Record Display for the EPA National Library Catalog


Main Title PAL-DS model : the PAL model, including deposition and sedimentation user's guide /
Author Rao, K. Shankar,
Other Authors
Author Title of a Work
Snodgrass, H. F.,
Shreffler, Jack H.,
Publisher Environmental Sciences Research Laboratory, Office of Research and Development, U.S. Environmental Protection Agency, United States Environmental Protection Agency, Center for Environmental Research Information
Year Published 1982
Report Number EPA/600-S8-82-023
OCLC Number 899263471
Subjects Air--Pollution--Computer simulation
Internet Access
Description Access URL
Library Call Number Additional Info Location Last
EJBD  EPA 600-S8-82-023 In Binder Headquarters Library/Washington,DC 08/16/2018
ELBD ARCHIVE EPA 600-S8-82-023 In Binder Received from HQ AWBERC Library/Cincinnati,OH 10/04/2023
Collation 1 page ; 28 cm
"EPA/600-S8-82-023." "November 1982." "Nov. 1982"--Cover
Contents Notes
PAL is an acronym for an air quality model which applies a Gaussian plume diffusion algorithm to point, area, and line sources. The model is available from the U.S. Environmental Protection Agency and can be used for estimating hourly and short-term average concentrations of non-reactive pollutants at multiple receptors from several sources of each type. PAL is intended to assess the impact on air quality, on scales of tens of meters to several kilometers, of portions of urban areas such as shopping centers, large parking areas, and airports. Level terrain is assumed, and pollutant removal processes are ignored. This report is a User's Guide to the PAL-DS model that utilizes Gaussian plume-type diffusion-deposition algorithms based on analytical solutions of a gradient-transfer model. The PAL-DS model can treat deposition of both gaseous and suspended particulate pollutants in the plume since gravitational settling and dry deposition of the particles are explicitly accounted for. The analytical diffusion-deposition expressions listed in this report are easy to apply and, in the limit when pollutant settling and deposition velocities are zero, they reduce to the usual Gaussian plume diffusion algorithms in the PAL model. This report outlines the modifications of the PAL computer program to include deposition. The information is oriented to the model user and the programmer. This report is not a complete User's Guide to the PAL-DS model; it should be used as a supplement to the original User's Guide for PAL.