1st International Undergraduate and Postgraduate (IUP ’17) Students Conference on Marine, Maritime Technology and Management 2017 11 December – 12 December 2017, University Malaysia Terengganu RIVERBANK EROSION MAPPING USING HIGH RESOLUTION SATELLITE IMAGE AND UNMANNED AERIAL VEHICLE (UAV) APPROACH Norhafizi Mohamad, a , Mohd Faisal Abdul Khanan, a , Ivin Amri Musliman, a , Wan Hazli Wan Kadir , a , Anuar Ahmad, a , Muhamad Zulkarnain Abdul Rahman, a , Mohamad Hidayat Jamal, b ,Munim Zabidi , c , Norhaida Mohd Suaib, d , Rozilawati Dollah@Mohd Zain, d . ªFaculty of Geoinformation & Real Estate, Universiti Teknologi Malaysia b Faculty of Civil Engineering, Universiti Teknologi Malaysia c Faculty of Electrical Engineering, Universiti Teknologi Malaysia d Faculty of Computer, Universiti Teknologi Malaysia Abstract Riverbank erosion is a serious environmental issue which urges government to take appropriate action to solve this problem. Kilim River, Langkawi Geopark which is located at the northern part in Peninsular Malaysia is now under the threat of critical reduction caused by intensification of tourism activities. The purpose of this study is to assess riverbank erosion by using combination of geospatial techniques consist of high resolution imagery and unmanned aerial vehicle (UAV) approaches. Both images from UAV and Quickbird is rectify and process by using GIS and remote sensing software in order to determine the erosion area of river, based on Kilim River area comparison between 2005 until 2016. Subsequently, Empirical Bayesian Kriging (EBK) analysis become main option to predict riverbank erosion in future based on present erosion data by using interpolation method and the other method of interpolation is also used as the comparison. The finding shows that the Kilim River is changes during in between 2005 and 2016 due to several factors such as boat wakes and sea level rise (SLR). The area of Kilim River is increasing from 16.72 acres to 23.2 acres within eleven years and means that 6.48 acres of mangrove forest is eroded. 38% of mangrove riverbank in that area is considered of having erosion and deposit into the river. If it continuously happens, more area of mangrove forest will be eroded in the future. Interpolation of riverbank erosion in future indicates about more than 30 acres of mangrove riverbank erosion will be eroded for the next 10 years. For this study, perhaps the geospatial technologies are can be utilized in environmental study for detection of riverbank erosion. Keywords: Riverbank erosion, remote sensing, geographical information system, unmanned aerial vehicle, geospatial assessment