【摘要】 土地利用变化是人类活动影响地表变化的重要表征,喀斯特石漠化是生态环境恶化的指示,对生态脆弱的喀斯特地区进行石漠化和土地利用变化的时空分布研究,是地球变化研究的重要议题。通过"3S"技术对典型喀斯特地区关岭县2010～2015年石漠化演变过程和土地利用变化分析,研究发现:(1)无石漠化面积增加了80. 68 km~2,强度、极强度石漠化面积分别减少50. 5和78. 61 km~2,石漠化治理工程初见成效,但石漠化演化是一个双向反复的转化过程;(2)水田、旱地、草地和未利用地面积分别减少54. 4、59. 05、15. 39和302. 82 km~2,有林地、灌木林地和建设用地面积分别增加270. 82、145. 38、13. 37km~2,农户生计资本转变致使耕地撂荒,生态修复工程成效显著;(3)土地利用的变化是石漠化演变方向的指示剂,植被的正向演替区域与石漠化减轻区域吻合,耕地和聚落分布区域与石漠化恶化区域吻合。更多还原

【Abstract】 Land use change is an important indicator of the impact of human activities on surface changes. Karst rocky desertification is an indicator of the deterioration of ecological environment. The study of the spatial and temporal distribution of rocky desertification and land use change in ecologically fragile Karst areas is an important issue in the study of earth change. Through the "3 S"technology analysis of the evolution process and land use change of the rocky desertification in Guanling County in the typical Karst area from 2010 to 2015,it is as follows.(1) the area without rocky desertification increased by 80. 68 km~2,the area of rocky desertification with intensity and intensity. Reducing 50. 5 and 78. 61 km~2 respectively,the rocky desertification control project has achieved initial results,but the rock desertification evolution is a two-way repeated transformation process.(2) The area of paddy fields,dry land,grassland and unused land decreased by 54. 4,59. 05,15. 39 and 302. 82 km~2,respectively,and the area of forest land,shrub land and construction land increased by 270. 82,145. 38 and 13. 37 km~2 respectively,resulting in the conversion of farmers’ livelihood capital. The cultivated land has been abandoned,and the ecological restoration project has achieved remarkable results.(3) Land use change is an indicator of the evolution direction of rocky desertification. The positive succession area of vegetation coincides with the rocky desertification reduction area,and the cultivated land and settlement area coincides with the deterioration of rocky desertification.更多还原