浙江省大气环境承载力时空分布特征研究

Analysis of spatial and temporal futures of atmospheric environmental carrying capacity of Zhejiang Province

为了全面把握浙江省的大气环境承载力,选取了SO2、NO2和PM10作为大气环境发展空间的判定指标,以污染物浓度占标率不超过《环境空气质量标准》(GB 3095—1996)规定的二级标准年均值75%作为大气污染物允许浓度限值,采用大气环境承载力相对剩余率和大气环境承载指数的方法研究了浙江省2009—2011年大气环境容量和大气环境承载力的时空分布特征及其影响因素。结果表明,全省11个设区市的SO2除绍兴以外均有一定环境容量,NO2均有一定环境容量,PM10只有舟山、丽水和衢州尚有一定环境容量;11个设区市大气环境承载力分别呈中承载和低承载;3年中全省3项污染物环境容量和大气环境承载指数均有所下降。

SO2, NO2, PM10 were selected as development variables to investigate the atmospheric environmental carrying capacity of Zhejiang Province. Pollutant concentration less than 75 % of annual average concentration of sec- ondary standard of air quality standard （GB 3095-1996） was used as restricted variables to calculate the atmospheric environmental carrying capacity index. The spatial and temporal futures and impact factors of Zhejiang atmospheric environmental carrying capacity from 2009 to 2011 were analyzed by the means of relative remain rate and index of at-mospheric environmental carrying capacity. The results showed that besides Shaoxing, other 10 prefecture-level cities of Zhejiang Province have SOz environmental capacity; all 11 prefecture-level cities have NO2 environmental capacity; only Zhoushan, Lishui and Quzhou have PM10 environmental capacity. The atmospheric environmental carrying ca-pacity of the 11 prefecture-level cities is in middle and low stage. During 2009-2011, the atmospheric environmental capacity of the three main atmospheric pollutants and the atmospheric environmental capacity index of the whole prov-ince are both declined.