中国西南地区石漠化敏感性评价及其空间分析

石漠化是我国西南地区最为严重的生态环境问题之一，识别发生石漠化敏感区域，为岩溶地区石漠化防治提供科学依据显得十分必要。总体分析了目前中国石漠化和有关生态环境研究的资料，将石漠化敏感性影响因子归结为岩性、降水、坡度和植被等4项，并确定了各因素对石漠化敏感性影响等级，综合评价了我国西南五省(市)(包括黔、滇、贵、川、渝)石漠化敏感性及其空间分布格局。结果表明，敏感性评价结果基本反映石漠化现状，石漠化敏感区集中分布在贵州西部、南部，广西西部、东部以及云南东部等地。四川、重庆等地石漠化危害相对较小。

Sensitivity of rocky desertification and its spatial distribution in southwestern China

Rocky desertification is one of the most serious eco-environmental problems.It is necessary to identify the most sensitive region and to offer scientific foundation to tackle rocky desertification.Based on the studies on rocky desertification and correlative eco-environmental problems,four leading factors,namely,lithology,precipitation,slope and vegetation were identified to be accountable for rocky desertification,with their influence on sensitivity classified.The integrated assessment of rocky desertification sensitivity in Southwestern China was proposed which could reflect the fact on the whole.The central,south and west of Guizhou,west and east of Guangxi,and east of Yunnan are the most sensitive areas to rocky desertification,while it is relatively less harmful in Sichuan and Chongqing.