高原山区城市流场观测研究  

Flow Field Observation on Plateau Mountainous City

作　　者：张朝能[1] 宁平[1] 沈武艳[1] 马彩霞[1] 赵志坚 

机构地区：[1]昆明理工大学环境科学与工程学院 [2]个旧市环境保护局,云南个旧661000

出　　处：《昆明理工大学学报（理工版）》2008年第4期77-80,共4页Journal of Kunming University of Science and Technology(Natural Science Edition)

基　　金：教育部春晖计划项目(项目编号:2003009)

摘　　要：小球测风观测结果表明某高原山区城市建筑物和周围山体导致下垫面粗糙度增大，从而风速高度指数P较平原地区大很多，也大于国家大气环境影响技术导则中推荐的城市风速高度指数，达到0．518以上．根据该市100m烟囱排放的二氧化硫量，在年平均风速、相同稳定度下，采用实测拟合P值预测的最大落地浓度及其出现距离分别比使用导则推荐P值预测的结果减少22．2％-30．2％,9．4％-12．4％．The results of the pilot balloon observation show that the exponent of wind velocity p of 0. 518 is greater than the plain＇s and the value recommended by atmospheric environmental impact assessment technical guidelines because the surface roughness varies with the buildings of the city and the terrain in the plateau mountainous city. The maximum ground concentration and its distance predicted with observational value is reduced by 22.2% - 30.2%, 9.4% - 12.4% respectively than that with the value recommended by the guidelines at the annual average wind velocity on the condition of the same atmospheric stability and the SO2 emission of stack with 100m physical height in the city.

关 键 词：大气扩散 测风仪 大气污染物 

分 类 号：X131.1[环境科学与工程—环境科学]