Research article

Assessment of Groundwater Vulnerability to Contamination in Imo River Basin Southeastern Nigeria Using DRASTIC and GOD Models

*¹Terhemba Theophilus Emberga, ²Alexander Opera, ²Samuel Onyekuru, ¹Alexander Omenikoro, ³Ali Bilar, ¹Chika Abara Josiah, ¹Uhiara Chukwemeka 

¹Department of Physics/Electronics, Federal Polytechnic Nekede, Owerri

²Department of Geology, Federal University of Technology, PMB 1526 Owerri

³Department of Chemistry, Federal University of Technology, PMB 1526 Owerri

⁴Department of Chemistry/Biochemistry, Federal Polytechnic, Nekede, Owerri

*Correspondent Author Email: terhemba4sure@yahoo.com

Accepted 25 January, 2023

Abstract

The aim of this study is to use DRASTIC and GOD model in determining groundwater vulnerability to contamination in Imo River Basin southeastern Nigeria. According to DRASTIC model, 12% has a low class of groundwater vulnerability to contamination, whereas a total of 32% of the study area has moderate vulnerability and 56% has high vulnerability. The value for GOD model was 46.2% of low vulnerability and 53.8% of high vulnerability respectively. The final results indicate that the aquifer system in the interested area is not protected from contamination. To mitigate the contamination risks, a protective measure must be adopted.

Keywords: DRASTIC, GOD, Vulnerability, Imo River Basin