花岗岩地区水蚀荒漠化问题探讨——以澄源河流域为例

以安徽省绩溪县澄源河流域为例，说明我国南方受干旱影响的亚湿润地带花岗岩地区水蚀荒漠化的存在，并探讨了其成因及危害。该流域１９８４年水蚀荒漠化面积为７．５６ｋｍ２，占流域总面积的１８．０３％；经过１０ａ的治理取得了一些成就和经验，至１９９６年水蚀荒漠化的面积已减少到２．５６ｋｍ２，占流域总面积的６．１１％，获得了可观的经济、社会和环境效益。事实说明只要采取一系列预防和治理措施，荒漠化过程是可以逆转的。

Discussion on Water induced Desertification in Granite Area of Southern China-Taking Chengyuan River Basin in Jixi County of Anhui province as an Example.

The Chengyuan River Basin in Jixi county of Anhui province was taken as a site for case study of desertification combating. The results showed the existence of water induced desertification in granite area of sub humid zone of Southern China. The causes and harmfulnesses of desertification have been discussed. After more than 10 years of efforts on desertification control in the case study area, obvious improvement had been made and important experiences had been gained. In 1984, the total area of water induced desertification in Chengyuan River Basin was 7.56 km 2 which accounts for 18.03% of the total area of the basin, while in 1996, the acreage and the percentage of water induced desertificaton in the basin were decreased to 2.56 km 2 and 6.11%, respectively. Significant economic, social and environmental benefits have been obtained. Results of the study indicated that the desertification process may be reversed if a series of prevention and control measures could be taken.