灌区控制地下水的水平排水系统设计

Horizontal Drainage System for Controlling Groundwater in Irrigation Area

在地下水位较高或有盐碱化威胁的灌区,必须修建控制地下水位的田间排水沟,以便降低地下水位或防止因灌溉、降雨和冲洗引起地下水位的大幅上升,防止渍害或土壤盐碱化。控制地下水位的田间工程,有水平排水和垂直排水两种形式,水平排水又可分为明沟和暗沟两种,着重介绍田间水平排水系统。

Farmland drainage system must be built in the irrigation areas where there is a high groundwater level or tend for soil salinization in order to lower groundwater level or control the dramatic raise of groundwater level and prevent the farmland from salinization due to irrigation,rainfall.There are two ways to control groundwater level in farmland,namely horizontal drainage and vertical drainage.The horizontal drainage system can be divided into open-channel and blind drainage.