渗渠取水量变化过程初步分析  

The Elementary Analyses of the Water Intake Variation Process of Seepage Channel

作　　者：程琨[1] 刘焕芳[2] 吕宏兴[3] 刘持峰[4] 

机构地区：[1]安徽省水利水电勘测设计院,安徽合肥230022 [2]新疆兵团绿洲生态农业重点实验室,新疆石河子832003 [3]西北农林科技大学水利建筑工程学院,陕西杨凌712100 [4]石河子大学水利建筑工程学院,新疆石河子832003

出　　处：《中国农村水利水电》2007年第8期39-41,44,共4页China Rural Water and Hydropower

基　　金：新疆生产建设兵团绿洲生态农业重点实验室开放课题发展基金(200506)

摘　　要：渗渠反滤层是由不同透水性、厚度不等的多层含水层组成,是典型的层状含水层。渗透水流在透水性突变的界面上,由于水流的连续性,引发界面上水流产生折射,使得各层含水层渗透水流在水平方向上的分流量存在差异,含水层平均水力梯度发生变化,渗透水流量随之发生变化。结合试验,运用水流折射定律,阐述了渗渠从闸阀开启之初到取水稳定的取水量变化过程以及产生这一过程的原因,当渗渠滤水管截取的渗流量等于表层滤层的渗透流量时,渗渠取水量便趋于稳定。Seepage Channel inverted filter is composed of multi-layered aquifer which has different hydraulic permeability and thickness.It is a typical layered water bearing strata.At the shunt permeability interface,water flow will reflect because of the continuity of water flow,which will induce variations in the diversion of seepage flow in the horizontal direction and in the averaged hydraulic gradient of the aquifer as well as in discharge of seepage flow.This paper applies law of reflection of water flow to explain the process of water quantity variation from the gate to stable intake and the reasons for this process integrating with experiment.When the water seepage intercepted by filtration pipe equals the seepage discharge infiltrated from the ground surface,the intake of the seepage channel will come to stable.

关 键 词：渗渠 折射定律 取水量变化 层状含水层 

分 类 号：TU991[建筑科学—市政工程] S276.74[农业科学—农业水土工程]