基于水质目标管理的涑水河水环境容量研究

Study on the environmental capacity of Sushui River water quality based on target management

应用水质目标管理技术方法,研究涑水河水环境容量计算及分配,污染负荷削减等关键技术,实现涑水河污染物减排。建立涑水河水动力水质模型,结合实际监测资料,进行模型率定和验证,并对涑水河在95%、75%、50%保证率下,各断面COD、NH_3—N水环境容量的研究。COD水环境容量在95%、75%、50%频率年分别为:-6802.037、-5891.560、-5203.764 t/a;NH_3—N水环境容量在95%、75%、50%频率年分别为:-3328.943、-2070.057、-1821.376 t/a。需要对其进行污染物削减,确定涑水河污染物的削减量,COD在特枯年、枯水年和平水年削减量分别2103.75、1926.58、1702.33 t/a;NH_3—N削减量分别是927.07、605.31、546.29 t/a。将水质目标管理技术运用在涑水河水环境容量研究中,为流域环境水质改善提供技术支撑。

By applying water quality target management method this paper studied the water environmental capacity calculation and distribution of Sushui river,the key technologies of reducing pollution load,so as to reduce the emission of Sushui River pollutants.We established a hydrodynamic water quality model of Sushui River,combining with actual monitoring data,the model calibration and verification was conducted,and the environmental capacity of COD and NH_3—N in the section of the water at 95%,75% and 50%guarantee rate was investigated.The water environmental capacity of COD in the frequency year of 95% 、75% 、50% were-6802.037 t/a,-5891.560 t/a,-5203.764 t/a,respectively.NH_3—N water environmental capacity in the frequency year of 95%,75%,50% were-3328.943 t/a,-2070.057 t/a,-1821.376 t/a respectively.It is necessary to reduce the pollutants and determine the reduction of Sushui River pollutants,the reduction of COD in extremely dry year,dry year and normal flow were 2103.75 t/a,1926.58 t/a and 1702.33 t/a respectively,and the ammonia reduction were 927.07 t/a,605.31 t/a,546.29 t/a.The water quality target management technology can be used in the study of water environmental capacity of Sushui River,which can provide technical support for water quality improvement.