CTEH^® performs atmospheric dispersion modeling (ADM) for emergency and planning situations. ADM is used to estimate temporally- and spatially-resolved atmospheric concentrations of a chemical by using release, meteorological, and topographical information. Release rate estimates are developed by CTEH chemical engineers using state-of-the-science algorithms and estimation tools. Meteorological information is obtained through multiple methods, and topographical information is included where appropriate. This important estimation process helps the toxicology component of CTEH^® to assign areas of risk to a particular event.

Models Used

CTEH^® uses SAFER STAR^TM (SAFER) to help manage an emergency and to provide early warning to those who may risk exposure to a potentially harmful substance. SAFER accurately models the effects of chemical accidents (toxic releases, fires and explosions). The program includes state-of-the-science algorithms for addressing atmospheric dispersion, thermal radiation and blast overpressure modeling. In addition, SAFER provides mapping and topographical databases for the region of interest. Once the release site is identified, SAFER rapidly assembles appropriate maps and topographical data. Meteorology may be obtained from a mobile weather station or by interfacing to remote weather information (obtained from Internet sites or dedicated weather service providers).

Sophisticated Modeling Algorithms: SAFER includes several powerful scientific calculations of Release Rates, Source Dynamics, Vapor Cloud Dispersion, Structural Infiltration, Fires, Explosions, Back Calculation and Special Algorithms for unique situations. These complex equations quickly and accurately calculate the impact of potential fires, imminent explosions, and toxic releases on the surrounding community.

Learn more about SAFER STAR^TM here.