Rock Falls

Indonesia's sustainable development system should be disaster-based mitigation. This research aims to analyze spatial geomorphology aspects, that identifies the potential and vulnerability of disaster that can be caused in Leato area (North Leato and southern Leato) at District Dumbo Raya of Gorontalo. Geomorphologically studied aspects using Geographic Information System (GIS) Global Mapper v12 and ArcGIS v10.3. Geomorphological analysis at the location of the research found that the area has coastal morphography up to the steep hills with an average height of 200-500 mdpl and morphometry of 8o to > 55o. Active morphostructure of tectonic activity which lasted relatively continuously since the Eocene - Early Miocene to Quarter, thus making it prone to high earthquake disaster that could become the trigger factor of a landslide. These influences resulted in the formation of geological structures including lithology breakthrough units Diorite Bone (Tmb) and Volcanic rocks Pinogu (TQpv) with a sturdy system that makes the weathering process run intensively on the body of the rock. Rock weathering conditions is a passive morphostructure of a landscape that can affect the cohesiveness of rocks so that some of them become rock fall type material avalanches. In terms of the morphology of the research area, the closure and use of land such as dryland and shrub farming to land and residential land transportation routes make the area not only vulnerable to landslides but also becomes vulnerable to a particularly adverse disaster on sustainable development in Gorontalo.

Keyword: geomorphology, gis, sustainable development, leato, rock fall landslides