基于3D激光扫描技术的风化花岗岩崩岗侵蚀泥沙来源空间分布研究

项目名称： 基于3D激光扫描技术的风化花岗岩崩岗侵蚀泥沙来源空间分布研究

项目编号： No.41301301

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 天文学、地球科学

项目作者： 温美丽

作者单位： 广州地理研究所

项目金额： 26万元

中文摘要： 本项目立足我国南方特有的严重侵蚀类型--风化花岗岩崩岗侵蚀，利用最新的三维激光扫描技术，对选定崩岗进行定期扫描，获取崩岗各个部位高密度高精度的三维数据，掌握从野外测量到室内崩岗侵蚀数据提取分析方法，从而全面了解崩壁、崩积锥、沟道和冲积扇等地貌单元的侵蚀与崩岗总侵蚀量之间的定量关系，探寻崩岗侵蚀内部形态的微观变化，分析崩岗系统侵蚀堆积过程，从而揭示崩岗侵蚀泥沙的空间来源。 本项目的主要创新点是，通过监测方法的突破，使崩岗各地貌单元形态研究更加完整、精细，使崩岗泥沙来源进入空间定量研究。研究结果将深入有力地推动崩岗侵蚀机理、侵蚀动力、侵蚀过程走向定量研究，也将为有效遏制崩岗侵蚀发展、为广东乃至南方崩岗侵蚀综合治理提供科学有力的决策依据，同时也将促进崩岗区经济社会可持续发展和社会主义新农村建设。

中文关键词： 崩岗侵蚀；三维激光扫描；侵蚀模数；DEM；降雨侵蚀力

英文摘要： Based on the serious erosion of the unique type of southern China-slump gully erosion, this study will access high density and precise 3D data of all parts of the weathered granite slump gully erosion by regular using the latest 3D laser scanning technology, and learn the methods of measuring in the field and extracting and analyzing data . The surveying data will explain the relationship between the amount of wall collapsed, of deposition and erosion in the colluvial mass, of erosion gully and alluvial fan, and the total erosion amount. These data also explain the process of internal morphological microchanges, erosion and deposition process, sediment sources. The main innovation of this project is more entirer and accurater monitoring the morphological changes of all parts, and to achieve quantitative spatial analysis of the sediment resource of slump gully erosion, by change of the monitoring method,. The result will further promote the slump gully erosion mechanism、erosion dynamic and erosion process research to the quantitative level, and can provide a strong scientific basis for controlling the erosion development and determining the appropriate conservation measures in Guangdong as well as the south of China, butalso significantly improve the sustainable economic and social development in the slump gully

英文关键词： Slump gully erosion；three-dimensional laser scanning；erosion modulus；DEM；rainfall erosivity