The incidence of landslides and the fact that a large number of people live in areas vulnerable to landslides lead to a high death toll in Java Island, Indonesia – more than 1,112 people in the period 1999 to 2005. The study site has an area of 55.56 hectares, along Cinomati Street, Dlingo, and Pleret Sub District, Bantul District, Daerah Istimewa Yogyakarta Province, Indonesia. The methods that use in this study are, Sentinel-2 Imagenery and Geological data. The purpose of this study is to determine the landslides prone area in the study site. The methods used in this study are Sentinel-2 Satellite Imagery and geological data. Along the Cinomati road based on geological data, it has a weak area that has the potential for landslides from the continuation of the Opak fault and rock formation boundaries. Landslide area are locations with complex geological conditions and sparse vegetation. In other rare vegetation besides the location of landslides, it also needs to be aware of other potential landslides, because this research is limited to sentinel images with a density of 10m2.
Provenance can be used to determine how the sedimentary rock formed, as reflected in the mineral composition of lithology as the composition of sedimentary minerals. The Research area is located in the Hargowilis area, Kokap district, Kulon Progo Regency, Daerah Istimewa Yogyakarta Province. This Study uses a surface geological mapping method supported by laboratory analysis in the form of petrographic analysis. Based on the analysis of the sandstone provenance in the study area, the results show the research area is included in the Recycled orogenic provenance zone, foreland uplift sub-zone to continental block provenance with a dominant quartz percentage (92%). The tectonic setting in the research area was controlled by an orogenous process during the Eocene showing that the analysis is very relevant to the provenance in the research area which shows the source of recycled rock due to the orogenous process which is then deposited in the basins formed as a result of the process.
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