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Plume blight visibility modeling with a simulated photograph technique

Conference ·
; ;
A description is given of a visibility model and the results of its application to plume blight problems. The model calculates pollutant dispersion, atmospheric chemistry, and radiative transfer in plumes from industrial facilities. The principal model output is in the form of a simulated photograph that depicts a scene that has been modified by light scattering particulates and light absorbing gases. Pollutant dispersion is described by a gaussian model with provision for multiple reflections between the ground and an elevated stable layer. The atmospheric chemistry module is a photochemical oxidant code, which includes a carbon bond model, SO/sub 2/ chemistry, gas to particle conversion and particle growth and formation. Radiative transfer is treated with a multilayer iterative solution technique. The procedure involves collection of a clean picture of the scene that will be altered by an industrial plume. The information on the film is then extracted by a microdensitometer using fiters appropriate to the colors blue, green, and red. The resulting digital data is modified in accordance with the results of the radiative transfer calculations and written onto film. Either slide film or color print film may be used. The model has been applied in a number of cases. Selected examples that illustrate the importance of various visibility related parameters are presented.
Research Organization:
Los Alamos Scientific Lab., NM (USA)
DOE Contract Number:
W-7405-ENG-36
OSTI ID:
5918723
Report Number(s):
LA-UR-79-3250; CONF-791139-2
Country of Publication:
United States
Language:
English

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Related Subjects

500200* -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
AIR POLLUTION
ATMOSPHERIC CHEMISTRY
CHALCOGENIDES
CHEMISTRY
COLOR
DIFFUSION
ENERGY TRANSFER
GAUSSIAN PROCESSES
HEAT TRANSFER
IMAGES
MATHEMATICAL MODELS
MEETINGS
NATURE RESERVES
NITROGEN COMPOUNDS
NITROGEN OXIDES
OPTICAL PROPERTIES
ORGANOLEPTIC PROPERTIES
OXIDES
OXYGEN COMPOUNDS
PARTICLE SIZE
PHOTOGRAPHY
PHYSICAL PROPERTIES
PLUMES
POLLUTION
RESOURCES
SIMULATION
SIZE
SULFUR COMPOUNDS
SULFUR DIOXIDE
SULFUR OXIDES
VISIBILITY