Evaluation of Groundwater Potential from Pumping Test Analysis and Vertical Electrical Sounding Results: Case Study of Okigwe District of Imo State Nigeria.
2013; RELX Group (Netherlands); Linguagem: Inglês
ISSN
1556-5068
AutoresLeonard Nwosu, Anthony S. Ekine, Cyril N. Nwankwo,
Tópico(s)Groundwater flow and contamination studies
ResumoGroundwater potential evaluation of Okigwe District of Imo State of Nigeria was carried out based on 120 vertical electrical soundings (VES) in the area. The Schlumberger electrode array was adopted with a maximum electrode spread of 900m. Twelve of the VES stations were sited near existing boreholes to enhance interpretation. The results revealed a multi- layered earth. The resistivity of the aquiferous zones ranged from 33.1Ωm obtained at Umuedi (VES 7) in the northern part to 32600Ωm obtained at Otoko (VES 93) in the southern part of the area. The highest aquifer thickness of 104.4m was recorded at Amonze (VES 95). The hydraulic conductivity values obtained from the VES results varied from 9.8854 to 115.9646 m/day. The transmisivity values ranged from 992.04 to 10263.65m 3 /day. The storativity values determined for the area ranged from 1.59x10 -4 to 7.80x10
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