基于不同分辨率DEM的黄土高原地形起伏度研究  

Study on Relief Amplitude of the Loess Plateau Based on DEM with Different Resolutions

作　　者：刘元 韩磊[2,3] LIU Yuan;HAN Lei(Shaanxi Provincial Natural Resources Information Center,Xi'an Shaanxi 710054;School of Land Engineering,Chang'an University,Xi'an Shaanxi 710054;Shaanxi Key Laboratory of Land Consolidation,Xi'an Shaanxi 710054)

机构地区：[1]陕西省自然资源信息中心,陕西西安710054 [2]长安大学土地工程学院,陕西西安710054 [3]陕西省土地整治重点实验室,陕西西安710054

出　　处：《河南科技》2021年第27期89-94,共6页Henan Science and Technology

基　　金：陕西省重点研发计划(2021SF-440)。

摘　　要：基于12.5 m、30 m、90 m三种不同分辨率DEM数据,以黄土高原区域的榆林市为例,利用ArcGIS和均值变点法确定地形起伏度分析的最佳分辨率与最佳分析窗口大小,并对榆林市地形分级。结果表明榆林市地形起伏度分析的最佳分辨率为12.5 m,最佳分析窗口大小为18×18,对应的窗口面积为5.0625 km^(2)。地势起伏平坦区位于榆林市西北部,中部为台地,所占面积最大,约为研究区面积的46.869%,南部为丘陵沟壑区,起伏较大。研究成果为黄土高原水土保持和生态治理提供了科学参考。Based on DEM data with three different resolutions of 12.5 m,30 m,and 90 m,and taking Yulin City in the Loess Plateau as an example,this paper uses ArcGIS and mean change point method to determine the optimal resolution and optimal analysis window size of relief amplitude analysis,so as to classify the terrain of Yulin city.The results show that the optimal resolution of relief amplitude analysis in Yulin City is 12.5 m,and the optimal analysis window size is 18×18,and the corresponding window area is 5.0625 km^(2).The undulating flat area is located in the northwest of Yulin City.The middle part is the platform,which occupies the largest area,about 46.869%of the study area.The south part is a hilly and gully area with large undulations.The research results can provide a scientific reference for soil and water conservation and ecological management in the Loess Plateau.

关 键 词：地势起伏度 不同分辨率 均值变点法 黄土高原 

分 类 号：P217[天文地球—测绘科学与技术]