| Summary: | 碩士 === 中興大學 === 環境工程學系所 === 99 === Taichung Harbor West Docks area, the designated chemical storage and docking area, deposits more than 200 material storage tanks containing over 130 chemical substances. A proper management plan of hazardous material, including a variety of toxic chemicals, are urgently needed. The objective of this study was to utilize a plume-dispersion model, including Aerial Locations of Hazardous Atmospheres (ALOHA) and SLAB programs, to predict the spread of chemical vapors. The data generated by the ALOHA and SLAB was used to creat a footprint that was exported and overlaid on Google Earth unit to determine the potential impact of catastrophic chemical releases on nearby communities. This research aims to simulate the situation following emergent shut-down of equipments and security systems and the subsequent catastrophic leak of toxic gas vapors in central Taiwan. According to the imitated result, we examine the fitness of current safety device and potential risk areas. Specifically, we aimed to
1．Analyze the span of area following catastrophic leak of toxic gas vapors;
2.．Explore the effect of seasonal variation on the distance of the spread of toxic vapors;
3．Examine and to evaluate the fitness of the simulation results generated by ALOHA and SLAB
Results were summarized as follows:
1．The extent of the spread of toxic vapors as evaluated by ALOHA and SLAB followed the rank order: Allyl Alcohol''s > Toluene diisocyanate''s.
2．Seasonal varivation in weather pattern will affect on the distance of the spread of toxic vapors where the magnitude of the spread of toxic vapors in summer is greater than that in winter.
3．The extent of the spread of toxic vapors predominantly determines by temperature rather than wind speed. Typically, the distance of the spread of toxic vapors increases with increased temperature.
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