← Back to Sessions

Macro-Level Study of Seismically Induced Slope Stability in Kashmir Himalaya

Description: 

The necessity for efficient solutions to minimize the damage caused by seismically-induced landslides has prompted recent advances in methodologies for slope displacement mapping at the regional scale. However, the time horizon of hazardous occurrences is essential in rational hazard management. Kashmir Himalaya suffered tremendously from slope failure due to seismic activities, complex lithological and tectonic settings. In order to identify terrain stability, the Newmark displacement model has been applied to estimate the Factor of Safety (FOS) and displacement in the Kashmir Himalaya. The data set include a digital elevation model, landslide inventory, geotechnical database and surface-consistent peak ground acceleration. All the data have been rasterized into 30*30m grid cells on GIS. Combining these data sets in a dynamic model based on Newmark’s deformation analysis yields estimates of coseismic landslide displacement. The predicted FOS and displacement exhibit that the sliding blocks are unstable due to gravity sliding and/or seismic shaking. The displacements have been compared with the earthquake-triggered landslides to construct a probability curve relating predicted displacement to the probability of failure. This probability function can be applied to predict and map the spatial variability in failure probability in any ground-shaking conditions of interest.

Session: Coseismic Ground Failure: Advances in Modeling, Impacts and Communication

Type: Oral

Date: 4/20/2023

Presentation Time: 10:15 AM (local time)

Presenting Author: Arnab Sengupta

Student Presenter: Yes

Invited Presentation: 

Authors