渭北旱塬小流域土地利用空间分布与地形因子的关系——以陕西省淳化县秦庄沟流域为例  

Relationship Between Terrain Factors and Spatial Distribution of Small Watershed Land Use in Dry Upland to North of Weihe River——A Case Study of Qinzhuanggou Watershed of Chunhua County,Shaanxi Province

作　　者：陈见影[1] 孙虎[1] 常占怀 

机构地区：[1]陕西师范大学旅游与环境学院,陕西西安710062 [2]陕西省水土保持勘测规划研究所,陕西西安710199

出　　处：《水土保持通报》2014年第2期163-167,共5页Bulletin of Soil and Water Conservation

基　　金：香港郭氏集团扶贫基金会"陕西淳化县秦庄沟流域水土保持与社会经济发展规划"(SXW20111);香港郭氏基金会"脱贫困奔小康淳化项目"

摘　　要：以渭北旱塬秦庄沟流域为例,以土地利用现状为基础数据,结合ArcGIS技术,对地形因子数据和土地利用数据进行了叠加并提取,采用地形分布指数（LDI）分析了土地利用空间分布与地形因子的关系。研究结果表明,不同地类空间分布与地形因子坡度、高程、沟壑密度存在密切关系,并呈现一定的规律性。耕地优势分布主要在海拔900-1 100m,坡度为5°-25°,沟壑密度为0-4km/km2的区域;在海拔800-1 200m,坡度为0°-15°,沟壑密度为0-2km/km2和4-6km/km2的区域是园地优势分布区;林地优势区主要在海拔1 100-1 250m,坡度为15°-25°和〉25°,沟壑密度为2-6km/km2的区域;裸地的优势区在海拔800-1 000m和1 100-1 200m,坡度为〉25°,沟壑密度为4-8km/km2的区域;居民点用地优势区在海拔900-1 000m,坡度为0°-5°,沟壑密度为0-2km/km2的区域。Taking Qinzhuanggou Watershed in the dry upland to the north of the Weihe River for an example, terrain factor data and land use data were overlaid and extracted based on the map of the terrain,with the support of ArcGIS software.The relationship between land use distribution and terrain factors was studied by land distribution index.Results showed that there is a close relationship between spatial distribution of land types and the terrain data of elevation,gradient and gully density.The predominant area of farmland are 900-1 100mabove sea level,5°-25°slope and 0-4km/km2 gully density;the predominant area of garden plot,800-1 200mabove sea level,0°-15°slope and 0-2and 4-6km/km2 gully density;the predominant area of woodland,1 100-1 250mabove sea level,15°-25°and25°slope and 2-6km/km2 gully density; the advantages of bare land,800-1 000and 1 100-1 200mabove sea level,25°slope and 4-8km/km2 gully density;and the predominant area of rural residential land use,900-1 000mabove sea level,0°-5° slope and 0-2km/km2 gully density.

关 键 词：渭北旱塬小流域 地形因子 土地利用 分布指数 

分 类 号：F301[经济管理—产业经济]