Interpretation of geophysical and GIS-based remote sensing data for sustainable groundwater resource management in the b
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Interpretation of geophysical and GIS‑based remote sensing data for sustainable groundwater resource management in the basement of north‑eastern Osun State, Nigeria Dele Falebita1 · Oluseyi Olajuyigbe1 · S. Sunday Abeiya2 · Oche Christopher3 · Ademola Aderoju1 Received: 27 January 2020 / Accepted: 19 August 2020 © Springer Nature Switzerland AG 2020
Abstract This study describes the interpretation of integrated GIS-based remote sensing and electrical resistivity geophysical methods as part of the need to provide groundwater overview for sustainable management in the basement of north-eastern Osun State, Nigeria. Six groundwater conditioning factors are synthesized based on the analytical hierarchy process and multi-criteria decision analysis to produce groundwater potential index map constrained by existing borehole yields. The results indicate that the estimated groundwater potential index map can serve as a gross predictor of the groundwater distribution in the region. This study may influence town planning and land use decisions for sustainable management of groundwater resource in the area. Keywords Sustainable groundwater management · Basement complex · GIS-based remote sensing · Surface geophysical · Nigeria
1 Introduction The south-western Nigeria is underlain by widespread occurrence of about 80% impermeable crystalline rocks which makes groundwater exploitation challenging and limits groundwater availability [48]. However, studies have shown that storage and transmission of groundwater is greatly influenced by local and regional fractures [3, 59] which may be associated with zones of high permeability and concentrated groundwater flow [14, 18, 26]. So, the search for groundwater based on adequate surface predrilling assessment may lead to appreciable ground water yield [5, 32, 37, 38]. Some common surface pre-drilling assessment tools useful in the search for potable groundwater in both sedimentary and basement complex environments are geographic information system (GIS)-based remote sensing
[50, 56] and surface geophysical methods such as electrical resistivity (ER) methods [24, 27]. While GIS-based remote sensing (RS) provides regional overview of the characteristics of geological features [8, 15, 44, 55, 60], electrical resistivity (ER) method delineates geoelectric parameters of the subsurface layers [1, 7, 19, 38, 39, 43, 46]. This is a case study that interprets GIS-based remote sensing and electrical resistivity data to map the groundwater potential in the north-eastern part of Osun State. This is with a view to suggesting sustainable groundwater abstraction in the region. The interpretation involves multi-thematic synthesis [4, 16, 23, 48, 51] of structural elements and aquifer parameters based on analytical hierarchy process (AHP) and multi-criteria decision analysis (MCDA) [6, 48, 50, 54]. This study could form part of the effort to providing for sustainable management of
* Dele Falebita, [email protected] | 1Department of Geology, Obafemi Awolowo University, Ile‑Ife, Nigeria. 2Depar
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