• May 2020
    Atmosphere Issue Cover : Accidental Dispersion of Hazardous Air Pollutants in the Urban Area
  • Global Climate Model
  • Climate Dynamics
  • Urban Environment
  • Global Carbon Cycle
  • Seasonal Prediction
  • GloSea System Hindcast Diagnostics
LATEST RESEARCH
Numerical Modeling for the Accidental Dispersion of Hazardous Air Pollutants in the Urban Metropolitan Area Ganghan Kim , Myong-In Lee* , Seunghee Lee...
2020/06/08
PHOTO NEWS
2014/11/20 UEE Seminar: Prof. Soon...
2014/10/27~29 KIAPS International ...
2014/04/21~22 한국기상학회 봄학술대회
SPONSORED BY
PUBLICATIONS

국제학술지 (SCI Journals)

[72] Kim, G., M.-I. Lee**, S. Lee, S.-D. Choi, S.-J. Kim, and C.-K. Song, 2020: Numerical Modeling for the Accidental Dispersion of Hazardous Air Pollutan...
2020/06/08
NEWS / EVENTS
[공지] 기후환경모델링 연구실 2020년 하... 2020/02/16
[BBC] Is climate change ... 2018/01/08
[중앙일보] 올해도 '폭염장마' ... 작년... 2017/07/10
[중앙일보] 온난화 탓 소리없는 재앙 '폭염... 2017/07/10
[Weekly 공감] 폭염-열대야 예측 이명... 2017/07/10
UNIST-gil 50, Ulsan, zipcode: 44919, Republic of Korea, Bldg. 110 Room. 1003-2
Copyrightⓒ UCEM All Rights RESERVED
E-mail: milee@unist.ac.kr

LOGIN

Back to Top
LATEST RESEARCH

Numerical Modeling for the Accidental Dispersion of Hazardous Air Pollutants in the Urban Metropolitan Area

 

Numerical Modeling for the Accidental Dispersion of Hazardous Air Pollutants in the Urban Metropolitan Area
 

Ganghan Kim , Myong-In Lee* , Seunghee Lee , Sung-Deuk Choi, Sung-Joon Kim and Chang-Keun Song

School of Urban and Environmental Engineering, Ulsan National Institute of Science and Technology, Ulsan, Republic of Korea

 

Abstract

  A numerical simulation system is developed to predict the dispersion of hazardous air pollutants (HAPs) over a populated city due to accidental release. Ulsan, as one of the megacities in Korea, is chosen as an ideal testbed for the simulation, as it is located in complex terrain and hosts a national industrial complex on the outskirts of the city. The system is based on the California puff model (CALPUFF) for simulating a HAP’s dispersion, in which the three-dimensional atmospheric circulation derived from the observed weather station data is specified at a fine horizontal resolution of 200 m. A test scenario is developed for the accidental release of benzene during the daytime and nighttime, respectively, by a fictitious explosion of a storage container, and the injection amount is determined arbitrarily yet comparable to those in the past accidents. In attempting a quantitative assessment and zoning the level of potential risk over the impacted area, multiple simulations have been conducted each day with different hourly varying meteorological conditions in August. The dispersion characteristics of the air pollutant depend largely on the local wind patterns that vary substantially from day to day. Nevertheless, the composite analysis sufficiently identifies the impacted area by the HAP’s dispersion due to the local prevailing wind such as the land–sea breeze circulation. An immediate hazardous area is determined based on the vulnerability map constructed by zoning the level of risk determined by the spatial distribution of the HAPs’ concentration and the harmfulness standard to the human body.