Pollutant Quantitative Tracing of River Water Quality Section Based on the Flux Contribution Method
In the context of water quality target management,it is necessary to trace the pollution sources that impact the water quality of riv-ers and lakes.Taking the Huangshui River basin as an example,pollution sources were classified and quantified as point sources and non-point sources.Based on the pollutant flux contribution tracing method,inventory analysis and output coefficient method were used to calculate the inflowing loads and contribution rates of ammonia nitrogen(NH3-N)and total phosphorus(TP)from point sources and non-point sources.By identifying the magnitude of contribution rates,the main types and locations of point sources were identified,and the non-point source pollution hotspots and key pollution source types were identified at the town scale.The results show that sewage treatment plants and industrial sources contribute the most to NH3-N,while large-scale livestock and poultry farming sources contribute the most to TP.Point sources are mainly distributed in the middle reaches of the Huangshui River and the main urban area of Xining.Point sources have a signifi-cantly greater impact on pollutant concentrations during the dry season than the rainy season.As for non-point sources,urban domestic sources in certain townships in the Huangshui River Basin are identified as significant contributors to NH3-N at the Bianqiang Village section.Non-point sources from some townships in the middle and upper reaches of the Huangshui River Basin have an important impact on TP at the Bianqiang Village section,with urban domestic sources and agricultural planting sources being important sources of TP.
pollution source tracingpoint sourcenon-point sourceammonia nitrogentotal phosphorusHuangshui River Basin
国家科技期刊平台
NSTL
万方数据
