集雨灌溉说的是将雨水集蓄起来进行农田灌溉。其中就集雨而言，从广义讲，凡是集蓄雨水的工程都应称为集雨工程。但我们这里讲的是年降雨量只有２００～４００ｍｍ的我国干旱、半干旱地区，为了人的生活需要和灌溉少量面积农作物，利用一定的集雨面积，将雨水收集于水窖、涝地 Rainwater harvesting means collecting rainwater for farmland irrigation. For rainwater harvesting purposes, in a broad sense, all rainwater harvesting works should be called rainwater harvesting works. But here we are talking about the arid and semi-arid areas in our country where the annual rainfall is only 200-400 mm. In order to meet the needs of human life and to irrigate a small area of ​​crops, we use a certain catchment area to collect rainwater in cellars and floodplains