RELIABILITY OF GEOSPATIAL PARAMETRIC MODELS IN AQUIFER SUSCEPTIBILITY MAPPING: CASE STUDY OF ILE OLUJI SOUTHWESTERN NIGERIA

Olumuyiwa Olusola Falowo ()
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Olumuyiwa Olusola Falowo: Department of Civil Engineering Technology, Rufus Giwa Polytechnic, Owo, Ondo State, Nigeria

Geological Behavior (GBR), 2023, vol. 7, issue 1, 30-42

Abstract: The usefulness of groundwater vulnerability mapping cannot be overemphasized in planning, policy formulation and decision-making for groundwater management and protection. The present study employed geographic information system based overlay and index methods (DRASTIC, DRASTIC-LU, GOD and AVI models) in assessing and mapping groundwater vulnerability zones in Ile Oluji area of Ondo State, Southwestern Nigeria. The models’ parameters were prepared using hydrogeological (well/borehole) data, geophysical data, and satellite imageries. The weightage of different parameters was done using analytical hierarchy process. The DRASTIC map classified the area into the low vulnerability (30 % of the area), moderate (4%), high-vulnerability zone (60 %), and very high vulnerability zone (6 %). The DRASTIC-LU distinguished the area into high – very high groundwater vulnerability zone (90 %), while low – moderately low area has 10 % aerial extent. The GOD and AVI models, categorized the vulnerable areas into quite low (

Keywords: AHP; geophysical data; hydrogeological measurement; Ile Oluji; DRASTIC-LU (search for similar items in EconPapers)
Date: 2023
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Persistent link: https://EconPapers.repec.org/RePEc:zib:zbngbr:v:7:y:2023:i:1:p:30-42

DOI: 10.26480/gbr.01.2023.30.42

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