摘要：In this study, the maximum downwind distancexmax was calculated according to the dispersion parametersand by using four methods the power law function,standard, Klug and Pasquill-Gifford method sat threeeffective heights of 5, 100 and 250 m, respectively. Themaximum ground level concentration of air pollution thatbased on the Gaussian model can be calculated by usingthe estimated and actual values of the xmax for differentstability classes. The estimated and actual xmax aresummarized as 0-492 m in power law and standardmethod, also the percentage of the error betweenestimated and actual maximum downwind distance in therange of 0.005-14.2, respectively. Comparison betweenthe results of estimated and actual xmax in case of powerlaw and standard method with the previous work usedBrigg method (Ronbanchob2015) is carried out.
