An Evaluation Method of Amount Deposited on the Ground Surface in Atmospheric Diffusion

[摘要] Chamberlain's method proposed in 1953 to estimate the amount of deposition is examined for practical use, using the method of calculating the dosage of air pollutant developed by Meade.According to Chamberlain's method, the vertical profile of diffusing material does not change by deposition, so a new method is developed so as to modify his method. The results are summarised as follows:(1) The difference between the two methods becomes larger at far down-wind distance from a source in usual deposition velocity (>1.0cm/sec).(2) The vertical profile remains the same in Chamberlain's method but the method presented here shows the profile modified by deposition.(3) The difference is small at short distance, which, however, is not to be ignor ed in dosage analysis.

[学科分类] 大气科学