多烟团模式在环境风险评价中的应用  

Application of Multi-Puff Model in Environmental Risk Assessment

作　　者：刘蕾[1] 彭量 张静雯 

机构地区：[1]广东省梅县气象局,梅县514700 [2]广东省梅州市气象局,梅州514021 [3]广州市环境技术中心,广州510055

出　　处：《气象科技》2010年第6期684-688,共5页Meteorological Science and Technology

摘　　要：应用多烟团模式,以硫化氢泄漏对大气影响为研究对象,模拟一起典型的突发性环境风险事故。并结合风对硫化氢的影响作用,预测出给定稳定度时,少量硫化氢泄漏所达到的最大落地浓度以及最大落地浓度点的下风向距离。分析表明,在同样的稳定度条件下,风速的不同会导致硫化氢扩散存在很大差异。并且在模拟过程中,少量的危险性气体硫化氢在大气中的扩散没有出现致死浓度,但存在一定的危害范围。因此,相关部门应当给予足够的重视,并对其周边环境以及居民做出相应的应急防范措施。The multi-puff model is used to simulate a typical sudden accident of environmental risk,with the emphasis on the hydrogen sulfide leak into the atmosphere.Combined with the impact of winds on the role of hydrogen sulfide at a given stability,the maximum landing concentration and the downwind distance of the maximum landing concentration point at a small amount of leakage of hydrogen sulfide are estimated.Analysis concludes that in the same stability conditions,different wind speeds will lead to great difference in the diffusion of hydrogen sulfide,In the simulation process,with the diffusion of a small amount of hydrogen sulfide gas in the atmosphere,though the lethal concentration did not appear,there is a certain risk of hazards.Therefore,the relevant departments should pay enough attention to this kind of air pollution,as well as the surrounding environment and human responses to take the corresponding preventive measures.

关 键 词：多烟团模式 风险 大气环境 风险评价 

分 类 号：X820.4[环境科学与工程—环境工程]