The Place of Groundwater Velocity in Estimation of Safe Distances Between Boreholes and Objectionable Vectors: The Case of Uzuakoli-Umuahia and Environs, Abia State Nigeria

B.o Eke, B.c Ejiogu, V. N Nwugha, A.o Emmanuel, B.u Nwaka, C.o Nwokocha and D.o Mba
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B.o Eke: Department of Integrated Science, Alvan Ikoku Federal University of Education, Owerri Nigeria
B.c Ejiogu: Department of Physics, Alvan Ikoku Federal University of Education, Owerri Nigeria
V. N Nwugha: Department of Basic Science, Alvan Ikoku Federal University of Education, Owerri Nigeria
A.o Emmanuel: Department of Science Laboratory Technology, Federal Polytechnic, Ngodo-Isuoch, Abia State Nigeria
B.u Nwaka: Department of Physics Alvan Ikoku Federal University of Education, Owerri Imo State, Nigeria
C.o Nwokocha: Department of Physics Alvan Ikoku Federal University of Education, Owerri Imo State, Nigeria
D.o Mba: Department of Mathematics Alvan Ikoku Federal University of Education, Owerri Imo State, Nigeria

International Journal of Latest Technology in Engineering, Management & Applied Science, 2025, vol. 14, issue 7, 580-587

Abstract: Groundwater plays a critical role in supplying clean water for domestic, agricultural, and industrial uses. However, its quality is highly susceptible to contamination from nearby objectionable vectors, such as septic tanks, landfills, and industrial waste sites. A fundamental factor influencing the risk and extent of contamination is the velocity of groundwater. Groundwater velocity is influenced by aquifer properties such as permeability, porosity, hydraulic gradient, and the nature of subsurface materials. Understanding this velocity is essential for assessing contamination risks and for estimating safe distances between boreholes and potential sources of pollution. The determination of safe distances requires a clear grasp of gcontaminant travel times, which are directly affected by groundwater flow velocity. Faster groundwater velocities reduce the time available for natural attenuation processes (like dilution, filtration, and chemical breakdown) and increase the risk of rapid contaminant transport to boreholes. Conversely, slower velocities may allow for sufficient natural purification before reaching a borehole, provided the distance is adequate. This paper highlights the critical place of groundwater velocity in risk assessments and regulatory frameworks for borehole siting .It emphasizes the need for site-specific velocity determination through field measurements or modeling and proposes methodologies for calculating minimum separation distances to safeguard groundwater supplies. A deeper understanding of groundwater dynamics not only protects public health but also enhances sustainable management of groundwater resources in the face of increasing anthropogenic pressures. The average seepage velocity in the study area is 0.4562 m/days while the highest and the lowest are respectively 0.9599 and 0.15483. This implies that areas bothering Isingwu-Ibeku and Ibeku –Fmc Umuahia axis which are above the average are pruned to faster contamination than the ones around Nkpa1-Nkpa2 and Ibeku-Amachara axis. To safeguard boreholes in these areas therefore more reassuring work has to be done by building strong concrete or impassable walls against the objectionable vectors.

Date: 2025
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