摘要
调查了元江县2020年污染源结构及排放状况,结果表明:污染物排放量主要来源于面源,面源COD、NH3-N、TN、TP排放量分别占总排放量的76.63％、94.50％、91.07％、97.01％,而农田化肥排放量分别占面源排放总量的26.1％、65.3％、50.9％、65.5％.针对面源污染是影响元江水环境质量的主要问题,提出了强化农业面源治理、深化城乡点源治理、实施沿江而居174个村庄污染治理、推进垃圾焚烧发电厂(200 t/d)建设、实施干热河谷面山48.2 km2水土流失治理及生态修复5项精准防治管控措施.
Abstract
This paper investigated the pollution source structure and emission status of the year of 2020 in Yuanjiang County.The investigation indicated that the main source of pollutant emissions was non-point sources.The emissions of COD,NH3-N,TN,and TP from non-point sources accounted for 76.63％,94.50％,91.07％,and 97.01％of the total emissions,respectively.The emissions of agricultural fertilizers accounted for 26.1％,65.3％,50.9％,and 65.5％of the total emissions,respectively.In response to the fact that non-point source pollution was the main problem affecting the water environment quality of Yuanjiang River,it was proposed to strengthen agricultural non-point source control,to deepen urban-rural point source control,to implement pollution control in 174 villages along the river,to promote the construction of waste incineration power plants(200 t/d),and to implement five precise prevention and control measures for soil erosion control and ecological restoration of 48.2 km2 in dry and hot river valleys.
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