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ALOHA: Areal Location Of Hazardous Atmospheres

ALOHA (Areal Locations of Hazardous Atmospheres) is a program for the evaluation of gas transport and dispersion in atmosphere in emergency conditions. It takes into account both the toxicological and physical properties of the pollutant and the characteristics of the site under study, such as the the atmospheric conditions and the release conditions. The package includes a library with the main properties of about 700 substances and displays graphically the most significant results of the simulations.
ALOHA uses two different models, depending on the type of pollutant: a gaussian plume model for light gases and a heavy gas model due to Spicer and Havens (1989). It assumes a flat terrain, no chemical reaction, no fire, stationary emission conditions (a time varying source is modelled as a sequence of constant releases). The main feature of the model is the computational speed.

KEYWORDS

area: air quality
objectives: emergency management, remediation planning
description: accidental release, toxicological impact, fast response, light gases, heavy gases, short term, short range, inactive pollutant, gaussian plume

SOFTWARE AVAILABILITY

ALOHA is distributed by the
National Safety Council (NSC)
1019 19th Street, N.W., Suite 401
Washington, D.C. 20036-5105
202-293.2270/FAX 202-293.0032
http://www.nsc.org/ehc/cameo.htm

AUTHORS

National Safety Council (NSC)
1019 19th Street, N.W., Suite 401
Washington, D.C. 20036-5105
202-293.2270/FAX 202-293.0032

REFERENCES

  • Brutsaert, Wilfrid, 1982. Evaporation into the Atmosphere: Theory, History and Applications. Boston: D. Reidel Publishing Company. 299 pp.
  • Daubert, T.E. and R.P. Danner, 1989. Physical and Thermodinamic Properties of Pure Chemicals: Data Compilation. Bristol, Pennsylvania: Hemisphere Publishing Corporation. Three volumes.
  • Havens, Jerry, University of Arkansas, Fayetteville, NOAA DEGADIS evaluation report, memorandum to Jerry Galt, NOAA, 1990.
  • Havens, Jerry and Tom Spicer, 1990. LNG Vapor Dispersion Prediction with the DEGADIS Dense Gas Dispersion Model. Topical Report (April 1988 - July 1990). Chicago: Gas Research Institute.
  • National Oceanic and Atmospheric Administration, 1992. CAMEO 4.0 for the Apple MAcintosh Computer. Washington, D.C.: National Safety Council. 411 pp.
  • National Intitute of Occupation safety and Health (NIOSH), 1990. Pocket Guide to Chemical Hazards. Washington, D.C.: U.S. Government Printing Office.
  • Spicer, Tom and Jerry Havens, 1989. User's guide for the DEGADIS 2.1 Dense Gas Dispersion Model. Cincinnati: U.S. Environmental Protection Agency. EPA-450/4-89-019.
  • Turner,D. Bruce, 1974. "WORKBOOK OF ATMOSPHERIC DISPERSION ESTIMATES", Springfield, Virginia: National Technical Information Service.
  • Turner, D. Bruce and Lucille W. Bender., 1986. Description of UNAMAP (Version 6). Springfield, Virginia: National Technical Information Service. 13 pp.
  • Wilson, D.J., 1987. Stay indoors or evacuate to avoid exposure to toxic gas? Emergency Preparedness Digest 14(1): 19-24.

 

 

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