Firstly, advantages and disadvantages of three familiar diffusion models for dangerous chemicals in atmosphere, namely Gauss Model, Sutton Model, FEW3 Model, are analyzed. With the specialties of little calculation and simpleness, Gauss Model is selected.

• 首先,分析了常见的危险化学品泄漏后在大气中的三种模型,即高斯模型、Sutton模型、FEW3模型的优缺点,由于高斯模型具有计算量少,且简单易理解等特点,本文选用高斯模型作为泄漏后的扩散模型。