Open AccessThe Determination of Rainfall Threshold Triggering Landslides Using Remote Sensing
Author(s) -
Lisa Agustina,
Agus Safril
Publication year - 2021
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/893/1/012011
Subject(s) - landslide , remote sensing , intensity (physics) , environmental science , jackknife resampling , meteorology , geology , statistics , geography , mathematics , seismology , physics , quantum mechanics , estimator
Landslide is one of the natural disasters that can cause a lot of loss, both material and fatalities. Banjarnegara Regency is one of Central Java Province regencies where landslides often occur due to the region's topography and high intensity rainfall.. Therefore, it is necessary to determine the threshold of rainfall that can trigger landslides to be used as an early warning for landslides. The rainfall data used for the threshold is daily and hourly rainfall intensity from remote sensing data that provides complete data but relatively rough resolution. So that remote sensing data need to be re-sampled. The remote sensing data used is CMORPH satellite data that has been re-sampled for detailing existing information of rainfall data. The resampling method used is the bilinear method and nearest neighbor by choosing between the two based on the highest correlation. Threshold calculation using Cumulative Threshold (CT) method resulted equation P 3 = 7.0354 - 1.0195P 15 and Intensity Duration (ID) method resulted equation I = 1.785D -0305 . The peak rainfall intensity occurs at the threshold of 97-120 hours before a landslide occur.