基于MIKE11模型的十五里河动态水环境容量分析

为寻求分析水环境容量的动态特性，以合肥市重点水域十五里河为研究对象，针对主要的污染物指标氨氮和总磷，基于MIKE11水质模型水动力模块（HD）和对流扩散（AD模块），构建水动力水质耦合模型，计算河流的水环境容量，并与传统一维模型计算方法对比。研究表明，基于MIKE11水质模型计算金寨路断面氨氮和总磷的月均水环境容量分别是-2.83 g·s^-1和-5.86 g·s^-1，希望桥断面氨氮和总磷的月均水环境容量分别是-15.64 g·s^-1和-1.07 g·s^-1，与一维模型相比呈现出明显的动态特性。该方法为MIKE11模型的广泛应用提供基础，并为十五里河动态水环境容量计算提供新方法，为其他类似污染河流动态水环境容量的计算提供新思路。

Dynamic water environmental capacity of the Shiwuli River based on a MIKE11 model

To analyze the dynamic characteristics of changes in water environment capacity, this paper takes the Shiwuli River, one of key waters in Hefei, as the research object. Moreover, aiming at the main pollutant index ammonia nitrogen and total phosphorus, the hydro-water quality coupling model, based on the MIKE11 water quality model HD module and AD module, is constructed to calculate the water environment of the river capacity. In the meantime, it is compared with the traditional one-dimensional model calculation method. The results showed that the water environment capacity of the Shiwuli River based on the MIKE11 water quality model shows obvious dynamic characteristics. The monthly average water environmental capacity of ammonia nitrogen and total phosphorus in the Jinzhai Road section are -2.83 g·s^-1 and -5.86 g·s^-1 respectively, while what is in the bridge section is -15.64 g·s^-1 and -1.07 g·s^-1 respectively. It has higher calculation accuracy than the one-dimensional model. All in all, this method not only provides the basis of widely using MIKE11 model, but offers a new way to calculate the dynamic water environment capacity of the Shiwuli River. Most importantly, a new idea for the calculation of dynamic water environment capacity can be adopted by other similar polluted rivers.