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Reliability Of Geospatial Parametric Models In Aquifer Susceptibility Mapping: Case Study Of Ile Oluji Southwestern Nigeria

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  • Olumuyiwa Olusola Falowo

    (Department of Civil Engineering Technology, Rufus Giwa Polytechnic, Owo, Ondo State, Nigeria)

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 (

Suggested Citation

  • Olumuyiwa Olusola Falowo, 2023. "Reliability Of Geospatial Parametric Models In Aquifer Susceptibility Mapping: Case Study Of Ile Oluji Southwestern Nigeria," Geological Behavior (GBR), Zibeline International Publishing, vol. 7(1), pages 30-42, July.
    • Handle: RePEc:zib:zbngbr:v:7:y:2023:i:1:p:30-42
    DOI: 10.26480/gbr.01.2023.30.42
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