新研究群体科学基金资助项目(50221903)

摘　　要：大型调水工程糙率系数的设计取值与其它许多水利水电工程问题一样,存在着相当大的不确定性.本文在综述国内外大型调水工程糙率选取的基础上,综合考虑南水北调中线工程总干渠的渠道参数,建立了长距离渠道输水能力校核模型,并就总干渠综合糙率在一定范围内发生变化后对水面线及过流能力的影响进行了分析,研究结果对调水工程的糙率系数选取具有重要的指导作用.For a large water transport project, design value of roughness coefficient is of significant uncertainty as well as many other hydraulic and hydropower projects. Summarizing the confirming mode of roughness coefficient value for various large water transport project in China and abroad, totally considering the channel parameter of the chief channel of South-to-North Water Diversion Project, a simulation model is built to collate water transport capacity of the long distance channel. Furthermore, as the integrated roughness coefficient value changing in a limited range, the effects on water surface profile and flow transport capacity are analyzed by this model. Analytical results play a leader roll on confirming of roughness coefficient value for water transport project.

关 键 词：调水工程 糙率系数 敏感性 输水能力 南水北调 

分 类 号：TV68[水利工程—水利水电工程]