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运用ArcGIS软件解译大伙房水库汇水区的卫星影像数据,结合行政区划图确定汇水区3条主要河流两岸1000m为农村生活污染负荷评估范围,采用排污系数法估算农村生活污染负荷。结果表明,研究区农村生活污染负荷为8420.28t/a,其中,生活污水的污染负荷占总量的99.40%。农村生活污染对流域水质的贡献率为27.84%,所排放的污染物对河流的贡献率大小依次是氨氮(34.95%)、总磷(27.81%)、化学需氧量(25.53%)和总氮(23.08%),农村生活污染已成为大伙房水库汇水区水体污染的重要源。
Using ArcGIS software to interpret satellite image data of Dahuofang reservoir catchment area, combined with administrative zoning map to determine 1000m across the three major rivers in catchment area as rural life pollution load assessment range, using sewage discharge coefficient method to estimate rural household pollution load. The results showed that the pollution load of rural life in the study area was 8420.28t / a, of which the pollution load of domestic sewage accounted for 99.40% of the total. The contribution rate of rural life pollution to water quality in the basin is 27.84%. The contribution rate of pollutants discharged to rivers is ammonia (34.95%), total phosphorus (27.81%), chemical oxygen demand (25.53%) and total nitrogen (23.08%). Rural life pollution has become an important source of water pollution in the catchment area of Dahuofang Reservoir.