南阳市低山丘陵区土地利用状况分析

The analysis of the land use status of low mountain district in Nanyang city

基于SRTM DEM(90m×90m空间分辨率)数据,运用Arc GIS10.1,通过均值变点分析法得到了研究区域地形起伏度的最佳统计单元窗口大小为19×19栅格,面积为2.92 km^2.提取研究区域地形起伏度与海拔高度数据,作为地貌形态划分的依据,找出南阳市低山丘陵区域.结合南阳市土地利用类型数据,将坡度作为影响土地利用类型的主要地形因子,衡量水土保持能力的主要参考指标,结合《南阳市土地利用总体规划》及相应县市的土地利用规划,分析南阳市的土地利用状况,并针对相应的问题提出切实可行的建议.

This article is based on SRTM DEM spatial resolution( 90 m × 90 m) data,using the Arc GIS10. 1,the study area is obtained by the mean change point analysis relief of optimum statistical unit window size grid for 19 lines,covers an area of 2. 92 km^2. In this paper,the topographic relief and altitude data of the study area were extracted and the basis of the classification of geomorphology was found to obtain the low mountain hilly region of Nanyang. Combining the data of land use types of Nanyang,slope as the main terrain factors affecting land use type and reference index of the primary measure of soil and water conservation capacity,further combining with the Nanyang general land use planning and the corresponding county land use planning,this paper analyzes the land use condition of Nanyang and puts forward some practical advice for the corresponding problems.