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Toxic gas clouds: Effects and implications of dry deposition onconcentration
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering, Applied Process Metallurgy.
FOI, CBRN Defence and Security.
FOI, CBRN Defence and Security.
2005 (English)In: Journal of Hazardous Materials, ISSN 0304-3894, E-ISSN 1873-3336, Vol. 124, no 1-3, 1-18 p.Article in journal (Refereed) Published
Abstract [en]

The influence of the dry deposition process on concentration pertaining to toxic gas clouds was investigated by model calculations. Three main release scenarios were simulated, with nine micrometeorological cases considered for each. To compare and confirm the results, two model types, a stochastic particle model and a box-type model, were independently used to simulate many of the different cases. The results showed that the effects of dry deposition may be strong for releases at, or confined close to the ground, e.g. neutral or unstable stratification can cause higher concentrations than stable stratification after 10–15 km. Risk distances are in turn affected and may be substantially shortened, e.g. for a zero-height release like that from an evaporating pool, a 50% reduction in total airborne substance may occur within 500 m at a low wind velocity and neutral or stable stratification

Place, publisher, year, edition, pages
2005. Vol. 124, no 1-3, 1-18 p.
Keyword [en]
Dry deposition, Toxic gas clouds, Stochastic particle model, Risk distance, Box model
National Category
Other Physics Topics
URN: urn:nbn:se:kth:diva-118669DOI: 10.1016/j.hazmat.2005.04.018ISI: 000231403600001OAI: diva2:607132

QC 20130222

Available from: 2013-02-21 Created: 2013-02-21 Last updated: 2014-05-23Bibliographically approved

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