| Summary: | Kundasang is located in a geohazard zone that consists of two active major regional faults and weak geomaterials with highly weathered, jointed and fractured rock. The existence of active faults are considered as one of the factors which influence the occurrence of large ground movement in the Kundasang area. Kg Lembah Permai which is located adjacent to the Kundasang town is one of the critical affected areas by progressively ground movement that had caused significant destruction to the permanent structures and infrastructures that lead to economic loss to the government and residents, respectively. This paper describes past and new data, and also the outcomes that have been integrated to redefine and update the ground instability mechanism in Kg Lembah Permai. Two new approaches of mapping have been applied. The first is remote mapping which involved detection and interpretation of local faults using Digital Terrain Model (DTM) derived from Lidar image. The second is on-site mapping of geodynamic features in the field using 3D approach. Results showed that most of the destruction exhibited towards +Y and -Z direction which represent the movement towards northeast and vertical downward respectively. From landslide modelling, the rate of displacement, geometry of the sliding surface and the current stability condition of the landslide can be quantified. It is expected that with detailed and comprehensive knowledge, a suitable design of geotechnical solution at difficult ground can be conducted accurately and objectively which eventually could promote sustainable development and enhancing public safety in the Kundasang area. © 2020 IOP Publishing Ltd. All rights reserved.
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