大气扩散模型AERMOD与CALPUFF对比研究及展望  

Comparison and Perspectives on Theories and Simulation Results of Gas Dispersion Models AERMOD and CALPUFF

作　　者：李梅[1] 杨冬偶 何望君[2] LI Mei;YANG Dong'ou;HE Wangjun(Institute of Remote Sensing and Geographical Information System,Peking University,Beijing 100871,China;Chinese Academy of Surveying and Mapping,Beijing 100830,China)

机构地区：[1]北京大学遥感与地理信息系统研究所,北京100871 [2]中国测绘科学研究院,北京100830

出　　处：《武汉大学学报（信息科学版）》2020年第8期1245-1254,共10页Geomatics and Information Science of Wuhan University

基　　金：国家重点研发计划(2016YFC0803108);国家自然科学基金(51774281)。

摘　　要：近年来,大气扩散模型及其计算机应用集成技术成为环境评价、防灾减灾和应急管理的重要研究内容。应急管理领域对气体扩散的时空分辨率和计算速度要求较高。在实际应用中,由于各种大气扩散模型的适用条件不同、参数复杂,如何结合自身需求选择合适的模型成了应急响应辅助分析的首要问题。针对两个常见大气扩散模型AERMOD和CALPUFF进行分析和对比研究。首先,介绍了两个模型的原理;然后,设计了4组对比实验,利用实验结果分析了两个模型之间的异同;最后,对两个模型各自适用的情景进行了分析。研究结果表明,CALPUFF更适用于面向应急管理的高时空分辨率计算要求。Objectives:In recent years,atmospheric dispersion models have become important research contents in environmental assessment,disaster prevention and mitigation,and emergency management.At present,mainstream environmental quality regulations models include the AERMOD model and CALPUFF model recommended by the U.S.Environmental Protection Agency(EPA).These models are widely used in environmental assessment and atmospheric environmental quality assessment,but rarely used in toxic gas dispersion simulation and decision support in emergency response.The objective of this article is to compare the differences between the two models and give ideas for future development of expanding the atmospheric dispersion model to the field of emergency response.Methods:First,the basic theories of the two models are introduced and analyzed.Then,four comparative experiments are designed and carried out.Experiment 1 is designed to observe whether the pollutants existing in the original wind direction will accumulate to the next moment and affect the new concentration distribution after the sudden change of wind direction in the two models.Experiment 2 is designed to observe the processing capacity of the two models for static wind.Experiment 3 is designed to observe the results of the two models in two different dispersion scales.Experiment 4 is designed to compare the calculation speed of the two models after greatly increasing the spatial resolution.Results:Experiment 1 shows that the simulation results of the CALPUFF model for sudden changes in wind direction are more reasonable than the AERMOD model.Experiment 2 shows that the simulation results of CALPUFF for special wind fields,such as breeze,are more reasonable than AERMOD.Experiment 3 shows that AERMOD is not suitable for cases where the experimental range exceeds 50 km,and within 50 km,the simulation results of both models are acceptable.Experiment 4 shows that after greatly improving the mesh resolution,the time-consuming increase in AERMOD is not large,while the time-consum

关 键 词：大气扩散模型 AERMOD CALPUFF 对比研究 应急响应 

分 类 号：P237[天文地球—摄影测量与遥感]