湘西南地区地貌分类与地形特征研究  

Geomorphological Classification and Topographic Features of the Southwest Region of Hunan Province

作　　者：李晓亮 徐显博 夏长林 毛威 LI Xiaoiang;XU Xianbo;XIA Changin;MAO Wei(Troops No.96833,Huaihua 418000,Hunan)

机构地区：[1]96833部队,湖南怀化418000

出　　处：《火箭军工程大学学报》2024年第1期71-78,共8页Journal of Rocket Force University of Engineering

摘　　要：基于90 m航天飞机雷达地形测绘任务(Shuttle Radar Topography Mission,SRTM)数字高程模型(Digital Elevation Model,DEM),利用ArcGIS 10.8、Excel等统计分析工具,采用均值变点法确定了湘西南地区地貌分析的最佳窗口,提出了具体的地貌分类标准。通过提取高程、地形起伏度、坡度、坡向、地表切割度、地表粗糙度等地形因子,分析了研究区地形特征。结果表明:湘西南地区地貌分析最佳窗口为13×13像素(136.89×10^(4) m^(2)),地形起伏度为0.00~1359.30 m;湘西南地区地形复杂,包含9种地貌类型且交错分布;低海拔丘陵和小起伏山地为主要地貌类型,面积占比达73.10%;地形坡度主要集中在0°~25°,面积占比88.69%,以斜坡为主;坡向中,平缓坡极少,其他各坡向占比大致相当;地表切割度为0.00~995.43 m,地表粗糙度为1.00~4.31;湘西南地区地形起伏度、坡度、地表切割度、地表粗糙度的空间分布基本类似,低值区主要分布在邵阳市中部、永州市北部和中南部区域。Based on the 90-meter shuttle radar topography mission(SRTM)digital elevation model(DEM)and statistical analysis software such as Excel and ArcGIS 10.8,the best window for geomorphological analysis in the southwest region of Hunan province was determined by mean-variation analysis.Accordingly,the specific geomorphological classification standard was pro-posed.Thereby,topographic characteristics of the studied area were analyzed by extracting the el-evation,relief degree,slope,aspect,surface incision and surface roughness.Results showed that the best window for geomorphological analysis in the studied area is 13×13(136.89×10^(4) m^(2))and the relief amplitude is from 0.00 to 1359.30 m.The topography of the area is complex,where nine kinds of landforms interlock.The main landforms are low-elevation hills and small un-dulating mountains,which occupy 73.10%of the total area.The gradient of 88.96%of the re-search area is between 0 and 25 degrees,which means most of the area are inclines.Except the flat slope,the ratio of other aspect is roughly the same.The surface incision is from 0.00 to 995.43 m and the surface roughness is from 1.00 to 4.31.The space distribution of relief degree,slope,surface incision and surface roughness are basically similar in the studied area,while low value regions are mainly distributed in the middle of Shaoyang city,the north of Yongzhou city,as well as the central and the south of Hunan province.

关 键 词：数字高程模型 地形起伏度 均值变点法 地形地貌 湘西南地区 

分 类 号：E234[军事—军事理论]