摘要
基于30 m分辨率的ASTER GDEM数据,在ArcGIS 10.3环境中,首先通过均值变点法分析了湖南省阳明山地区宏观地貌因子提取的最佳窗口,提取了该地区的海拔、坡度、坡向、平面曲率、坡面曲率、地形起伏度、地表粗糙度、地表切割深度和高程变异系数9个地形因子,然后通过相关系数矩阵分析了地形因子之间的相关系数,确定了反映阳明山地区地貌特征的最佳地形因子组合,最后基于最佳地形因子组合对阳明山地区的地貌类型进行了划分。研究结果表明,提取阳明山地区宏观地貌因子的最佳窗口为0.56 km^(2),描述该地区的最佳地形因子组合为海拔与地形起伏度。其中,该地区的海拔介于58~1613 m之间,大多低于500 m,地形起伏度介于0~674 m,且以中起伏为主。依据地貌区划标准,基于海拔高程,该地区可划分出低海拔和中海拔2个级别;基于地形起伏度,该地区可划分出平原、台地、丘陵、小起伏山地和中起伏山地5个类别。综合海拔和地形起伏度,该区的基本地貌类型可以划分为8个类别,其中以低海拔丘陵和小起伏低山为主,分别占阳明山地区面积的38.90%、47.23%。
Based on 30 m ASTER GDEM data in the ArcGIS 10.3 environment,firstly,the optimal window for extracting macro geomorphic factors in the Yangmingshan area of Hunan province was analyzed using the mean-change point method.Subsequently,nine terrain factors,including elevation,slope,aspect,plane curvature,slope curvature,relief,surface roughness,surface cutting degree and elevation variation coefficient of this area were extracted.Then,the correlation coefficients between these terrain factors were analyzed using a correlation coefficient matrix.The optimal combination of terrain factors reflecting the geomorphic characteristics of the Yangmingshan area was determined.Finally,the geomorphic types of the Yangmingshan area were divided based on the optimal combination of terrain factors.The results indicated that the optimal window for extracting macroscopic geomorphic factors in the Yangmingshan area is 0.56 km^(2),and the optimal combination of terrain factors to describe the area is altitude and relief.Among them,the altitude of the area ranges from 58 to 1613m, mostly below 500 m, and the relief ranges from 0 to 674 m, with the main being medium relief. According to the geomorphic zoning standards and based on altitude, the area can be divided into two levels: Low altitude and medium altitude . Based on the relief, the area can be divided into five categories: Plain, plateau , hill, small relief mountain and medium relief mountain. Combing the elevation and topographic relief, the basic landform types in this area can be divided into 8 categories, mainly low-altitude hills and small relief low mountains, accounting for 38.90% and 47.23% of the Yangmingshan area, respectively.
作者
郭亚平
湛睿
罗量
刘芬良
GUO Yaping;ZHAN Rui;LUO Liang;LIU Fenliang(Urban Geological Survey and Monitoring Institute of Hunan,Yiyang 413000,China;School of Municipal and Geomatics Engineering,Hunan City University,Yiyang 413000,China)
出处
《信阳师范学院学报（自然科学版）》
CAS
2024年第3期384-391,共8页
Journal of Xinyang Normal University(Natural Science Edition)
基金
国家自然科学基金项目(42101005)
湖南省地质院科研项目(HNGSTP202210)
湖南省自然科学基金项目(2021JJ40023)
湖南省教育厅优秀青年项目(20B106)。
关键词
数字高程模型数据(DEM)
地貌特征
阳明山
digital elevation model(DEM)
geomorphological characteristic
Yangming mountain
