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Record Search Query: ServiceParameters>MODELS>ATMOSPHERIC CHEMISTRY MODELS

HGSYSTEM: Dispersion Models for Ideal Gases

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Abstract: As a result of many years in-house research, the gas dispersion group at Shell Research Ltd. Thornton (United Kingdom) has developed a package of mathematical models, called HGSYSTEM, to study the atmospheric dispersion of accidental pollutant releases with emphasis on denser-than-air materials. HGSYSTEM can simulate different dispersion scenarios (jet dispersion, heavy gas dispersion, passive ... View entire text
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Description: FLDWAV is a generalized flood routing model (written in FORTRAN) which performs unsteady flow simulation. It replaces the National Weather Service DAMBRK and DWOPER models because it combines their capabilities and provides additional hydraulic simulation features.
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Service Citation
Originators: US EPA
Title: HGSYSTEM: Dispersion Models for Ideal Gases
Release_Date: 1995-12
Provider: National Technical Information Service
Edition: 3.0
Service Keywords

Use Constraints The datafile is on four 3 1/2 inch DOS diskettes, 1.44M high density.
Documentation included; may be ordered separately as PB96-184023 and

DOS operating system. Language: FORTRAN. 80386 processor or greater, MS-DOS
3.3, 4 MB RAM, 2.5 MB free disk space, and a math coprocessor recommended.
Copyright Shell Internationale Research Maatschappij B.V. 1994.
Service Provider
DOC/NTIS > National Technical Information Service, U.S. Department of Commerce Supplemental Info
Service Organization URL:

Service Provider Personnel
Name: NTIS
Phone: 703-487-4650
Phone: TELEX: 64617
Fax: 703-321-8547
Fax: 703-321-9038
Email: info at
Contact Address:
National Technical Information Service (NTIS)
U.S. Department of Commerce
5285 Port Royal Road
City: Springfield
Province or State: VA
Postal Code: 22161
Country: USA
Distribution Media
Distribution_Media: 4 Diskette
Fees: $201.00 US Dollars

Distribution_Media: CD-ROM
Fees: $201.00 US Dollars
Phone: (703) 605-6585
Email: helpdesk at
Contact Address:
National Technical Information Service
5285 Port Royal Road
City: Springfield
Province or State: VA
Postal Code: 22161
Country: USA
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Creation and Review Dates
SERF Creation Date: 2006-03-16
SERF Last Revision Date: 2011-02-24
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