CTDMPLUS: A dispersion model for sources near complex topography. Part 2. Performance characteristics

Technical Report · Wed Jan 01 04:00:00 EST 1992

OSTI ID:6995757

Paumier, J O; Perry, S G; Burns, D J

The Complex Terrain Dispersion Model (CTDMPLUS), described in Part I of the paper, was evaluated using the SO2 field study data from the Lovett Power plant in southeastern New York State. For additional perspective, CTDMPLUS estimates are also compared with those from the regulatory version of the Rough Terrain Dispersion Model. Comparing the highest 25 hourly observations with the highest 25 model predictions shows a tendency for CTDMPLUS to overpredict, on average, by about a factor of two. Similar results are found for 3-h and 24-h average predictions. Overpredictions occur mainly for stable atmospheric conditions. The meteorological conditions associated with the highest 25 observed concentrations are examined relative to the performance of CTDMPLUS. The analysis suggests that the most significant factors affecting CTDMPLUS predictions for stable conditions are the height of the plume and its relation to the dividing streamline, and in convective conditions the plume penetration, lateral plume spread, and wind direction.

• Research Organization: Computer Sciences Corp., Research Triangle Park, NC (United States)
• OSTI ID: 6995757
• Report Number(s): PB-93-107084/XAB; CNN: EPA-68-01-7365
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
540120* -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (1990-)
AIR POLLUTION
C CODES
CHALCOGENIDES
COMPLEX TERRAIN
COMPUTER CODES
COMPUTERIZED SIMULATION
DEVELOPED COUNTRIES
ENVIRONMENTAL TRANSPORT
MASS TRANSFER
NEW YORK
NORTH AMERICA
OXIDES
OXYGEN COMPOUNDS
PLUMES
POLLUTION
POLLUTION SOURCES
SIMULATION
SULFUR COMPOUNDS
SULFUR DIOXIDE
SULFUR OXIDES
TOPOGRAPHY
USA
WIND