Agriculturaldrainage is one of important contributors of non-point source pollution, and it is difficult to treat in practice due to its dispersed nature.
农田排水是造成农业非点源污染的一个重要来源，由于其具有分散性而难以人为控制。
2
At home, it is widely used in cable casing, construction drainage, agriculturaldrainage, irrigation, chemical industry, medicine and ventilation ducts and so on.
国内广泛应用于电缆套管、建筑排水管、农用排水管、灌溉、化工、医药及通风管道等方面。
3
AQUASTAT Country Profiles describe the state of water resources and agricultural water use with special attention to the water resource, irrigation, and drainage sub-sectors.