An integrated approach of Remote Sensing and GIS techniques was adopted to carry out groundwater potential evaluation for suitable siting of boreholes potential in Lang tang North LGA of Plateau state, Nigeria. SPOT5 imagery of 2005 was used to generate a landuse/landcover thematic map and sentinel Radar image was used to generate a thematic map of lineament structures. Topographic parameters such as contours, slopes and drainage density were generated from Digital Elevation Model (DEM) while the lithology (Rock types) map was generated from the Geological map of Nigeria. The soils type of the study area was also generated from the soil map of Nigeria. All the thematic maps generated; lineament density, drainage density, slop, soil lithology, landuse and landcover were integrated and analyzed in Geographic Information System (GIS) environment using fuzzy logic overlay analysis model. The maps were reclassified into groundwater potential zone. Coordinate points of existing boreholes were collected during a field survey which was used in validating the ground water potential map. The results show that groundwater potential zone demarcated through the model is in agreement with most of the borehole yield information data. It was also found out that the groundwater prospecting zone in the various themes are attributed into five ranks as very high, high moderate, moderate low and very low. It was concluded that integration of remote sensing and GIS using fuzzy models has provided a powerful tool in siting suitable site for groundwater prospecting.
Groundwater, borehole, lineaments, suitable site, Remote sensing, GIS, fuzzification.
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