Application of Slope Stability Analysis and Center of Mass Approach to Predict Landslide Run-out Distance and Velocity at Cibitung Landslide, Bandung Regency Ghina Almira Salsabila (a*) , Selly Feranie (a), Adrin Tohari (b)
a) Laboratoy of Earth and Space Science, Department of physics education, Indonesia University of Education (UPI), Jl. Dr. Setiabudhi No. 229, Bandung, Indonesia
b) Research Center for Geotechnology, National Research and Innovation Agency (BRIN), Jl. Sangkuring, Cisitu Bandung, Indonesia
Abstract
A pre-existing landslide mass may be unstable and pose a hazard to critical infrastructures during heavy rainfall. Proper understanding of such a risk is predicated on an accurate characterization of the hazard. This paper presents the application of slope stability analysis and the center of mass approach to predict run-out distance and velocity of the unstable pre-existing landslide mass in Cibitung, Bandung Regency. The slope stability analysis was performed using the Pybimstab and Slope/W software. The results of the slope stability analysis using both software resulted in a nearly similar location of the sliding plane within the Cibitung landslide mass. Based on calculations using the center of mass approach, the Cibitung landslide may be classified as an extremely rapid movement with a velocity of up to 7.7 m/s and a run-out distance of up to 38 m. Thus, the landslide risk is still prominent in the study area.
Keywords: Center of mass, landslide hazard, landslide velocity, run-out distance, slope stability
