基于GIS广西酸雨区域分布及变化特征分析

利用广西13个酸雨监测站2005—2009年监测资料,结合GIS空间分析功能,探索了广西酸雨的空间分布特征和变化规律,旨在为当地酸雨研究、预防预测和综合治理提供客观科学的理论依据。结果表明:广西酸雨主要分布在中北部地区,酸雨带呈西北-东南走向。酸雨强度最大的城市为河池、来宾和贺州,其降水平均pH值<4.8,酸雨出现频率最高的城市为河池,其发生频率>70%;酸雨强度最弱,出现频率最低的城市为北海和钦州,其降水平均pH值>6.0,发生频率<2%。

ANALYSIS OF ACID RAIN REGIONAL DISTRIBUTION AND VARIATION IN GUANGXI BASED ON GIS

Based on the observation data of the 13 monitoring stations in Guangxi from 2005 to 2009 and combined with the methods of spatial analysis of geographic information system(GIS),this paper explored the acid rain spatial distribution and the acid rain variation characteristics in Guangxi,which aimed at providing objective scientific theory for the local acid rain research,prevention,prediction and comprehensive management.The results showed that the distribution of acid rain was mainly concentrated in the central and northern part of Guangxi and spreading to southeast.The acid rain was most severe in Hechi,Laibing,and Hezhou,with average pH less than 4.8.The highest occurrence frequency of acid rain was in Hechi with more than 70%.The intensity of acid rain was the weakest in Beihai and Qinzhou,where the frequencies of acid rain were lowest with average pH more than 6.0 and the frequency of acid rain less than 2%.