石家庄学院学报

利用全国74个酸雨监测站点2004-2006年降水-pH数据,通过ArcGIS空间插值,模拟酸雨pH空间分布,根据酸雨"两控区"方案,提取酸雨控制区的酸雨pH空间分布,进行GIS空间分析.结果表明:中国的酸雨严重区主要分布在四川盆地、长江以南广大地区,酸雨强度沿长江向西北和东部有扩大趋势,四川盆地酸雨区已与华南酸雨区连成一片;3年间,pH<5.6的酸雨范围相对研究区面积比值由56.73%扩大到73.11%,pH<4.5的严重酸雨区由2.15%扩大到10.41%,2006年增幅最大;不同等级酸雨范围扩大趋势明显,酸雨污染趋于严重.

The pH distribution of acid rain in the acid rain pollution controlled area in China is simulated by using the monitoring data of acid rains from 2004 to 2006 obtained from 74 acid rain monitoring sites with spatial interpolation of ArcGIS.GIS spatial analysis method is used to analyze the distribution of acid rain of the acid rain pollution areas which is extracted from the interpolated map.As the results show,the most serious acid rain polluted areas are located in Sichuan Basin and areas to the south of the Yangtze River;the variations of gradual acid rain region expand from southern China to the northwest and Eastern China along the Yangtze River;the ratio of acid rain range of pH less than 5.6 to the acid rain pollution controlled area expands from 56.73% to 73.11% in the 3-year period;the ratio of the most serious polluted area of pH less than 4.5 expands from 2.15% to 10.41%,which grew the fastest in 2006;the expanding trends of acid rain ranges of different grades are very significant;and the acid rain pollution has become more serious.