The Distributed Physical Processes And Modelling Of Heavy Metal Pollution On Xiangjiang River Baesd On GIS

Abstract:Heavy metal pollutants to the water system by way of soil, air and industrial, and through the three ways of convergence, heavy metals eventually flow with water movement. It’s a very important process that heavy metals diffuse into water. This paper introduces the ideas of the porous medium to elaborate the diffusion principle. Modeling soil as a porous medium, combining with the characteristics of the soil porous media and simplifying and improving the model, it finally obtains the mathematical model of the process of convergence in water.Heavy metals have migration and conversion actions gathering in the water. In the water, there exist three forms of heavy metals, and using micro-element mathematical thinking, mathematical model is established in the water migration and conversion of heavy metal tri-state and combined with Fourier and inverse algorithm to draw the analytical solution of the model. From the single point source and multi-source point of view describe the pollution emissions. Two-dimensional single-point source of heavy metal pollutants model uses the basic mathematical model and the mathematical model of multi-point source pollution computational has complexity and amount of data. In this paper, using segmentation and ideological overlay ideas and breading multi-point source pollution into single-point source simulates multi-point source pollution process.Using GIS-tech and objecting to Xiangjiang, the heavy metal pollutants distributed mathematical model is achieved and established the Xiangjiang heavy metal pollutants distributed physical processes GIS system. The whole system consists of two parts of the management system with map display.