重庆市喀斯特槽谷地区农村居民点分布与地貌形态要素关系研究

选取喀斯特槽谷地区——重庆市石柱土家族自治县鱼池镇团结村农村居民点为研究对象,借助ArcGIS空间分析和地统计法,综合应用地貌-面积频度分布指数和信息熵分析了不同海拔、坡度、坡向、地形起伏度、地表粗糙度、剖面曲率和平面曲率7个地貌形态要素间农村居民点的分布特征。结果表明:①农村居民点分布的优势地形位分别为高程956.2~1000m,坡度5°~15°,坡向SW、W、NW和E,地形起伏度0~1m,地表粗糙度1.0~1.1,剖面曲率和平面曲率0°~5°的低地形位上;②在槽谷谷底,农村居民点信息熵的最大值为1.15,最小值为0.02,说明农村居民点在低地形位上分布的有序性较高。 

Research on the distribution of rural settlements in relation to landform factors in karst trough valley of Chongqing Municipality

Taking rural settlements of Tuanjie Village,Yunchi Town,Shizhu Tujia Autonomous County as the study case,distribution characteristics of rural settlements are analyzed in view of landform factors such as elevation,slope,aspect,terrain undulation,surface roughness,SOA(slope of aspect) and SOS(slope of slope).The study adopts the method of spatial analysis and geostatistics of GIS and applies frequency distribution index of landform–area and information entropy.The major results indicate the advantageous terrain habitats of rural settlements locate in areas with elevation 956.2~1 000 m,slope 5~15 degree,aspect SW,W,NW and E,terrain undulation 0~1 m,surface roughness 1.0~1.1,SOA and SOS 0~5 degree.The maximum of information entropy of rural settlements in the bottom of karst trough valley is 1.15,but the minimum is 0.02,which indicates that the orderliness of rural settlements distribution in the low terrain is higher.