基于MATLAB仿真模拟的单污染源扩散模型的优化研究

Study on Optimization of Single Pollution Diffusion Model Based on MATLAB Simulation

基于高斯扩散模型,自由扩散模型和线源扩散模型,运用Matlab和Mathcad软件对单污染源扩散模型进行了仿真模拟与计算,并运用此模型确定了任意时刻、任意地点的污染物浓度,进而得到特定时间点的空气污染浓度分布以及空气质量等级。结果表明,污染扩散比较集中在高度为60m左右的平面内,且主要集中在沿风向附近,并随着扩散距离的增加污染物浓度逐渐减少; 100m高度处的污染物浓度值和1000m高度处的污染物浓度值相差4个数量级,1000m范围和51000m范围浓度变化梯度明显;一天中早上和晚上两时间段污染物浓度最强,且晚10点到凌晨4点期间的排放浓度相对较强,在空间造成污染物积累。

Based on Gaussian diffusion model, free diffusion model and line source diffusion model, single pollution diffusion model are simulated by using Matlab software and Mathcad software; the concentration of pollutants is conformed any time anywhere. Air pollution concentration distribution and quality level at specific time are obtained. The results show that the pollution diffusion are focused on the plane of 60m, and mainly pointed to the direction of the wind; with the increase of the diffusion distance, the concentration of pollutants decreased; through a comparison between pollutants concentration of the plane of 100m and 1000m, it can be obtained that they have about four orders of magnitude difference; the change of the concentration gradient is regular in the range of 1 000 m and 51 000 m; The pollutants concentration is bigger both in the morning and evening, and the emission concentration of the pollutants is bigger from 10 p.m to 4 a.m, which causes the accumulation of pollutants in space