Geology and landslide investigation using Resistivity Survey Method at Kampung Sungai Tupai, Gua Musang, Kelantan

The study area is located at Kampung Sungai Tupai, Gua Musang, Kelantan. It is located in the longitude between 101º58ʹ30.00ʹʹ to 102º01ʹ42.00ʹʹ E and latitude between 3º40ʹ05.00ʹʹ to 3º42ʹ42.15ʹʹ N. The research covered 25km2 of Gua Musang area. The aim of this research is to produce the geological map with scale of 1:25000 and to investigate the factor that triggers the slope failure in the study area. Geological map prepared by satellite image interpretation method. Digital Elevation Model (DEM) data extracted using Google Earth and the satellite image was obtained from USGS website. The data processed using ArcGIS software. The type of lithology identified in the study area is Tuffaceous Mudstone unit, Limestone unit, Sandstone unit, Granite unit and Alluvium unit. The factor for slope failure investigated using 2D Electrical Resistivity Imaging (ERI) method with two 200 m cable of Wenner-Schlumberger configuration. The obtained data processed by using RES2DINV software to determine subsurface condition of the area. Based on result of two resistivity pseudo sections, the main triggering factor of the landslides in study area is the presence of water and water accumulation that comes from the surface runoff that seeps into it.