公路运输有毒物泄漏造成水体污染的数学模型及求解方法研究

Study on the Mathematical Model of Water Pollution and Solution Method by the Highway Transportation with the Poison to Leak Causes

公路运送有毒物发生交通事故导致有毒物泄漏引发水体污染会造成严重影响.首先分析了污染事故的特点,危害.然后根据水力学及污染物的迁移转化规律,建立了有毒物泄漏水体后的弥散数学模型,即将控制水流的圣维南方程和描述有毒物迁移的对流弥散方程进行耦合.运用低数值耗散的半离散中心迎风格式求解方程,其结果可以预测污染河段长度和延续时间.最后通过实例进行了模拟计算.

Transporting of toxic traffic accidents cause the toxic leaks cause water pollu- tion will be a serious impact. This paper first analyzes the characteristics and hazards of pollution incidents. Then according to the law of hydraulics and pollutant transport and transformation, the establishment of a toxic leak water transfer dispersion model, about to control the flow of the St. Venant equations and description poison migration of convection dispersion equation coupled. Low numerical dissipation semi-discrete central upwind scheme for solving equations, its results can predict the length and duration of the polluted river. Finally has carried on the simulation through an example