城市街道峡谷内机动车排放污染物的扩散规律

被引:7
作者
张化天
谢绍东
张远航
机构
[1] 中国环境科学研究院大气所
[2] 北京大学环境科学中心环境模拟与污染控制国家重点联合实验室
[3] 北京大学环境科学中心环境模拟与污染控制国家重点联合实验室 北京
[4] 北京
关键词
机动车排气污染; 街道峡谷; 扩散; 建筑规划;
D O I
10.13198/j.res.2002.01.53.zhanght.015
中图分类号
X51 [大气污染及其防治];
学科分类号
0706 ; 070602 ;
摘要
街道峡谷中机动车排放污染物的扩散取决于屋顶风向和风速 ,并受街道峡谷宽高比、峡谷两侧街区建筑物高度的对称性和高度分布及街区形状等因素的影响。街道峡谷宽高比接近 1时 ,递升型峡谷以及宽阔街道有利于污染物的扩散 ;可以通过改变街道线源附近街区内建筑物的高度来明显降低污染物浓度。城市建筑规划中若科学考虑上述影响可以减少街道峡谷内污染物的积聚
引用
收藏
页码:51 / 54
页数:4
相关论文
共 17 条
[1]  
Dispersion of vehicular emission in street canyons,Guangzhou city, South China. Qin Y,Kot S C. Atmospheric Environment . 1993
[2]  
An investigation of investigation of three dimensional characteristics regimes within the urban canyon. Hunter L J,Johnson G T,Watson I D. Atmospheric Environment . 1992
[3]  
Parameterization of the pollutant transport and dispersion in urban street canyons. Lee I Y,Park H M. Atmospheric Environment . 1994
[4]  
Measurement of wind velocity in a street canyon. Depaul F T,Sheih C M. Atmospheric Environment .
[5]  
Street canyon dispersion: sensitivity to block shape and entertainment. Dabberdt W F,Hoydysh W G. Atmospheric Environment . 1990
[6]  
Kinematics and dispersion characteristics of flows in asymmetric street canyons. Hoydysh W G,Dabberdt W F. Atmospheric Environment . 1988
[7]  
Validation and applications of an urban diffusion model for vehicular pollutants. Ludwig F L,Dabberdt W F,Johnson W B. Atmospheric Environment . 1973
[8]  
A note on average verticle profiles of vehicular pollution concentrations in urban street canyons. Zoumarkis N M. Atmospheric Environment . 1995
[9]  
A wind tunnel study to determine the air pollution dispersion characteristics in an urban center. Jacko R B,Palmer G M,Brenchley D L. Miami, Florida, U S A: Presented at the 65th annual meeting of APCA, Miami Beach, FL . 1972
[10]  
An urban diffusion simulation model for carbon monoxide. Johnson W B,Ludwig F L,Dabberdt W F,et al. Journal of the Air Pollution Control Association . 1973