渠道水利用系数计算方法及误差分析  

Study on Calculation Method and Error Analysis of Water Use Efficiency of Canal

作　　者：张霞[1] 李新刚 陈利利 

机构地区：[1]黄河水利科学研究院引黄灌溉工程技术研究中心,河南新乡453003 [2]河南省人民胜利渠管理局,河南新乡453003

出　　处：《节水灌溉》2009年第4期49-51,共3页Water Saving Irrigation

基　　金：黄河水利科学研究院中央级公益性科研院所基本科研业务费专项资金资助项目"基于生态地下水位约束的青铜峡灌区节水阈值研究"(HKY-JBYW-2007-14)

摘　　要：以内蒙古河套灌区隆胜示范区为研究实例,选取隆胜示范区永刚分干和西济支渠衬砌段测流成果,采用两种近似方法计算渠道水利用系数,即采用渠道首端流量、单公里长度渗漏损失流量和渠道总长度3个参数估算渠道水利用系数,并分别与准确计算渠道水利用系数的方法首尾法即采用同时测流的渠道上下断面流量的计算方法比较,进行误差分析,提出了在缺乏资料前提下相对准确的近似计算渠道水利用系数的方法,用于灌区节水改造后渠道水利用系数的估算和预测,对于计算灌区节水潜力和评判灌区水利用效率都有着十分重要的意义。Taking Longsheng demonstration section of Hetao Irrigation Districts in Inner Mongolia as study example, according to the flow-measuring results of Yonggang Branch Canal and Xiji Branch Canal, two kinds of approximate calculation methods are used to calculate water use efficiency of canal and compared with the exact calculation method. Also, the error analysis is conducted and a correspondingly exact approximate calculation method for water use efficiency of canal under the condition of lacking information is put forward, which can be used to estimate water use efficiency of canal after water-saving reconstruction. It is significant for the calculation of water-saving potential and the evaluation of water use efficiency of irrigation districts.

关 键 词：渠道水利用系数 计算方法 误差分析 

分 类 号：S274[农业科学—农业水土工程]