摘要
由于特殊的地理和气象条件及能源结构等因素,四川、重庆成为我国主要酸性降水区域。通过收集川渝两地1996-2000年的降水pH年均值和酸雨频率监测资料,利用GIS空间分析的功能,绘制出各主要城市和各区县降水pH值的等值线图和酸雨频率空间分布图,说明川渝两地近年来酸雨的空间分布特征。川渝两地酸雨主要分布在四川盆地,在盆地周边山地形成类似于环状的污染带,而盆地中心受到的酸雨污染较轻。同时,四川盆地内、外的酸性降水有十分明显的差异。
Acid rain has been one of the environmental problems in China. Because of the specific geographical and meteorological conditions and energy consumption structures,Siehuan province and Chongqing municipality have become the major acid precipitation regions. In this paper the contour plots of precipitation pH value and the spatial distributions of acid rain frequency have been mapped out with the precipitation routine monitoring data in the period of 1996-2005 by the GIS spatial analysis function, which reflects the spatial characteristics of acid rain in the last decade. It is shown that tb.e acid rains are mainly distributed in the Sichuan Basin, and there seems a cycling pollution belt over the mountain area around the basin, and less acid rain pollution in the center of the basin. Meanwhile, the acidity of precipitation shows a very significant difference within and outside of the basin.
出处
《三峡环境与生态》
2008年第2期1-3,36,共4页
Environment and Ecology in the Three Gorges
关键词
降水
酸雨频率
空间分布
precipitation
acid rain frequency
spatial distribution
