Open AccessAnalysis of the landslide susceptibility map using frequency ratio method in sub-sub-Watershed Mamasa
Author(s) -
Rizki Amaliah,
Andang Suryana Soma,
Baharruddin Mappangaja,
Friska Mambela
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 - 10.1088/1755-1315/886/1/012088
Subject(s) - watershed , landslide , lithology , hydropower , precipitation , hydrology (agriculture) , closure (psychology) , environmental science , geology , sedimentation , erosion , fault (geology) , geomorphology , physical geography , sediment , geography , geotechnical engineering , meteorology , engineering , seismology , computer science , paleontology , machine learning , economics , electrical engineering , market economy
Landslides that often occur in the Subs watershed of Mamasa increase the sedimentation rate so that the Bakaru hydropower plant becomes less than optimal. The contributing factors to lanslide susceptibility are land closure, lithology, curve, slope direction aspect, slope, precipitation, fault distance, and river distance. The research aims to determine the most influential erosion causative factor in Mamasa Sub-watershed by building a landslide susceptibility map using the frequency ratio method. The most significant factor is land closure, with a value of 2.03, indicating a high probability of lanslide events. The model’s success rate and prediction rate’s success rate were expressed fairly well with 0.754 and 0.752. Based on the insanity map, the Region is very high and high at 23.74% and 12.52%; insanity is moderate, low, and very low consecutively at 27.44 %, 23.77, and 12.33%.