GIS application for comprehensive spatial landslide analysis in Kayangan Catchment, Menoreh Mountain, Java, Indonesia
Danang Sri Hadmoko1,2, Franck Lavigne2, Junun Sartohadi1, Guruh Samodra1, Nugroho Christanto1
This research provides a comprehensive analysis of landslide distribution in the Kayangan catchment, eastern part of Menoreh Mountains, Java, Indonesia. Raster-based GIS was applied in order to analyze the spatial distribution of landslides with parameters maps, e.g. slope, geology, geomorphology, drainage network, landuse, and road networks. 131 landslides were inventoried in the study area through internal reports of village offices followed by extensive field work. Four types of landslides were identified in the study area: slides, slumps, rockfalls, and flows. The landslides are distributed on a wide range of slope gradient and geological setting. Landslide density was 4.21 events/km2. Most of the landslides occurred on slope gradients ranging from 20 to 30o (35%), and were associated with roads. The landslides events were controlled not only by natural factors but also human activities mainly roads construction.
Keywords: landslides, geographic information system, spatial analysis.