基于GIS技术的农村非点源污染分析——以渠县境内巴河州河汇流断面上游区域为例
发布时间：2018-07-26 07:12
【摘要】：为了有效地分析巴河州河汇合口(渠县境内)以上流域非点源污染问题,应用GIS技术进行水文分析(水系提取、流域划分)以及污染源的空间分异分析。基于评估区的水环境污染现状,选取城镇居民生活污水、农村居民生活污水、城镇地表径流、集中式畜禽养殖、化肥污染五大污染源,采用源强系数法和输出系数法进行COD、TN、TP 3种污染物的流失量计算,并分析其污染负荷,。结果表明:(1)评估区的91.93%的负荷来源于为农村居民生活污水、化肥污染、和城镇居民生活污水,最主要的污染源为农村居民生活污水。(2)评估区重点治理乡镇为三汇镇。研究成果较为清晰地分析出研究区非点源污染的分布情况,指出了需要重点治理的地域和污染源。
[Abstract]:In order to effectively analyze the problem of non-point source pollution in the catchment above Huikou (Quxian County) of Bahe River, the hydrological analysis (drainage system extraction, watershed division) and spatial differentiation analysis of pollution sources are carried out by using GIS technology. Based on the present situation of water environment pollution in the assessment area, five major sources of pollution were selected, including urban domestic sewage, rural domestic sewage, urban surface runoff, centralized livestock and poultry farming, and chemical fertilizer pollution. The source strength coefficient method and the output coefficient method were used to calculate the loss of three kinds of pollutants, and the pollution load was analyzed. The results showed that: (1) 91.93% of the load in the assessment area came from rural residents' domestic sewage, chemical fertilizer pollution, and urban residents' domestic sewage, the main source of pollution was rural residents' domestic sewage, and (2) Sanhui Town was the main source of pollution in the assessment area. The distribution of non-point source pollution in the study area is analyzed clearly, and the areas and pollution sources which need to be controlled are pointed out.
【作者单位】： 四川大学水力学与山区河流开发保护国家重点实验室;四川大学水利水电学院;
【基金】：四川省科技计划项目“四川省中小流域农村面源污染综合防治技术研究与示范项目(2015SZ0212)”
【分类号】：P208;X52
[Abstract]:In order to effectively analyze the problem of non-point source pollution in the catchment above Huikou (Quxian County) of Bahe River, the hydrological analysis (drainage system extraction, watershed division) and spatial differentiation analysis of pollution sources are carried out by using GIS technology. Based on the present situation of water environment pollution in the assessment area, five major sources of pollution were selected, including urban domestic sewage, rural domestic sewage, urban surface runoff, centralized livestock and poultry farming, and chemical fertilizer pollution. The source strength coefficient method and the output coefficient method were used to calculate the loss of three kinds of pollutants, and the pollution load was analyzed. The results showed that: (1) 91.93% of the load in the assessment area came from rural residents' domestic sewage, chemical fertilizer pollution, and urban residents' domestic sewage, the main source of pollution was rural residents' domestic sewage, and (2) Sanhui Town was the main source of pollution in the assessment area. The distribution of non-point source pollution in the study area is analyzed clearly, and the areas and pollution sources which need to be controlled are pointed out.
【作者单位】： 四川大学水力学与山区河流开发保护国家重点实验室;四川大学水利水电学院;
【基金】：四川省科技计划项目“四川省中小流域农村面源污染综合防治技术研究与示范项目(2015SZ0212)”
【分类号】：P208;X52
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