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All Journal SRIWIJAYA JOURNAL OF ENVIRONMENT
Oladosu, Stephen Olushola
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Agriculture, Biological Sciences & Forestry Energy Environmental Science Public Health

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Assessment of Groundwater Potential and Suitable Borehole Locations in Esan Central Using Remote Sensing and Geospatial Analysis Oladosu, Stephen Olushola; Eghemenrior Alenkhe, Mabel; Isesele, Obehi; Muhammad, Tijjani Yusuf
Sriwijaya Journal of Environment Vol 10, No 3 (2025): ENVIRONMENTAL ENGINEERING
Publisher : Program Pascasarjana Universitas Sriwijaya

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Abstract

Groundwater potential zone mapping is essential for identifying optimal sites for sustainable water infrastructure. This study presents a novel integration of ten environmental factors using remote sensing and GIS-based Analytical Hierarchy Process (AHP) to delineate groundwater potential zones and suitable borehole sites in Esan Central Local Government Area (LGA), Edo State, Nigeria. Unlike previous studies that focused on fewer variables, this research incorporates slope, geology, rainfall, drainage density, lineament density, land use/land cover, elevation, soil type, and proximity to infrastructure. The model was validated using 43 ground-truth locations with an overall accuracy of 85.3% and a Kappa coefficient of 0.78. Results showed that the majority of the area (65.2%) falls under moderate groundwater potential, while only 0.06% lies in the very high category. Borehole suitability analysis identified 43 optimal drilling locations. These findings provide actionable insights for planners and water agencies aiming to improve rural water access through scientifically grounded siting decisions.
Assessment of Groundwater Potential and Suitable Borehole Locations in Esan Central Using Remote Sensing and Geospatial Analysis Oladosu, Stephen Olushola; Eghemenrior Alenkhe, Mabel; Isesele, Obehi; Muhammad, Tijjani Yusuf
Sriwijaya Journal of Environment Vol 10, No 3 (2025): ENVIRONMENTAL ENGINEERING
Publisher : Program Pascasarjana Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22135/sje.2025.10.3.166-184

Abstract

Groundwater potential zone mapping is essential for identifying optimal sites for sustainable water infrastructure. This study presents a novel integration of ten environmental factors using remote sensing and GIS-based Analytical Hierarchy Process (AHP) to delineate groundwater potential zones and suitable borehole sites in Esan Central Local Government Area (LGA), Edo State, Nigeria. Unlike previous studies that focused on fewer variables, this research incorporates slope, geology, rainfall, drainage density, lineament density, land use/land cover, elevation, soil type, and proximity to infrastructure. The model was validated using 43 ground-truth locations with an overall accuracy of 85.3% and a Kappa coefficient of 0.78. Results showed that the majority of the area (65.2%) falls under moderate groundwater potential, while only 0.06% lies in the very high category. Borehole suitability analysis identified 43 optimal drilling locations. These findings provide actionable insights for planners and water agencies aiming to improve rural water access through scientifically grounded siting decisions.
Precision Bathymetric Survey for Marine Infrastructure: A Case Study of Bullnose Jetty, Lagos, Nigeria Sunday Alademomi, Alfred; Odumosu, Joseph Olayemi; Oladosu, Stephen Olushola
Sriwijaya Journal of Environment Vol 11, No 1 (2026): INFRASTRUCTURE AND ENVIRONMENTAL PRODUCTS
Publisher : Program Pascasarjana Universitas Sriwijaya

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Abstract

The bathymetric survey conducted at Bullnose Jetty, Apapa, Lagos, was an essential preparatory step for ongoing piling and repair activities. This study focused on evaluating seabed conditions along the quay-line to ensure safe engineering practices. Key objectives included the determination of seabed depth relative to average water levels, probing of proposed pile points (A-38_new, A-39_new, A-40_new) for clearance from debris, and identifying the location of a broken pile (A-39). The survey employed advanced equipment, including the South Echo-sounder and GNSS receiver, following systematic methodologies such as vertical accuracy checks, sounding route planning, and echo-sounding operations and videography. Depth measurements were calculated using acoustic signal travel times, with corrections for tidal variations and instrument lag. The 0.1 m grid interval used provided high-resolution data acquisition for the precise mapping of underwater conditions. Findings confirmed the absence of obstructive debris at proposed pile locations and identified the exact position of the broken pile to prevent any interference with repair works. This study showed and recommend the importance of detailed underwater assessments in maintaining marine infrastructure.
Co-Authors Eghemenrior Alenkhe, Mabel Isesele, Obehi Muhammad, Tijjani Yusuf Odumosu, Joseph Olayemi Sunday Alademomi, Alfred