TY - JOUR
T1 - Estimation of groundwater recharge in Southern Ghana
AU - Nyarko, Delaiah Antwi
AU - Chegbeleh, Larry Pax
AU - Dzikunoo, Elikplim Abla
AU - Ackom, Edward Kofi
AU - Yidana, Sandow Mark
N1 - Publisher Copyright:
Copyright © 2025 Inderscience Enterprises Ltd.
PY - 2025
Y1 - 2025
N2 - The rainfall infiltration breakthrough (RIB) model has been applied to estimate groundwater recharge over parts of the saprolite aquifer unit in Southern Ghana. This method relies on rainfall and groundwater level data monitored simultaneously over a period, and properties of the aquifer material. The water table fluctuations (WTF) technique was applied independently to validate the results of RIB technique. Both methods were executed based on specific yield (Sy) values in the range of 1%–5%. The results suggest a wide range of variations in groundwater recharge rates over the terrain. Groundwater recharge rates fall in the range of 0.58%–21.36% of annual precipitation based on the RIB. The results indicate that the lag period between rainfall and eventual groundwater recharge ranges between 0 and 9 months, depending on the thickness and content of the unsaturated zone. Estimates of groundwater recharge suggest variably good fortunes for groundwater.
AB - The rainfall infiltration breakthrough (RIB) model has been applied to estimate groundwater recharge over parts of the saprolite aquifer unit in Southern Ghana. This method relies on rainfall and groundwater level data monitored simultaneously over a period, and properties of the aquifer material. The water table fluctuations (WTF) technique was applied independently to validate the results of RIB technique. Both methods were executed based on specific yield (Sy) values in the range of 1%–5%. The results suggest a wide range of variations in groundwater recharge rates over the terrain. Groundwater recharge rates fall in the range of 0.58%–21.36% of annual precipitation based on the RIB. The results indicate that the lag period between rainfall and eventual groundwater recharge ranges between 0 and 9 months, depending on the thickness and content of the unsaturated zone. Estimates of groundwater recharge suggest variably good fortunes for groundwater.
KW - groundwater level fluctuation
KW - groundwater recharge
KW - lag length
KW - lag time
KW - RIB model
KW - saprolite aquifer system
KW - shallow unconfined aquifer
KW - WTF method
UR - http://www.scopus.com/inward/record.url?scp=85215755508&partnerID=8YFLogxK
U2 - 10.1504/IJHST.2025.143107
DO - 10.1504/IJHST.2025.143107
M3 - Article
AN - SCOPUS:85215755508
SN - 2042-7808
VL - 19
SP - 73
EP - 92
JO - International Journal of Hydrology Science and Technology
JF - International Journal of Hydrology Science and Technology
IS - 1
ER -