Paper Info
Title
Topographic Evolution Involving Co-Seismic Landslide, Deformation, Long-Term Folding And Isostatic Rebound: A Case Study On The 2004 Chuetsu Earthquake
Abstract
Co-seismic landslide volume information is critical to understanding the role of strong earthquakes in topographic and geological evolution. The availability of both pre- and post-earthquake high-resolution digital elevation models (DEMs) provides us with the opportunity to develop a new approach to obtain robust landslide volume information. Here, we propose a method for landslide volume estimation and test it in the Chuetsu region, where a Mw 6.6 earthquake occurred in 2004. First, we align the DEMs by reconstructing the horizontal difference. Then, we quantitatively obtain the landslide volume in the epicentral area by differencing the pre- and post-earthquake DEMs. We convert the landslide volume into the distribution of average catchment-scale denudation and the resulting long-term crustal rebound. Our findings reveal that the Chuetsu earthquake mainly roughens the topography in the low-elevation Chuetsu region. Our results indicate that the preserved topography not only is due to the uplift caused by fault-related folding on the hanging wall of the Muikamachi fault but also undergoes erosion caused by seismically induced landslides and crustal rebound also modifies the topography in the long term. This study confirms that the differential DEM method is a valuable approach for quantitative analysis of topographic and geological evolution.
Year
DOI
Venue
2021
10.3390/rs13061073
REMOTE SENSING
Keywords
DocType
Volume
Chuetsu earthquake, topographic change, LiDAR, Differential DEM, denudation
Journal
13
Issue
Citations 
PageRank 
6
0
0.34
References 
Authors
0
5
Name
Order
Citations
PageRank
Jinghao Lei100.34
Zhikun Ren200.34
Takashi Oguchi300.34
Peizhen Zhang431.05
Shoichiro Uchiyama500.34