Determination of aquifer characteristics

2014 ◽  
pp. 202-223
Keyword(s):  
Aquifer Characteristics

To: “Geoelectric sounding for the determination of aquifer characteristics in parts of the Umuahia area of Nigeria” by P. D. C. Mbonu, J. O. Ebeniro, C. O. Ofoegbu, and A. S. Ekine (GEOPHYSICS, 56, p. 284–291, February 1991)

Geophysics ◽  
1991 ◽  
Vol 56 (6) ◽  
pp. 898-898 ◽  
Keyword(s):  
Hand Column ◽  
Right Hand ◽  
Aquifer Characteristics

In our article, the following corrections should be made: On p. 289, right‐hand column, first paragraph, “[equation 6]” should read [equation 5]. On p. 290, Figures 11 and 12 are interchanged. The captions are correct but the figures should be switched.

Geoelectric sounding for the determination of aquifer characteristics in parts of the Umuahia area of Nigeria

Geophysics ◽  
1991 ◽  
Vol 56 (2) ◽  
pp. 284-291 ◽  
Author(s):  
P. D. C. Mbonu ◽  
J. O. Ebeniro ◽  
C. O. Ofoegbu ◽  
A. S. Ekine
Keyword(s):  
Hydraulic Conductivity ◽  
Test Data ◽  
Pumping Test ◽  
Model Parameters ◽  
Current Electrode ◽  
Entire Area ◽  
Maximum Current ◽  
Electrical Soundings ◽  
Aquifer Characteristics

Seventeen Schlumberger vertical electrical soundings (VES) were carried out in parts of the Umuahia area of Nigeria, using a maximum current electrode separation of 1 km. The data were interpreted using a conventional partial curve‐matching method to obtain initial model parameters, which were used in a computer program to obtain final parameters. Three soundings were made at existing boreholes for comparison. Aquifer parameters of hydraulic conductivity and transmissivity were obtained by analyzing pumping test data from existing boreholes. The results of the interpretation revealed three distinct geoelectric layers overlying a conductive geoelectric basement. Based on the model obtained, aquifer hydraulic conductivity and transmissivity were calculated. The hydraulic conductivity calculated agreed closely with that determined from pumping test data. The results of the present study also indicate that the entire area is divided into two zones, each of which is homogeneous in hydraulic properties and water quality, but distinct from the other zone. A local groundwater divide between the Imo and Kwa‐Ibo drainage systems was also defined.

scholarly journals Determination of Aquifer Characteristics in Okija, Anambra State, Nigeria

2020 ◽  
Vol 5 (1) ◽  
Author(s):  
Andy O Ibeje
Keyword(s):  
Water Resources ◽  
Selection Criterion ◽  
Formation Constants ◽  
Anambra State ◽  
Hydrogeological Parameter ◽  
Novel Approach ◽  
Aquifer Characteristics ◽  
And Storage ◽  
Method Model

Knowledge of hydraulic properties of groundwater aids economic and environmentally friendly exploitation of water resources in water-scare rural area such as Okija. In this study therefore, the aquifer constants are evaluated for Okija town in Ihiala Local Government Area of Anambra State, Nigeria to facilitate efficient and effective exploitation of the water resources in the area. The drawdown test involved pumping down the water level and monitoring the response of hydraulic head in the surrounding aquifer. The computation of formation constants is performed in three ways: Theis method, Cooper-Jacob method and Chow method. Model Selection Criterion (MSC was used to evaluate the discharge predictions from the three methods. The results show that transmissivity and storage coefficient for Theis method are 256. 37 m2/day and 146.67 m2/day; Cooper-Jacob method are 251.71 m2/day and 131 m2/day, and chow method are 2 67.87 m2/day and 146.67 m2/day respectively. This work represents a practical and novel approach to the determination of a key hydrogeological parameter for a highly transmissive aquifer. Keywords—.Aquifer constants, Theis method, Cooper-Jacob method, Chow method, Okija

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