Willabo A. Miepamo et al. 2021. Aquifer Vulnerability Assessment in Ekowe, Bayelsa State, Niger Delta Area, Nigeria using GIS-Based on Drastic Method. Journal of Science & Technology (JST). 6, 3 (May 2021), 37–44. DOI:https://doi.org/10.46243/jst.2021.v6.i3.pp37-44.