Particle-in-cell vs straight-line airflow Gaussian calculations of concentration and deposition of airborne emissions out to 70 km for two sites of differing meteorological and topographical character

Technical Report · Fri Oct 08 04:00:00 EDT 1976

DOI:https://doi.org/10.2172/7330296· OSTI ID:7330296

Lange, R; Dickerson, M A; Peterson, K R; Sherman, C A; Sullivan, T J

Two numerical models for the calculation of air concentration and ground deposition of airborne effluent releases are compared. The Particle-in-Cell (PIC) model and the Straight-Line Airflow Gaussian model were used for the simulation. Two sites were selected for comparison: the Hudson River Valley, New York, and the area around the Savannah River Plant, South Carolina. Input for the models was synthesized from meteorological data gathered in previous studies by various investigators. It was found that the PIC model more closely simulated the three-dimensional effects of the meteorology and topography. Overall, the Gaussian model calculated higher concentrations under stable conditions with better agreement between the two methods during neutral to unstable conditions. In addition, because of its consideration of exposure from the returning plume after flow reversal, the PIC model calculated air concentrations over larger areas than did the Gaussian model.

• Research Organization: California Univ., Livermore (USA). Lawrence Livermore Lab.
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 7330296
• Report Number(s): UCRL-52133
• Country of Publication: United States
• Language: English

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54 ENVIRONMENTAL SCIENCES
AEROSOLS
AIR POLLUTION
CHEMICAL EFFLUENTS
COLLOIDS
DEPOSITION
DISPERSIONS
DISTRIBUTION
DOSES
EARTH ATMOSPHERE
ECOSYSTEMS
ENVIRONMENTAL TRANSPORT
FORECASTING
FUNCTIONS
GAUSS FUNCTION
HUDSON RIVER
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MATHEMATICAL MODELS
METEOROLOGY
MID-ATLANTIC REGION
NATIONAL ORGANIZATIONS
NEW YORK
NORTH AMERICA
POLLUTION
RADIATION DOSES
RADIOACTIVE AEROSOLS
RIVERS
SAVANNAH RIVER PLANT
SIMULATION
SOLS
STREAMS
SURFACE WATERS
TERRESTRIAL ECOSYSTEMS
THREE-DIMENSIONAL CALCULATIONS
TOPOGRAPHY
US AEC
US ERDA
US ORGANIZATIONS
USA