Abstract
Application of Unmanned Aerial Vehicles (UAV) or drones to detect landslide Hazard and risk assessment becomes uncommon methodology in Indonesia. Nowadays, in Indonesia drones are still popular to use for commercial, news interest and advertisement purposes only. It is not mainly used for detecting landslide hazard or risk assessment purposes. Furthermore, the landslide in Indonesia is a common worldwide phenomenon that often occur and can have a great impact on the infrastructures and sometimes tragically result in fatalities. UAV provide a quick, safe, effective, and potentially superior means of inspecting large-scale, remote and difficult to access landforms with significant cost benefits compared to traditional inspection method by manual tracking. UAV can derive the aerial photography which represents actual condition and landslide hazard instantly. By using an aerial photograph, it can simplify the engineer to obtain viewpoint and presumption related with the mechanism of the landslide, some factors triggering the landslide (terrain and topography, drainage, river stream, logged area, slope height, structure, and community, etc). The result suggests that UAC can be one of most effective value in surveying and large-scale inspection to determine landslide hazard as well as general site condition.
Highlights
The term landslide is sometimes felt to be inadequate because many types of slope movement do not involve sliding
Site observation can give more detail information due to the specific area which has already shown with an aerial photograph in general
Site observation showed the Toll Road was in landslide body on debris material
Summary
The term landslide is sometimes felt to be inadequate because many types of slope movement do not involve sliding. In geotechnical engineer point of view, determining the appropriate mechanism of landslide and potential hazard is the main key to decide slope protection and reinforcement in order to prevent future collapse or catastrophic failure. In a small hazard area, it was easy to conduct an inspection, site survey, and any other engineering requirement. In the large-scale area with hilly or mountainous terrain will be difficult to perform the traditional inspection by tracking. Unmanned Aerial Vehicle by using drones is one of the solutions to ease site survey and inspection, especially in difficult terrain area. Inaccessible and hazardous terrain can be inspected in real-time allowing assessment methodology to be adapted on site. It helps more understanding to around site condition and to ease geotechnical engineer in deciding the coverage area of slope protection against the future landslide (Fig. 2.)
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