利用三维激光扫描技术动态监测沟蚀发育过程的方法研究  

Methodology of Dynamic Monitoring Gully Erosion Process Using 3D Laser Scanning Technology

作　　者：张姣[1,2] 郑粉莉[1,2] 温磊磊[1,2] 俞方圆[1,2] 安娟[2,3] 李桂芳[2,3] 

机构地区：[1]西北农林科技大学资源环境学院,陕西杨陵712100 [2]中国科学院水利部水土保持研究所黄土高原土壤侵蚀与旱地农业国家重点实验室,陕西杨陵712100 [3]中国科学院研究生院,北京100049

出　　处：《水土保持通报》2011年第6期89-94,共6页Bulletin of Soil and Water Conservation

基　　金：国家自然科学基金项目"黄土丘陵区发育活跃期切沟侵蚀过程研究"(40871137);国家基础研究(973)发展计划项目"不同类型区土壤侵蚀过程与机理"(2007CB407201)

摘　　要：在介绍三维激光扫描技术基本原理的基础上,详述了应用三维激光扫描技术实现沟蚀发育过程动态监测的方法和流程,包括扫描测量前期准备、扫描测量、点云预处理、坐标转换、TIN及等高线的生成、侵蚀量的估算等。以沟蚀发育过程的模拟降雨试验为案例,介绍了应用三维激光扫描技术进行沟蚀发育过程动态监测的方法,包括实地数据采集、点云分析处理和建模等,并分析了本案例基于三维激光扫描技术估算侵蚀量的精度,其平均精度达到96.85%。建议在野外应用三维激光扫描技术动态监测沟蚀过程时结合GPS进行辅助测量。This paper introduced the basic principles of laser scanning technology（LIDAR）,and specified the method of application the LIDAR to dynamically monitor gully erosion processes,which included measuring preparation,scanning survey process,point cloud pre-processing,coordinate transformation,TINs generation and soil loss estimation.Taking the experimental study on the gully erosion processes by simulating rainfall as a study case,dynamic monitoring method of gully erosion process using LIDAR was described in detail,which comprised field data collection,point cloud analysis,and mesh modeling.Comparison of the measured soil loss and the estimated soil loss showed that LIDAR technology has high accuracy to monitor soil erosion,and the estimating accuracy reaches to 96.85%.It suggests that the LIDAR should be combined with GPS technology to monitor gully erosion in field experiment.

关 键 词：监测方法 三维激光扫描技术 沟蚀 

分 类 号：S152[农业科学—土壤学] P204[农业科学—农业基础科学]