基于“河道—节点—河道”法的河网水量水质数学模型具有很高的效率，但到目前为止还没有与此求解方法相对应的河网水环境容量的求解方法，在对河网水质模型进行深入分析的基础上，引入节点污染物质允许进入量的概念，求出河网各河道河段及节点的允许排放量，建立了相应于上述水质模型的求解大型河网非稳态水环境容量的“节点—河道—节点”计算模式 The mathematical model of river network water quality based on the “river-node-river” method has high efficiency, but so far there is no solution to the water environment capacity of the river network. Therefore, Based on the deep analysis, the concept of permissible admittance of pollutants is introduced, the permissible discharges of river sections and nodes in the river network are determined, and the corresponding unsteady water environment capacity of large-scale river networks is established corresponding to the above water quality model The “node - river - node” calculation mode