摘要
在黄土高原六道沟小流域选择7条代表性切沟,以激光扫描法(laser scanning,LS)和实时动态差分(real-time kinematic,RTK)GPS的测量结果为基准,评估运动恢复结构(structure from motion,SfM)摄影测量法对切沟及切沟侵蚀的测量精度。与LS和RTK GPS相比,SfM摄影测量法所测各切沟DEM总体差异不大,平均高程差值为-0.162~0.436 m;SfM摄影测量法对切沟长度、表面宽度、周长和面积的测量精度较高,相对误差基本不超过±7%;所测深度和体积的相对误差较大,介于-37.4%~18.0%。与RTK GPS所测切沟侵蚀相比,SfM摄影测量法测得的切沟侵蚀空间分布和形态参数变化均十分接近。研究结果证实,SfM摄影测量法可作为一种高精度测量方法应用于黄土高原的切沟和切沟侵蚀监测。
The structure from motion(SfM)photogrammetry was used to measure seven typical gullies in the Liudaogou catchment located in the Loess Plateau,and the accuracy in quantifying gully and gully erosion was evaluated via comparing the results to those acquired with the laser scanning(LS)and real-time kinematic(RTK)GPS.The DEM measured with SfM photogrammetry for each gully were similar with those obtained using LS and RTK GPS,and the average elevation differences ranged from-0.162 to 0.436 m when subtracting the former from the latter.SfM photogrammetry exhibited high precisions in quantifying the length,surface width,perimeter and area of each gully,and the corresponding relative errors barely exceeded±7%.In contrast,the measurement errors of SfM photogrammetry were relatively greater for gully depth and volume,which ranged from-37.4%to 18.0%.Regarding gully erosion monitoring,both the spatial distribution of soil erosion and gully morphological parameter changes obtained by SfM photogrammetry were similar with those by RTK GPS.These results demonstrate that SfM photogrammetry can serve as a high-precision method for gully and gully erosion monitoring in the Loess Plateau.
作者
陈薪伊
史扬子
杨扬
黄婷婷
刘瑛娜
张光辉
CHEN Xinyi;SHI Yangzi;YANG Yang;HUANG Tingting;LIU Yingna;ZHANG Guanghui(State Key Laboratory of Earth Surface Processes and Resource Ecology,Faculty of Geographical Science,Beijing Normal University,Beijing 100875,China;School of Geography,Faculty of Geographical Science,Beijing Normal University,Beijing 100875,China;Monitoring Center of Soil and Water Conservation,Ministry of Water Resources,Beijing 100053,China)
出处
《陕西师范大学学报（自然科学版）》
CAS
CSCD
北大核心
2023年第6期25-36,共12页
Journal of Shaanxi Normal University：Natural Science Edition
基金
国家自然科学基金(42130701,41601277)。
关键词
切沟
切沟侵蚀
SfM摄影测量法
激光扫描法
实时动态差分GPS
黄土高原
gully
gully erosion
structure from motion(SfM)photogrammetry
laser scanning
real-time kinematic(RTK)GPS
the Loess Plateau
