ArcGIS环境下基于DEM的地形指标和水文信息提取分析  

Topographic Indicators and Hydrological Information Extraction and Analysis Based on DEM

作　　者：周林虎 张秉来 曹荣泰 张建 祁兆鑫 刘宇平 胡荣泽 张雯昕 ZHOU Linhu;ZHANG Binglai;CAO Rongtai;ZHANG Jian;QI Zhaoxin;LIU Yuping;HU Rongze;ZHANG Wenxin(PowerChina Qinghai Electric Power Design Institute Co.,Ltd.,Xining 810008,China)

机构地区：[1]中国电建集团青海省电力设计院有限公司,青海西宁810008

出　　处：《电力勘测设计》2024年第2期66-73,共8页Electric Power Survey & Design

摘　　要：采用无人机倾斜摄影测量技术,获得青海省某一区域影像和高程数据,基于ArcGIS强大的数据分析和处理能力,生成研究区三维可视化模型,并计算该区域坡度变率、坡向变率、地形起伏度和地面粗糙度等地形变化指标,提取山脊线和山谷线等地形特征参数,分析研究区地形地貌分布与变化情况。在此基础上,对研究区进行洪水淹没分析,模拟不同淹没深度条件下淹没区域变化情况。Using drone tilt photogrammetry technology,image and elevation data of a certain area in Qunke Town,Hualong County,Qinghai Province were obtained.Based on the powerful data analysis and processing capabilities of ArcGIS,a three dimensional visualization model of the study area was generated,and the area's slope variability(SOS),aspect variability(SOA),topographic undulation(QFD)and ground roughness were calculated And other terrain change indicators,extract the terrain feature parameters such as ridge lines and valley lines,and analyze the distribution and changes of the topography of the study area.On this basis,a flood inundation analysis was carried out on the study area,and the changes in the inundation area under different inundation depth conditions were simulated to provide a reference for the early warning and prevention of mountain flood disasters.

关 键 词：ARCGIS DEM 地表特征 

分 类 号：P339[天文地球—水文科学]