ROADWAY: a numerical model for predicting air pollutants near highways. User's guide. Final report

Technical Report · Sun Mar 01 04:00:00 EST 1987

OSTI ID:6413527

Eskridge, R; Catalano, J

ROADWAY is a finite-difference model that solves a conservation of species equation to predict pollutant concentrations within two hundred meters of a highway. It uses surface-layer similarity theory to predict wind and eddy-diffusion profiles from temperature at two heights and wind velocity upwind of the highway. A unique feature of the model is its use of vehicle wake theory which was originally developed by Eskridge and Hunt (1979), and was modified by Eskridge and Thompson (1982); Eskridge and Rao (1983, 1985). It is assumed that vehicle wakes affect the wind and turbulence fields in a linear manner with wake intensity a function of vehicle speed, downwind distance, and distance from the wake center. The user has the option of considering NO, NO/sub 2/, and O/sub 3/ chemical reactions near the road. Output from the model consists of x-z fields of wind components, eddy-diffusion coefficients, and concentration of pollutant.

• Research Organization: Aerocomp, Inc., Costa Mesa, CA (USA)
• OSTI ID: 6413527
• Report Number(s): PB-87-171906/XAB
• Country of Publication: United States
• Language: English

Related Subjects

500200* -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
AIR POLLUTION
ALGORITHMS
ATMOSPHERIC CIRCULATION
CHALCOGENIDES
FORTRAN
MATHEMATICAL LOGIC
MATHEMATICAL MODELS
NITROGEN COMPOUNDS
NITROGEN OXIDES
OXIDES
OXYGEN COMPOUNDS
OZONE
POLLUTANTS
POLLUTION
PROGRAMMING LANGUAGES
ROADS