HAZDIG: a new software package for assessing the risks of accidental release of toxic chemicals

HAZDIG (HAZardous DIspersion of Gases) is a user-friendly PC- based softwar e for generating scenarios for the emissions and gaseous dispersion of haza rdous chemicals. It can simulate accidental as well as normal release but h as been specifically developed as a tool for studying accidental release of hazardous chemicals and the consequences. HAZDIG is made-up of five main m odules-data, release scenario generation, dispersion, characteristics estim ation, and graphics. HAZDIG incorporates the latest models for estimating a tmospheric; stability and dispersion. The data needed to run the models is easy to obtain and feed-properties of chemicals, operating conditions, ambi ent temperature, and a few commonly available meteorological parameters. A database containing various proportionality constants and complex empirical data has been built into the system. The graphics module enhances the user friendliness of the software, and enables presentation of the results in a n easy-to-understand and visually appealing manner. The output of the softw are is formatted so that it can be directly used for reporting the results without the need of editing. (C) 1999 Elsevier Science Ltd. All rights rese rved.