User's guide for OML-MULTI. An air pollution model for multiple point and area sources

摘要

OML-Multi ia a numerical model for air pollution dispersion calculations on mainframe computers. It can be used for estimating concentration contributions from several point and area sources. In OML-Multi dispersion processes are described in terms of certain physical parameters, shown by recent research to be of basic importance to boundary layer meteorology. These parameters are derived from routine meteorological data by means of a separate meteorological preprocessor. The present report outlines the features and limitations of the dispersion model. Further, a brief description of the physics underlying the model is given. Finally, the report provides technical information concerning the computer implementation of the model. As input, the model requires time series of hourly meteorological data plus information on emission and terrain. The model performs dispersion calculations hour by hour. There are several options that control the input of files, computational facilities, and output. One of the user options controls output of tables of monthly 99-percentiles. This report describes the version of OML-Multi dated 910205. (au) (16 refs.)