无人机提取走滑断裂构造信息——以西准噶尔冬别列克断裂为例

由断层活动形成的构造地貌是强震与长期地表过程共同作用的结果,其形态包含着丰富的构造信息.但受限于测量技术和精度,如何从复杂的构造地貌中识别这一信息一直都是活动构造研究的难点.文中结合运动重建模型(SFM,Structure from Motion)的无人机(UAV,Unmanned Aerial Vehicle)低空航...

USING UAV PHOTOGRAMMETRY TECHNOLOGY TO EXTRACT INFORMATION OF TECTONIC:A CASE STUDY OF THE DONGBIELIEKE FAULT,WEST JUNGGAR

The tectonic landform formed by fault activity is a result of the interaction of strong earthquake and long-term surface process.Due to the limitation of measurement technique and precision,how to identify this information from the complex tectonic landform has always been a difficult problem in active tectonic research.This paper combines the low-altitude aerial survey technology of UAV(Unmanned Aerial Vehicle)with the SFM(Structure from Motion).The typical fault tectonic deformation area(Ahebiedouhe terrace and Wulexuetehe terrace)of the Dongbielieke strike-slip fault on the western Junggar basin was selected as the research object.We used UAV to take aerial photos of the study area,and obtained the large proportion of Digital Orthophoto Model(DOM)and digital elevation Model(DEM)of the fault.Through understanding and translating the fine division of geomorphic units and the cutting relation of faults,accurate tectonic activity information of faults is obtained.Finally,we compared the dislocations of the terraces in the two typical regions,analyzed the terraces along the fault,and divided four levels of terraces.These terraces are Ta5(49.7±1.9 m)、Ta4 max(30.7±2.1 m)、Ta4 min(20.1-22.8 m)、Ta3(12.0-12.7 m)and Ta2(8.7±0.6 m),respectively.