口岸化学因子事件危害范围的模拟研究

Simulation Study of Chemical Aerosols' Diffusion at Frontier Ports

目的通过高斯扩散模型研究口岸化学因子事件中的化学因子扩散模拟和污染区域的划分,为突发公共卫生事件应急处置提供科学依据。方法运用高斯扩散模型对口岸中化学因子的扩散进行计算机模拟,结合几个典型的化学毒剂的中毒浓度对扩散后气溶胶的浓度和分布进行污染区域的划分。结果通过对常见的化学有害因子包括沙林、梭曼、维埃克斯、芥子气、光气、氢氰酸进行模拟计算,可以得出不同气象、植被条件下化学毒剂的污染情况,准确划定风险区域。结论利用高斯扩散模型可以精确模拟出口岸化学因子的扩散并划分污染区域,为口岸突发公共卫生事件应急响应提供决策支持。

Objective The Gaussian diffusion model was used to simulate the diffusion of chemical aerosols and the division of contaminated areas in the chemical terrorist incidents at ports, so as to provide scientific support for public health emergencies. Methods The Gaussian diffusion model was used to simulate the diffusion of chemical agents at ports, and divide the concentration and distribution of the aerosol according to the harmful concentration of different chemical agents. Results By simulating the common chemical agents including sarin, soman, vx, mustard, phosgene and hydrocyanic acid, the pollution of chemical agents under different meteoro- logical and vegetation conditions can be obtained, and the risk areas can be accurately delineated. Conclusion The Gaussian diffusion model can be used to simulate the diffusion of chemical agents and to divide the contami- nated areas to provide the decision-making support for emergency response of public health emergencies.