기상조건에 따른 도시내 위험물질 확산정보와 보행자환경 위험영향평가 (Dispersal of Hazardous Substance in a City Environment Based on Weather Conditions and Its Risk Assessment at the Pedestrian Level)

김은령; 이광진 (Gwang-Jin Lee); 이채연 (Chaeyeon YI)

doi:10.14249/eia.2017.26.4.242

Dispersal of Hazardous Substance in a City Environment Based on Weather Conditions and Its Risk Assessment at the Pedestrian Level

Journal of Environmental Impact Assessment
Abbr : J EIA
2017, 26(4), pp.242-256
DOI : 10.14249/eia.2017.26.4.242
Publisher : Korean Society Of Environmental Impact Assessment
Research Area : Engineering > Environmental Engineering

김은령 ¹, Gwang-Jin Lee ¹, Chaeyeon YI ¹

¹한국외국어대학교 차세대도시농림융합기상사업단

Accredited

ABSTRACT

In this paper, dispersion scenarios concerning various meteorological conditions and real urban structures were made to estimate the impacts of hazardous substance leakage accidents and to reduce damages. Based on the scenario of the hazardous substance dispersion, the characteristics of the risk in the pedestrian environment were analyzed in Gangnam, Seoul. The scenarios are composed of 48 cases according to the meteorological conditions of wind direction and wind speed. In order to analyze the dispersion characteristics of the hazardous substances, simulations were conducted using a computational fluid dynamic (CFD) model with hydrogen fluoride releases. The validation for the simulated wind was conducted at a specific period, and all the calculated verification indices were within the valid range. As a result of simulated dispersion field at pedestrian level, it was found that the dispersion pattern was influenced by the flow, which was affected by the artificial obstacles. Also, in the case of the weakest wind speed of the inflow, the dispersion of the hazardous substance appeared in the direction of the windward side at the pedestrian level due to the reverse flow occurred at lower layers. Through this study, it can be seen that the artificial structures forming the city have a major impact on the flow formed in urban areas. The proposed approach can be used to simulate the dispersion of the hazardous substances and to assess the risk to pedestrians in the industrial complexes dealing with actual hazardous substances in the future.

KEYWORDS

CFD model, Pedestrian environment, Hazardous substance’s dispersion, Complex urban area

Citation status

* References for papers published after 2023 are currently being built.

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Journal of Environmental Impact Assessment 2023 KCI Impact Factor : 0.51

Dispersal of Hazardous Substance in a City Environment Based on Weather Conditions and Its Risk Assessment at the Pedestrian Level

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Citation status

* References for papers published after 2023 are currently being built.

Journal of Environmental Impact Assessment 2023 KCI Impact Factor : 0.51

Dispersal of Hazardous Substance in a City Environment Based on Weather Conditions and Its Risk Assessment at the Pedestrian Level

ABSTRACT

KEYWORDS

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