周公宅山区性水库流域污染物空间分析与治理

Pollutants Spatial Analysis and Management in Mountainous Reservoir Watershed of Zhou Gong-zhai

以周公宅水库流域污染源的调查数据为依据,运用排污系数法和GIS的空间分区统计法,引入负荷污染密度概念,研究了流域污染量及其构成、负荷空间分布和污染治理措施。结果表明,农业面源和生活污染源为流域主要污染源,主要沿周公宅水库环形分布。流域CODCr入河量为599.5 t/a,氨氮为18.6 t/a,总氮为91.9 t/a,总磷为3.2 t/a。水库流域内CODCr、氨氮、总氮、总磷污染负荷污染密度分布比较相似。CODCr污染密度主要集中在5.282～4.287 t/km2,氨氮在0.190～0.121 t/km2,总氮在0.830～0.380 t/km2,总磷在0.038～0.014 t/km2。

According to the survey data of pollutant sources in Zhougongzhai reservoir watershed, utilizing discharge coefficient method and spatial partitions of statistical method as GIS, and introducing the concept of pollution density, the aim was to study pollutional load and its composition, spatial distribution of the load, and pollution control measures. The results show that agricultural non - point sources and domestic pollution sources are the main sources in the reservoir watershed, the distribution along the reservoir is a ring. The volume of CODcr is 599.5 t/a, NH3 - N is 18.6 t/a, TN is 91.9 t/a, TP is 3.2 t/a. CODcr, NH3 - N, TN, and TP distributions about pollution density of load are quite similar. CODCr pollution density is mainly concentrated in 5.282～4.287 t/km2, NH3 - N is 0.190～0.121 t/km2, TN is 0.830～0.380 t/km2, TP is 0.038～0.014 t/km2.