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|Title: ||Groundwater Risk Assessment for Shallow Aquifers within the Atankwidi Basin of (Ghana)|
|Authors: ||Anim-Gyampo, Maxwell|
Anornu, Geoffrey K.
Agodzo, Sampson K.
Groundwater risk assessment
|Issue Date: ||2019|
|Publisher: ||Advances in Science, Technology & Innovation|
|Citation: ||Advances in Science, Technology & Innovation, https://doi.org/10.1007/978-3-030-01572-5_67|
|Abstract: ||This study reveals the potential risk to the quality of
shallow groundwater aquifers from the application of
agro-chemicals in upscaling crop production to ensure
food security within the Atankwidi basin of Ghana, using
the combination of DRASTIC and Arc GIS methods.
The DRASTIC indices ranged from 41 to 117, representing
the lowest to highest vulnerable areas. 34.4, 93.3
and 63.9 km2 representing 20, 48.8 and 33.2% of the area
had low, moderate and high vulnerabilities with indices
ranging between 41–71, 71–88 and 88–117, respectively.
The moderate and high vulnerable areas, which constituted
approximately 80% of the area, were underlain by
clay-loam and sandy-loam soils, respectively, where
major farming takes place. The most vulnerable areas
were in the highest elevated areas (recharge), with the
shallowest depth to water-table and the highest permeability
values. Sensitivity analysis using a map removal
approach revealed influential parameters in the order of
Hydraulic conductivity (C) ˃ Soil type (S) ˃ Depth to
water table (D) ˃ Net Recharge (R) ˃ Influence of vadose
zone (I) ˃ Topography (T) ˃ Aquifer material (A). The
validation of the model using heavy metals measured in
shallow aquifers showed the highest values within the
most vulnerable areas and the lowest values in the least
|Description: ||An article published in Advances in Science, Technology & Innovation, 2019; https://doi.org/10.1007/978-3-030-01572-5_67|
|Appears in Collections:||College of Engineering|
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