贡湖环湖带陆域污染源类型·负荷及空间分布

摘要

通过实地调研、资料解析等多种方式获取数据,对贡湖环湖带陆域源类型、负荷及空间分布进行深入研究.结果显示,目前贡湖环湖带主要污染物来源为工业污水、居民生活污染、农业径流、畜禽养殖废水、水产养殖排水、大气干湿沉降六大类型；贡湖环湖带每年产生并进入河网的污染负荷为:COD 2 568.79 t/a,NH3-N 219.05 t/a,TN 438.65 t/a,TP 30.11 t/a；污染负荷较重的区域有无锡市的华庄镇、南泉镇及苏州的镇湖街道.绝大部分污染物最终进入周边的河网,并经过主干河道汇入贡湖湾.%By methods of field investigation, material analysis, relevant data of terrestrial pollution source type, load and spatial distribution on the lake belt of Gonghu Bay are obtained and analyzed. The result shows that at present, the main terrestrial pollution sources in the research areas are industrial waste water, residential sewage, agricultural runoff, livestock waste water, aquaculture drainage and atmospheric bulk deposition; the pollution load which produced and emitted into the river each year are COD of 2 568. 79 t/a, NH3-N of 219.05 t/a, TN of 438.65 t/a, TP of 30. 11 t/a, respectively; the towns of Huazhuang, Nanquan, Zhenhu suffered a high pollution load. Most of the pollutants went into the surrounding river network, and then entered Gonghu Bay finally.