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All Journal Journal of Degraded and Mining Lands Management
Bilaro, Virgil B.
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology

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Determination of seasonal groundwater recharge potential in the coastal mining town of Jose Panganiban, Philippines Bilaro, Virgil B.; Samaniego, Jessie O.; Quierrez, Rico Neil M.; Peregrino, Fern Rose A.; Paladin, Carr Angelo P.; Tamparong, Bonifacio Jr. B.; Bautista, Angel VII T.
Journal of Degraded and Mining Lands Management Vol. 13 No. 4 (2026)
Publisher : Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15243/jdmlm.2026.134.10903

Abstract

Coastal groundwater resources are highly vulnerable to the combined risks of heavy metal contamination and saltwater intrusion where artisanal small-scale gold mining is active. This study used a GIS-based analysis to identify susceptible coastal aquifers in the municipality of Jose Panganiban, Philippines, by examining the reduction in groundwater potential coincident with the seasonal oscillation of precipitation, the main driver of recharge. The study showed that the general reduction in groundwater potential approaches 25% during the period with the lowest precipitation across the whole study site. Some recharge zones have greater groundwater potential reduction and are thus more vulnerable to saltwater intrusion. The results of this study would lay the preliminary groundwork for more detailed and targeted analysis of at-risk groundwater extraction locations, as well as serve as a guide for local authorities in formulating and implementing an effective, responsive, and sustainable groundwater resource management program.
Co-Authors Bautista, Angel VII T. Paladin, Carr Angelo P. Peregrino, Fern Rose A. Quierrez, Rico Neil M. Samaniego, Jessie O. Tamparong, Bonifacio Jr. B.