落蓬湾断面水质达标及胥河水环境容量研究

落蓬湾断面目前水质不能稳定达标。为进一步提高国家考核断面水质达标率,持续改善水环境质量,进而开展落蓬湾断面水质达标及胥河水环境容量计算研究。根据现状水文、水质和污染源资料,分析落蓬湾断面水质超标原因。采用控制断面达标法计算得到入胥河的最大允许排污量。结果表明:胥河COD、氨氮、总磷的近期水环境容量分别为3011.8、195.0、99.2 t/a,远期水环境容量分别为1738.7、135.9、70.0 t/a。基于胥河水环境容量计算结果,结合研究区域内入胥河的污染物量,确定研究区域各类污染物的削减比例,为胥河的水环境整治提供理论支撑。

The research of water quality standards at the Luopengwan section and water environment capacity in Xu River

The current water quality of Luopengwan section cannot reach the standard stably. In order to further improve the success rate of national assessment of water quality andcontinuously improve the water environment quality, the research on Luopengwan section of water quality and water environmental capacity calculation of Xu River was carried out. According to the analysis of present situation of hydrology, water quality and pollution source data, the reasons for exceeding the water quality standard of Luopengwan section were analyzed. We used the control section standard method to calculate the maximum permitted discharge amount into Xu river. The results show that the recent water environmental capacity of COD is 3011.8 t/a, the environmental capacity of NH₃-N is 195.0 t/a, and the environmental capacity of TP is 99.2 t/a. The forward water environmental capacity of COD is 1738.7 t/a, the environmental capacity of NH₃-N is 135.9 t/a, and the environmental capacity of TP is 70.0 t/a. According to the calculation results of water environmental capacity and the current situation of pollutants into the river, the proportion of pollutants to be reduced is calculated, so as to provide theoretical support for water environment regulation of Xu River.