喀斯特地区石漠化与地形坡度的关系分析——以贵州省清镇市为例  

Analysis of Relation of Rock Desertification to Landform and Gradient in Karst Region——A Case Study of Qingzhen City of Guizhou Province

作　　者：周忠发[1] 

机构地区：[1]贵州师范大学地理与生物科学学院,贵州贵阳550001

出　　处：《水土保持通报》2006年第5期1-3,共3页Bulletin of Soil and Water Conservation

基　　金：贵州省十一五攻关项目(黔科合ny字[2006]3028号);贵州省水利厅委托项目

摘　　要：喀斯特地区土地的石漠化与地层岩性、河流切割、土壤侵蚀、坡度及人类活动等有关。主要从地形坡度方面来分析喀斯特地区石漠化的成因,并以贵州高原的清镇市为例,结合石漠化的相关数据,采用GIS技术,对地形坡度与喀斯特地区石漠化进行空间相关分析,最终得出喀斯特地区石漠化与地形坡度的相关关系。研究得出,地形坡度陡、人类活动频繁的地区石漠化面积最大,石漠化程度高；地形坡度小,人类活动少的地区石漠化面积最小。因此地形坡度与石漠化的级别和分布有密切关系。Rocky desertification in the karst region is related to stratum and lithology, incising of river, soil erosion, gradient and human activities, etc. Effects of gradient on rocky desertification in the karst region was analyzed by taking Qingzhen City, Guizhou Province as an example. GIS technology was used for the analysis of spatial distribution of deserts and landform gradient based on correlation data of rocky desertification in Qingzhen City. It is found that the largest area and the greatest extent of rocky desertification are observed in the places with the highest gradient and the most intense human activities. The reverse case can be found in the places with smaller gradient and fewer human activities. Therefore, it is thought that the extent and distribution of rocky desertification are related to landform and gradient in the karst region.

关 键 词：GIS 喀斯特 石漠化 地形坡度 

分 类 号：X43[环境科学与工程—灾害防治]