Based on field survey,it is identified that the non-point sources of Wuli Lake are from urban roads,residential areas,agriculture,and fertilization of greensward.

• 现场调查显示,五里湖非点源污染物来源于城区道路、居民区、农业和绿化施肥等方面,在降雨时通过河道、湖周散流和大气沉降方式入湖。