Calculation factor in the dispersion calculation for the The discharge (e.g. solid, liquid or gaseous substances, sou... of pollutants into the atmosphere taking account of the horizontal and vertical dispersion of the pollutant cloud as well as the effective The height of an emission source above ground. It is a param... (stack height and thermal amplified region). The long-time dispersion factor is replaced by the Term for the determination of radiation exposure by short-ti... factor in the dispersion calculation if the The discharge (e.g. solid, liquid or gaseous substances, sou... does not last more than an hour.