Run-Out Distance and Velocity Prediction of Landslide Movement in Pasirjambu, Bandung with pyBIMstab and GeoStudio Modelling Fuji Lestari (a*), Selly Feranie (a), Adrin Tohari (b)
a) Laboratory of Earth and Space Science, Department of Physics Education, Indonesia University of Education (UPI), Bandung, Indonesia
*fujilestari26[at]upi.edu
b) Research Center for Geotechnology, National Research and Innovation Agency (BRIN), Bandung, Indonesia
Abstract
Rainfall-induced landslides are a very common occurrence in hilly regions in West Java Province. Efforts to mitigate the landslide hazard require knowledge about the landslide hazard characteristics. This paper presents the results of an analytical study aimed to determine the sliding surface and to predict the run-out distance and velocity of the Pasirjambu landslide, Bandung Regency. For these objectives, the slope stability analysis was performed using pyBIMstab and Slope/W software, and the run-out distance and velocity were predicted using the center of the mass approach. The results of slope stability analysis show that a good agreement of sliding surface location for a critical safety factor was obtained using both slope stability software. The predicted run-out distance and velocity indicate that the Pasirjambu landslide is likely to exhibit a long run-out of 87 m and move at a velocity of about 8.3 m/s. Thus, the Pasirjambu landslide hazard would pose a significant risk to the residents below the landslide zone.
