[1]LIU Chao,DU Peng,LEI Qiyun,et al.Fine Geomorphic Interpretation and Quantitative-parameter Extraction of the Active Structure of Mengjiawan of the Tianjingshan Fault Based on UAV Photogrammetric Technique[J].Journal of Seismological Research,2022,45(01):100-108.[doi:10.20015/j.cnki.ISSN1000-0666.2022.0011
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Fine Geomorphic Interpretation and Quantitative-parameter Extraction of the Active Structure of Mengjiawan of the Tianjingshan Fault Based on UAV Photogrammetric Technique
Journal of Seismological Research[ISSN 1000-0666/CN 53-1062/P] Volume:
45
Number of periods:
2022 01
Page number:
100-108
Column:
Public date:
2022-01-20
- Title:
- Fine Geomorphic Interpretation and Quantitative-parameter Extraction of the Active Structure of Mengjiawan of the Tianjingshan Fault Based on UAV Photogrammetric Technique
- Keywords:
- UAV photoqrammetric technique; the Tianjingshan Fault; tectonic landforms; fine interpretation; quantitative parameters
- CLC:
- P315.2
- DOI:
- 10.20015/j.cnki.ISSN1000-0666.2022.0011
- Abstract:
- The Unmanned Aerial Vehicle(UAV)photogrammetric technique was used to collect the topographic and geomorphic data of Mengjiawan observatory site in the Tianjingshan Fault in order to get the digital elevation model.Then,through fine interpretation of tectonic geomorphology,the horizontal displacement and vertical dislocation of seismic faults were extracted.The average horizontal slip rate of the fault was calculated,and the paleoseismic events were analyzed and identified.The results show that:①Three stages of river terraces T3,T2 and T1 developed in the study area,and all of them were interrupted,but the latest gully T0 was not disturbed.②The average,horizontal,slip-rate since the middle of Holocene was 0.86-0.91 mm/a,which was calculated on the basis of the horizontal displacement of(7.77±0.98)m on the T1 terrace.③The vertical dislocation across the steep ridge on terrace T1 was(0.61±0.11)m,and the terrace's slope had two obvious inflection points,which represented two seismic events in the form of surface rupture.It was presumed that there had been at least two seismic events in the form of surface rupture since the end of the Late Pleistocene or the beginning of the Holocene,namely 12 000 years ago.
- References:
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Last Update:
2022-01-20