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Title: User's manual for DWNWND: an interactive Gaussian plume atmospheric transport model with eight dispersion parameter options

Abstract

The most commonly used approach for estimating the atmospheric concentration and deposition of material downwind from its point of release is the Gaussian plume atmospheric dispersion model. Two of the critical parameters in this model are sigma/sub y/ and sigma/sub z/, the horizontal and vertical dispersion parameters, respectively. A number of different sets of values for sigma/sub y/ and sigma/sub z/ have been determined empirically for different release heights and meteorological and terrain conditions. The computer code DWNWND, described in this report, is an interactive implementation of the Gaussian plume model. This code allows the user to specify any one of eight different sets of the empirically determined dispersion paramters. Using the selected dispersion paramters, ground-level normalized exposure estimates are made at any specified downwind distance. Computed values may be corrected for plume depletion due to deposition and for plume settling due to gravitational fall. With this interactive code, the user chooses values for ten parameters which define the source, the dispersion and deposition process, and the sampling point. DWNWND is written in FORTRAN for execution on a PDP-10 computer, requiring less than one second of central processor unit time for each simulation.

Authors:
;
Publication Date:
Research Org.:
Oak Ridge National Lab., TN (USA)
OSTI Identifier:
5415772
Report Number(s):
ORNL/TM-6874
TRN: 80-008767
DOE Contract Number:  
W-7405-ENG-26
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; 99 GENERAL AND MISCELLANEOUS//MATHEMATICS, COMPUTING, AND INFORMATION SCIENCE; COMPUTER CODES; D CODES; EARTH ATMOSPHERE; RADIONUCLIDE MIGRATION; ENVIRONMENTAL TRANSPORT; MATHEMATICAL MODELS; RADIOACTIVE AEROSOLS; COMPUTERIZED SIMULATION; DOSIMETRY; PLUMES; AEROSOLS; COLLOIDS; DISPERSIONS; MASS TRANSFER; SIMULATION; SOLS; 500300* - Environment, Atmospheric- Radioactive Materials Monitoring & Transport- (-1989); 990200 - Mathematics & Computers

Citation Formats

Fields, D.E., and Miller, C.W. User's manual for DWNWND: an interactive Gaussian plume atmospheric transport model with eight dispersion parameter options. United States: N. p., 1980. Web. doi:10.2172/5415772.
Fields, D.E., & Miller, C.W. User's manual for DWNWND: an interactive Gaussian plume atmospheric transport model with eight dispersion parameter options. United States. doi:10.2172/5415772.
Fields, D.E., and Miller, C.W. Thu . "User's manual for DWNWND: an interactive Gaussian plume atmospheric transport model with eight dispersion parameter options". United States. doi:10.2172/5415772. https://www.osti.gov/servlets/purl/5415772.
@article{osti_5415772,
title = {User's manual for DWNWND: an interactive Gaussian plume atmospheric transport model with eight dispersion parameter options},
author = {Fields, D.E. and Miller, C.W.},
abstractNote = {The most commonly used approach for estimating the atmospheric concentration and deposition of material downwind from its point of release is the Gaussian plume atmospheric dispersion model. Two of the critical parameters in this model are sigma/sub y/ and sigma/sub z/, the horizontal and vertical dispersion parameters, respectively. A number of different sets of values for sigma/sub y/ and sigma/sub z/ have been determined empirically for different release heights and meteorological and terrain conditions. The computer code DWNWND, described in this report, is an interactive implementation of the Gaussian plume model. This code allows the user to specify any one of eight different sets of the empirically determined dispersion paramters. Using the selected dispersion paramters, ground-level normalized exposure estimates are made at any specified downwind distance. Computed values may be corrected for plume depletion due to deposition and for plume settling due to gravitational fall. With this interactive code, the user chooses values for ten parameters which define the source, the dispersion and deposition process, and the sampling point. DWNWND is written in FORTRAN for execution on a PDP-10 computer, requiring less than one second of central processor unit time for each simulation.},
doi = {10.2172/5415772},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1980},
month = {5}
}