Kim Geonha, Choi Euiso, Lee Dongryul
Department of Civil and Environmental Engineering, Hannam University, Ojungdong, Daejon, South Korea, 306-791.
Sci Total Environ. 2005 Nov 1;350(1-3):94-105. doi: 10.1016/j.scitotenv.2005.01.021.
The pathogens originating from diffuse pollution have raised much concern recently. In many countries, pathogen levels are monitored in surface water by measuring the pathogen indicator organism level, which indicates the concentration of pathogen associated microorganisms to determine contamination. Among indicator organisms, total coliform, fecal coliform, and Escherichia coli were selected for study, and their concentration as well as their flow rate were monitored at monitoring stations from October, 2001 to April, 2003. Monitoring stations include six sampling stations in the Geum River, two small watersheds used for forestry and agricultural land, one large wastewater treatment plant, one separate sewer overflow site, and one separate sewer overflow site in the Geum River basin. The coliform concentration of the combined sewer overflow was the highest, followed by the runoff from agricultural land use, the separate sewer overflow, and the runoff from forestry land use. The Pearson correlation coefficient for flow rate against total coliform concentration was 0.71 and was significant at 0.01 level, while the Pearson coefficient for other water quality constituents showed weak correlation (-0.36 to +0.37) against flow rate. Coliform concentration showed higher correlation against suspended solid concentration or flow rate during storm flow condition than during low flow condition. Two different relationship lines could explain the relationships between the flow rate and coliform loadings. Load duration curve technique was presented to assess the relative contributions of diffuse and point source pollution to the pathogen level at monitoring sites in the Geum River.
近年来，源自面源污染的病原体备受关注。在许多国家，通过测量病原体指示生物水平来监测地表水中的病原体水平，该水平指示与病原体相关微生物的浓度以确定污染情况。在指示生物中，选择了总大肠菌群、粪大肠菌群和大肠杆菌进行研究，并于2001年10月至2003年4月在监测站监测了它们的浓度及其流量。监测站包括锦江的六个采样站、两个用于林业和农业用地的小流域、一个大型污水处理厂、一个独立下水道溢流点以及锦江河 basin的一个独立下水道溢流点。合流制下水道溢流的大肠菌群浓度最高，其次是农业用地径流、独立下水道溢流和林业用地径流。流量与总大肠菌群浓度的皮尔逊相关系数为0.71，在0.01水平上具有显著性，而其他水质成分的皮尔逊系数与流量的相关性较弱（-0.36至+0.37）。与低流量条件相比，暴雨径流条件下大肠菌群浓度与悬浮固体浓度或流量的相关性更高。两条不同的关系线可以解释流量与大肠菌群负荷之间的关系。提出了负荷历时曲线技术来评估面源和点源污染对锦江监测点病原体水平的相对贡献。
