干旱区多沙河流引水续灌沉沙排沙池一体化设计试验研究  

Optimization of Calculation Formula for Sedimentation Rate of the Continuous Sedimentation Tank

作　　者：李林[1] 张斌[1] LI Lin;ZHANG Bin(College of Water Conservancy and Architectural Engineering,Tarim University,Alar 843300,Xinjiang,China)

机构地区：[1]塔里木大学水利与建筑工程学院,新疆阿拉尔843300

出　　处：《中国农村水利水电》2021年第9期106-111,共6页China Rural Water and Hydropower

基　　金：国家自然科学基金重点项目(51439006)。

摘　　要：针对我国塔里木河上游南疆地区灌溉引水含沙量大、严重影响灌区渠系正常供水等问题。通过在一维流超饱和输沙法基础上对连续式沉沙池计算方法进行理论修正和优化,提出了一种干旱区多沙河流引水连续灌溉-沉沙-排沙池一体化改进设计方法。试验研究表明,该方法的计算结果与试验结果相对误差均小于5%;随着连续沉沙池段的增加,其相对误差减少;随着灌溉引水流量和含沙量的增加,其相对误差呈先减小后增加趋势,从而解决目前多沙河流取引水连续沉沙池的沉沙率计算方法误差大问题,消除了多沙河流取引水易造成渠道泥沙淤积影响,有利于保证连续灌溉用水需求,实现了干旱区灌溉引水、减沙、防淤、可持续发展。In order to solve the problems of large sediment concentration in irrigation water diversion in the southern Xinjiang of the upper reaches of Tarim River,which seriously affects the normal water supply of irrigation canal system in irrigation area.This paper theoretically modifies and optimizes the calculation method of continuous sedimentation tank on the basis of one-dimensional flow supersaturated sedi⁃ment transport method,and proposes an improved integrated design method of continuous irrigation sediment discharge basin for sediment laden rivers in arid area.The experimental results show that the relative errors between the calculation results and the experimental results are less than 5%.With the increase in continuous sedimentation tank section,the relative error decreases.With the increase in irrigation diversion flow and sediment concentration,the relative error decreases at first and then increases.Thus it can solve the problem of large error in the calculation method of sedimentation rate of continuous sedimentation tank for water intake and diversion of sediment laden river,elimi⁃nate the influence of channel sediment deposition caused by water intake and diversion of sediment laden river,and ensure the water demand for continuous irrigation,and realize irrigation diversion,sediment reduction,sediment prevention and sustainable development in arid areas.

关 键 词：干旱区 多沙河流 灌溉引水 连续沉沙池设计 沉沙率 

分 类 号：TV15[水利工程—水力学及河流动力学] S277[农业科学—农业水土工程]