摘要
在用A值法确定大气环境容量的方法研究中,给出了大气环境容量系数的理论定义、特性及其累积频率曲线的PIII型拟合,同时证明该系数亦可定义为空气自洁指数.以北京为例探讨了各重现期的大气环境容量系数在不同控制区面积、时段所对应的容量及其相应空气质量的关联.按1951-2014的气象数据计算的北京百年一遇的年均A值为4.47,而百日一遇的日均A值仅为0.23.研究结果表明大气环境容量系数的频率分析或可成为大气环境管理中的一个重要工具.
Atmospheric environmental capacity coefficient is defined in this study. In addition, its characteristics as well as the type PIII fitting of the cumulative frequency curve are investigated. It has been proved that the coefficient can be served as air-self-cleaning Index. The relationship in different return periods between the air quality and the environmental capacity coefficient is studied for several special area and periods. According to the meteorological data observed in Beijing from 1951 to 2014, the average annual A-value with hundred years return period was calculated out as 4.27 and the average daily A-value with hundred days return period as 0.23 only. The research results indicate that the frequency analysis of atmospheric environmental capacity coefficient can be an important tool in the atmospheric environment management.
出处
《中国环境科学》
EI
CAS
CSCD
北大核心
2016年第10期2913-2922,共10页
China Environmental Science
基金
国家自然科学基金项目(41405136)
关键词
大气环境容量系数
A值
累积频率曲线
空气自洁指数
atmospheric environmental capacity coefficient
A-value
cumulative frequency curve
air-self-cleaning Index
