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| Created: | Feb 08, 2023 at 9:09 p.m. | |
| Last updated: | Feb 08, 2023 at 9:09 p.m. | |
| Citation: | See how to cite this resource |
| Sharing Status: | Public |
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Abstract
A conceptual groundwater flow model was developed for the crystalline aquifers in southeastern part of the Eastern region, Ghana. The objective was to determine approximate levels of groundwater recharge, estimate aquifer hydraulic parameters, and then test various scenarios of groundwater extraction under the current conditions of recharge. A steady state groundwater flow model has been calibrated against measured water levels of 19 wells in the area. The resulting recharge is estimated to range from 8.97 x 10(-5) m/d to 7.14 x 10(-4) m/d resulting in a basin wide average recharge of about 9.6% of total annual precipitation, which results in a basin wide quantitative recharge of about 2.4 million m(3)/d in the area. This compares to recharge estimated from the chloride mass balance of 7.6% of precipitation determined in this study. The general groundwater flow in the area has also been determined to conform to the general northeast-southwest structural grain of the country. The implication is that the general hydrogeology is controlled by post genetic structural entities imposed on the rocks to create ingresses for sufficient groundwater storage and transport. Calibrated aquifer hydraulic conductivities range between 0.99 m/d and over 19.4 m/d. There is a significant contribution of groundwater discharge to stream flow in the study area. Increasing groundwater extraction will have an effect on stream flow. This study finds that the current groundwater extraction levels represent only 0.17% of the annual recharge from precipitation, and that groundwater can sustain future increased groundwater demands from population growth and industrialization. (C) 2010 Elsevier Ltd. All rights reserved.
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Additional Metadata
| Name | Value |
|---|---|
| DOI | 10.1016/j.jafrearsci.2010.10.005 |
| Depth | |
| Scale | 1 001 - 10 000 km² |
| Layers | 1 |
| Purpose | Groundwater resources |
| GroMoPo_ID | 434 |
| IsVerified | True |
| Model Code | MODFLOW |
| Model Link | https://doi.org/10.1016/j.jafrearsci.2010.10.005 |
| Model Time | SS |
| Model Year | 2011 |
| Model Authors | Yidana, SM; Ganyaglo, S; Banoeng-Yakubo, B; Akabzaa, T |
| Model Country | Ghana |
| Data Available | Report/paper only |
| Developer Email | smyidana@ug.edu.gh |
| Dominant Geology | Model focuses on multiple geologic materials |
| Developer Country | Ghana |
| Publication Title | A conceptual framework of groundwater flow in some crystalline aquifers in Southeastern Ghana |
| Original Developer | No |
| Additional Information | |
| Integration or Coupling | None of the above |
| Evaluation or Calibration | Static water levels |
| Geologic Data Availability | No |
How to Cite
This resource is shared under the Creative Commons Attribution CC BY.
http://creativecommons.org/licenses/by/4.0/
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