论文部分内容阅读
1小型农村水利的现状通常把灌溉面积0．07万hm~2、除涝面积0．2万hm~2、渠道流量1m~3/s以下的工程界定为小型农村水利工程。其种类和功能很多,大体可归纳为以下几类:小水库、塘坝、水池等蓄水设施,小型拦河闸坝、引水闸、截潜流等引水设施,渠道、管道、闸门等输水配水设施,渡槽、隧洞、倒虹吸、桥、涵等交叉建筑物,泵站、机井等提水设施,灌水沟、畦、喷灌、滴灌、闸管、“小白龙”
1 Current status of small-scale rural water conservancy projects are generally defined as small-scale rural water conservancy projects with an irrigation area of 0.07 million hm 2, a waterlogging area of 0.2 million hm 2, and a channel flow of 1 m -3 / s or less. Its types and functions are many and can be summarized into the following categories: water storage facilities such as small reservoirs, ponds and ponds, water diversion facilities such as small sluice gates, diversion gates and submarine-flow basins, water distribution and distribution facilities such as channels, pipes and gates Crossing buildings such as aqueducts, tunnels, tunnels, inverted siphons, bridges and culverts, water pumping facilities such as pumping stations and machine wells, irrigation ditches, shoals, sprinkler irrigation, drip irrigation and flood control,