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Abstract

Summary

Landslide is one geological disaster with a high risk that often occurs in Central Java Province, including in the Loano Area, Purworejo District. .Today there are many people in Loano who dwell in areas prone to landslide. However, it is necessary to conduct integrative research activities as a form of disaster mitigation to reduce the landslide risk. Research conducted in the form of remote sensing, geological mapping and GIS (Geographic Information System) analysis. Remote sensing observation shows that the factors control the Landslide are the presence of non vegetation in the southeast and west side of the areas, the slope (<15O), less crystalline rocks, geological structure, and hydrothermal alteration minerals.The lithology is composed of 4 rock units: basaltic andesite, andesite, tuffaceous sandstone and andesite breccia. The alteration zone lies in the unit of andesite lava lithology. The various clay minerals minerals in the form of illite, smectite, and kaolinite are the result of hydrothermal alteration which can be classified as an argillic type. There are 10 points of landslide prone zone. The zone is characterized by a slope above 15o and a high alteration level. Highfall rate of rainfall (131 – 241mm/month) in Kulonprogo area also believed control the landslide.

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/content/papers/10.3997/2214-4609.201800372
2018-04-09
2024-04-25

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Integrated Remote Sensing and Geological Mapping to Identify Landslide Prone Zone in Loano, Purworejo, Central Java
Conference Proceedings 2018, 1 (2018); https://doi.org/10.3997/2214-4609.201800372
/content/papers/10.3997/2214-4609.201800372
/content/papers/10.3997/2214-4609.201800372
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