我国是喀斯特发育的国家。全国碳酸岩系分布总面积在200万平方公里以上,碳酸岩出露的面积约占总面积的13%;其中尤以广西、云南、贵州等区最大,碳酸岩面积均占3省区总面积的50%以上。

The region concerned in this paper, covers the parts of the basins of Zhujiang and Yuanjiang, it is limited to the area between 102?-110癊 and 23癊-25癊.22 catchments of which each area is less than 3,000 km² were selected for analysing and 2 non-karstic catch-ments for comparison (Fig. 1).