Topographic changes due to the 2008 Mw7.9 Wenchuan earthquake as revealed by the differential DEM method

Erosion Associated with Seismically-Induced Landslides in the Middle Longmen Shan Region, Eastern Tibetan Plateau, China

“…In this study, we estimated the seismically-induced erosion associated with landslides using the DEM differential method [26] and the landslide volume information from Li et al [11].…”

“…Here, we use the DEM differential method [26] to calculate the minimum landslide volume within the landslide area by subtracting the pre-earthquake DEM from the post-earthquake DEM. In the middle Longmen Shan region, one typical site (near the Pengguan Massif) was selected to derive the pre-and post-earthquake DEM.…”

“…By comparing the Remote Sens. 2017, 9, 864 4 of 12 pre-earthquake DEM elevation with 14 continuous GPS observation sites, a mean elevation error of ±4.1 m, and a median error of ±3.6 m were determined [26]. In the error analysis, the median error is most appropriate in describing the level of elevation error [42] because the distribution of the elevation errors is not precisely known.…”

“…In this study, we use the pre-and post-earthquake digital elevation models (DEM) to derive the co-seismic landslide volume and to calculate the amount of seismically-induced erosion at one typical region within the Longmen Shan region [26]. We also compare the amount of erosion obtained from the differential DEM method with previous results of landslide volumes proposed by Li et al [11].…”

“…The role of erosion on the morphological evolution of plateau margins has been widely reported [22][23][24][25][26][27]; however, the co-seismically-induced erosion associated with strong earthquakes has rarely been quantitatively reported. Most geomorphological studies [20,22,24,[28][29][30] have focused on long-term erosion at the million-year scale, and short-term erosion rates at the thousand-year to decade scale.…”