王港河流域水环境质量溯源调查分析

Investigation and Analysis of Water Environment Quality Traceability in Wangang River Basin

以王港河流域为研究对象,根据2016—2020年、2021年1月29日—31日2个时间段的水质历史监测数据、2020年高分遥感影像解译结果和对高锰酸盐指数、化学需氧量、氨氮、总磷指标的加密监测数据及现场核查,对王港河流域水环境质量范围进行了溯源调查分析。结果表明,2016—2020年,王港河流域水质逐年好转;遥感解译共289个工业企业地块,102个水产养殖地块,169个畜禽养殖地块,92个疑似污染水体地块;王港河流域上游水质明显好于下游,下游沿线支流水质较差,畜禽养殖污染占比较高,是影响水质的主要原因,此外,沿河乡镇生活污水和工业污水收集处理效率低,以及工业园区工业污染源、农场农田退水、水产养殖排水也是影响水质的重要原因。

Taking Wanggang River Basin as the research object,according to the historical monitoring data of water quality,the interpretation results of high-resolution remote sensing images and the densified monitoring data and on-site verification of the indicators of permanganate index,chemical oxygen demand,ammonia nitrogen and total phosphorus during the period of 2016—2020 and January 29—31,2021,the water environment quality range of Wanggang River Basin was investigated and analyzed. The results showed that the water quality of the Wanggang River Basin has improved from 2016 to 2020;remote sensing interpretation has a total of 289 industrial enterprise plots,102 aquaculture plots,169 livestock and poultry farming plots,and 92 suspected polluted plots;the water quality in the upper reaches of Wanggang River Basin was obviously better than that in the lower reaches,and the tributaries along the lower reaches were worse. The high proportion of pollution from livestock and poultry breeding was the main reason affecting the water quality. In addition,the low processing efficiency of domestic sewage and industrial sewage from the villages and towns along the river,the industrial pollution sources of industrial park,farm fields water and acquculture effluent are also the main reasons that influence the water quality.