水功能区水质响应系数计算研究

水质响应系数是计算水环境容量,进而明确排污责任主体的重要基础。以一维对流扩散方程为基础,基于线性叠加原理,推导了水质响应系数矩阵,探讨了基于综合水动力水质模型的水功能区水质响应系数矩阵高效计算方法。基于HEC-RAS模型建立了辽河干流水动力水质模型,据此计算了辽河干流水功能区水质响应系数矩阵。结果表明:基于综合水动力水质模型的水功能区水质响应系数矩阵高效计算方法可显著提高计算效率,而且HECRAS模型不仅在水动力模拟方面优势显著,在水质模拟方面亦表现出良好特性。较之公式法,基于综合水动力水质模型计算水功能区水质响应系数可以显著提高计算精度。

Calculating the water quality response coefficient of water functional zone

The w ater quality respo nse coefficient is a cr itical foundatio n fo r both calculating wat er env ir onmental capacity and i2 dentify ing the responsible bo dy . Based on 12D co nv ect ion2diffusion equat ion and linea r superposit ion principle, the w ater quality response co efficient matr ix w as established. Efficient calculatio n method o f w ater quality r esponse coefficient of wat er functional zo ne w as studied, which based on comprehensiv e hydro dy namic and w ater qualit y model. Based on H EC2RAS, the hydr odynamic and w ater quality model of Lihao Riv er was built. T hen the w ater quality response coefficient matrix was calculated on the mod2 el. T he r esults pr oved that it is an efficient metho d to calculat e the water qualit y response coefficient matr ix of water functional zo ne by the comprehensive hydro dy namic and w ater quality mo del. T he H EC2RAS model could be used in water qualit y model2 ing . In addition, the calculatio n accur acy co uld be sig nificant ly impro ved by the method w hen calculate the water quality r esponse coefficient of w ater funct ional zone.