Journal cover Journal topic
Natural Hazards and Earth System Sciences An interactive open-access journal of the European Geosciences Union
https://doi.org/10.5194/nhess-2017-227
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 4.0 License.
Research article
03 Jul 2017
Review status
This discussion paper is a preprint. It is a manuscript under review for the journal Natural Hazards and Earth System Sciences (NHESS).
Geomorphological evolution of landslides near an active normal fault in Northern Taiwan, as revealed by LiDAR and unmanned aircraft system data
Kuo-Jen Chang1, Yu-Chang Chan2, Rou-Fei Chen3, and Yu-Chung Hsieh4 1Department of Civil Engineering, National Taipei University of Technology, Taipei, 10654, Taiwan, R.O.C.
2Institute of Earth Sciences, Academia Sinica, Taipei, Taiwan, R.O.C.
3Departement of Geology, Chinese Culture University, Taipei, 11114, Taiwan, R.O.C.
4Central Geological Survey, MOEA, Taipei, Taiwan, R.O.C.
Abstract. Several remote sensing techniques, namely traditional aerial photographs, an unmanned aircraft system (UAS), and airborne LiDAR, were used in this study to decipher the morphological features of obscure landslides in volcanic regions. A morphological reconstruction method was proposed to assess landslide morphology based on the dome-shaped topography of the volcanic edifice and the nature of its morphological evolution. Two large-scale landslides in the Tatun volcano group in Northern Taiwan were targeted to more accurately characterize the landslide morphology through airborne LiDAR and UAS-derived digital terrain models and images. With the proposed reconstruction method, the depleted volume of the two landslides was estimated to be at least 820 ± 20 × 106 m3, approximately six times higher than the reported largest landslide volume in Taiwan. Normal faulting in the region likely played a role in triggering the two landslides, because there are extensive geological and historical records of an active normal fault in this region. The subsequent geomorphological evolution of the two landslides is inferred to account for the observed morphological and tectonic features, as characterized using the remote sensing techniques.

Citation: Chang, K.-J., Chan, Y.-C., Chen, R.-F., and Hsieh, Y.-C.: Geomorphological evolution of landslides near an active normal fault in Northern Taiwan, as revealed by LiDAR and unmanned aircraft system data, Nat. Hazards Earth Syst. Sci. Discuss., https://doi.org/10.5194/nhess-2017-227, in review, 2017.
Kuo-Jen Chang et al.
Kuo-Jen Chang et al.
Kuo-Jen Chang et al.

Viewed

Total article views: 271 (including HTML, PDF, and XML)

HTML PDF XML Total BibTeX EndNote
203 65 3 271 2 4

Views and downloads (calculated since 03 Jul 2017)

Cumulative views and downloads (calculated since 03 Jul 2017)

Viewed (geographical distribution)

Total article views: 271 (including HTML, PDF, and XML)

Thereof 271 with geography defined and 0 with unknown origin.

Country # Views %
  • 1

Saved

Discussed

Latest update: 18 Nov 2017
Publications Copernicus
Download
Share