Mon Oct 13, F. Flechtner
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Walczuk, André, Campos, José Eloi Guimarães, and Azevedo, Júlio Henrichs de, 2025. Fractured and porous aquifer recharge in semiarid regions and the relevance of soil covers: A review for Caetité area, Bahia, Brazil. Journal of South American Earth Sciences, 159:105525, doi:10.1016/j.jsames.2025.105525.
• from the NASA Astrophysics Data System • by the DOI System •
@ARTICLE{2025JSAES.15905525W,
author = {{Walczuk}, Andr{\'e} and {Campos}, Jos{\'e} Eloi Guimar{\~a}es and {Azevedo}, J{\'u}lio Henrichs de},
title = "{Fractured and porous aquifer recharge in semiarid regions and the relevance of soil covers: A review for Caetit{\'e} area, Bahia, Brazil}",
journal = {Journal of South American Earth Sciences},
keywords = {Semiarid climate, Fractured aquifer, Soil, GRACE},
year = 2025,
month = jun,
volume = {159},
eid = {105525},
pages = {105525},
abstract = "{Groundwater is a valuable natural resource in areas susceptible to arid
and semiarid climates. In this research, the phreatic surface
dynamics of shallow fractured and porous aquifers of
Caetit{\'e}, state of Bahia, Central Brazil, was investigated.
Water level position was assessed by GRACE satellite data and 28
monitoring wells for the period from 2003 to 2024. Phreatic
surface trends for all datasets are coherent to rainfall
patterns described by precipitation moving averages and the
Standardized Precipitation Index (SPI), respectively. The use of
GRACE, however, is best applicable to soil hosted aquifers
rather than to fractured systems. Recharge estimations
considered the Water Table Fluctuation RISE methodology and vary
depending on aquifer type. The annual storage variations
obtained based on satellite and instruments installed in porous
media (weathered rock and soil) suggests that 19{\textendash}27
\% of the year rainfall (130{\textendash}177 mm/year) are
annually converted into effective recharge. In systems composed
solely of fresh fractured rocks rates drop to 3 \% (24 mm/year).
A relevant finding is the two-way effects of soil thickness in
the recharge process. While pedon favors recharge on wetter
conditions, it may diminish or equate annual storage variations
to settings where no or thin soil covers are present. Data
corroborates that aquifer recharge under semiarid conditions are
sensitive to minor precipitation variations. Finally, it is
proposed that geological setting must be considered when
evaluating climate change impacts on groundwater, as
infiltration is impacted by precipitation, evapotranspiration,
and physiographical properties (relief pattern, geology, soil
type and climate).}",
doi = {10.1016/j.jsames.2025.105525},
adsurl = {https://ui.adsabs.harvard.edu/abs/2025JSAES.15905525W},
adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}
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