红壤丘陵区典型流域地表水水环境特征研究——以浏阳河流域为例

选取浏阳河流域为例,根据近十年河流断面监测数据,采用改进的综合污染指数法来评价水质污染程度,研究了该红壤丘陵区典型河流水质的时空变化特征,并结合土地利用和土壤特征等分析地表水质变化原因。结果表明,改进的综合污染指数法有较好的适用性;从时间特征上看,由于面源污染加剧,使得浏阳河近十年的水质污染呈增长趋势;从空间特征上看,浏阳河从上游到下游,河流污染呈增长趋势,上游水质较好,中游表现为重金属铅和汞的污染较大,而下游则是氨氮污染加剧。

Temporal and Spatial Characteristics of Surface Water Quality of Typical Basin in Hilly Red Soil Region

Selecting the Liuyanghe watershed as an example,using river monitor data nearly ten years and the improved synthesis pollution index to evaluate the water quality,the research studied the temporal and spatial characteristics of surface water quality of typical basin in hilly red soil region,and analyzed reasons of the surface water quality change with land use and the soil characteristic.The result indicated the improved synthesis pollution index had a better serviceability.From the temporal characteristic,because of no-point pollution the water quality of Liuyanghe watershed was becoming serious nearly ten years.From the spatial characteristic,the pollution assumed increasing from the upstream to the downriver,water quality in upstream was better,the content of the heavy metal was bigger in the middle of the river,the pollution of ammonia nitrogen intensified in downriver.