Comparison of Observed Average Concentrations of exp 85 Kr with Calculated Values Obtained from a Wind Rose Model and a Time-Dependent Wind Trajectory Model

摘要

The assessment of long-term environmental effects of industrial pollution is frequently obtained with a so-called stability wind rose model in combination with the Gaussian plume equation. Calculated values obtained with these models should be correct to within a factor of 2 or 3 when meteorological conditions at the point of release are identical with those conditions at the valid point of the calculation, normally, within 1 km. As the distance between these two points increases, the validity of the wind rose model degrades. As increased emphasis is placed on regional transport of air pollution, the wind rose model is being applied (without verification) over distances in excess of 50 km. This report presents some preliminary tests of the wind rose model with one-week-averaged concentrations of exp 85 Kr observed at 13 sites. These sites were 30 to 140 km from a point source at the Savannah River Plant (SRP). A test was also made of a time-dependent curved trajectory model with one-week averaged concentrations. (ERA citation 03:019687)