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Successtivity of Frequency Ratio to Predict Landslide, Study Case Daerah Istimewa Yogyakarta and Surrounded Area
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, EAGE-HAGI 1st Asia Pacific Meeting on Near Surface Geoscience and Engineering, Apr 2018, Volume 2018, p.1 - 5
Abstract
To reduce landslide hazard’s damage potension, it’s necessary to do a mitigation by mapping the landslide susceptibility area. Frequency Ratio is still rarely to be applied in Indonesia. This research is made to shows the accuration rate of the frequency ratio method application in Indonesia, especially in the Special Region of Yogyakarta and Central Java, so it can be a renewal for landslide hazard mapping method in Indonesia, which can help the landslide hazard mitigation. Landslide occurance in Special Region of Yogyakarta and Central Java is controlled by triggering factors such as slope, lithology, distance from drainage, distance from geological strucure, precipitation, and landuse. The result of landslide hazard mapping in this area indicates that the most triggering factor is the slope factor, especially the steep slope. The validation of this landslide hazard map using frequency ratio method shows the accuration rate is about <80%, so this method is good to be applied to produce a landslide hazard map.