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VALLEY: Multiple Point and Area-Source Gaussian Plume Dispersion Model

VALLEY is an air pollution model specifically designed for the complex terrain conditions normally encountered in mountainous areas. It can consider multiple point or area sources and works over a 24 hours o a year period. It requires a stable, unstable or neutral atmosphere to suitably correct the plume height taking into account the terrain elevation.


area: air quality
objectives: simulation
description: gaussian plume, complex terrain, valleys, point sources, area sources, rural environment, short term, long term, short range, non reactive pollutant


You can download the software from
EPA - SCRAM Models

or directly: http://www.epa.gov/scram001/models/screen/valley.zip (IBM 3090 Mainframe Version, 23KB, ZIP)

The model is part of UNAMAP and is available on diskette from:
Computer Products
National Technical Information Service
U. S. Department of Commerce
Springfield, Virginia 22161
Phone (703) 487-4650


Edward W. Burt
U.S. Environmental Protection Agency
Office of Air and Waste Management
Office of Air Quality Planning and Standards
Research Triangle Park, NC 27711


  • Burt, E. (1977): VALLEY Model User's Guide. PB -274 054 EPA 450/2-77-018 U.S.EPA, Reseach Triangle Park, NC, USA.


  • Burt, E., Slater, H. (1977):" Evaluation of the VALLEY model", AMS/APCA Conf. on Applications of Air Pollution Meteorology, Salt Lake City, Utah, USA.
  • Hanna, S., Egan, B., Vaudo, C., Curreri, A. (1984): "A complex terrain dispersion model for regulatory applications at the Westvaco Luke Mill", Atmospheric Environment 18: 685-699.



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