贵州不同地貌类型区石漠化特征对比研究

Comparative Study on Rocky Desertification in the Different Geomorphic Type of Guizhou

石漠化已经成为中国南方岩溶地区严重的生态问题,石漠化的发育因自然背景脆弱程度不同具有很大差异性。以贵州典型地貌类型区为例,综合运用3S技术,研究石漠化特征和变化规律差异性。结果表明:石漠化发生率及程度与地貌形态存在较大的相关性,岩溶峡谷区石漠化发生率最高,石漠化最严重。经工程治理后三个地貌类型区石漠化面积都有减少,但岩溶高原盆地区石漠化年变化率较大,石漠化治理效果最好,而岩溶高原峡谷区石漠化年变化率最低,治理难度最大。

Rocky desertification has become a serious ecological problem in South China karst area, rocky desertifieation development has a great difference due to different natural background. With typical geomorphic area in guizhou as an example, using 3S technology, research the characteristics and variation of rocky desertification in dif- ferent geomorphic area. The results show that： there is a significant correlation between the incidence and degree of rocky desertifieation with landform, occurrence rate of rocky desertifieation in karst valley area is highest, and deserti- fieation is most serious. Rocky desertification area in three landforms are reduced after the project management, but the desertification annual change rate in karst plateau basin is highest, and the Karst gorge is the lowest, suggested that plateau basin area desertification control effect is better than gorge area.