城街道汽车污染扩散规律模拟研究-环境科学.pdf

1999 11 ENVIRONMENTA L SCIENCE Nov. , 1999 * 傅立新　郝吉明　何东全　贺克斌 ( , 100084Email f chen: @ tsingh a ed. . cn) , . , . OSPM, . , , , . . , , , , , . A Study on Automotive Pollution Dispersion Modeling in Urban Streets* F LixinHao Jiming He Dongq anHe Kebin ( . . . . , , 100084, : @ . . ) Dept of Environ Sci and Eng Tsingh a U niversity Beijing China Email f chen tsingh a ed cn Abstract It is very val able for decision-making of a tomotive poll t ion control to simply describe the disper- sion of traffic related air poll tion in rban street s. In this paper, large amo nt of monit oring data w ere sed to analyze t he effect of wind speed and w ind direct ion on poll t ant dispersion inside a st reet canyon. An rban street canyon dispersion model OSPM initially developed in Denmark, was adopted for the modeling st dy .Test- , ed by monit oring dat a the model is fo nd to be capable of sim lating the effects of w ind speed and wind direction , on dispersion in dayt ime showing t hat the basic pattern of flow and t rb lence field in a street canyon is correct- ly reflected in the model. Poll tion concentrat ion is nearly proportional to the reversal of wind speed w ith form of 1/ u . Keywordsstreet canyon, a tomotive poll tion, dispersion modeling, model,w ind speed,w ind direction. [ 1] STREET 1986 , CPBM[ 2] , . , . : , L r = 2H r ( 0. 5L r ) ( 1) . OSPM[ 3] , , H , r , , L r , . , L L ,