Mapping Of Groundwater Potential Zones Using Fuzzy Logic Technique At Kadamaian Basin, Kota Belud, Sabah

Abstract

This research were carried out to study the groundwater potential zones using Fuzzy logic technique at Lembangan Kadamaian, Kota Belud, Sabah and its surrounding. The lithological units of this study  mainly focus on the sedimentary rock of Wariu Formation, Crocker Formation and Trusmadi Formation, including the quaternary alluvium deposition unit of Kota Belud. Based on the structural geology analysis results, the deformation trends are in the Northwest - Southeast direction. The interpretation of groundwater potential zones carried out by using the ArcGIS Pro, R-studio and Global Mapper and several other mapping related software. Ten thematic maps that have been produced are lithological map, rainfall map, drainage density map, lineament density map, distant from river map, distant from lineament map, landform and land cover map, Topographic Wetness Index (TWI) map, rock porosity map, curvature map and slope steepness map. GIS techniques were used during the spatial analysis stage. All thematic maps have their own class values and are based on field data, relevant departments data, and remote sensing data. Further process were done using R-studio, Fuzzy Toolset, and Raster Calculator. These process afterwards will produced the groundwater potential map of the study area. The final result has been supported by the data of tube well from the Department of Minerals and Geosciences, Sabah and were validated using the ROC and AUC curve validation technique.