Assessment of climate change impacts on the hydrological response of a watershed in the savanna region of sub-Saharan Africa

Animashaun, Murtala Iyanda; Oguntunde, Philip G.; Olubanjo, O. O.; Akinwumiju, Akinola S.

doi:10.1007/s00704-023-04372-w

Cited by 4 publications

(1 citation statement)

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“…During the drier years, it can be as low as 500 mm [16,22]. Mean daily temperatures can reach 32 o C. During the wet season, the relative humidity is very high (>60%) and declines significantly over the dry season [23].…”

Section: Location and Climatementioning

confidence: 99%

Application of Geochemical Modelling and Multiple Regression Analysis to Reassess Groundwater Evolution in Kaduna Basin, NW Nigeria

Wali,

Alias,

Harun

et al. 2024

Preprint

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This review reassesses groundwater's hydrochemical evolution in the Kaduna Basin using geochemical modelling (GM) and multiple regression analysis (MRA). Hydrochemical data were obtained from the literature using a systematic approach and were subjected to GM and MRA. The geochemical modelling results showed that aquifers are saturated with Anhydrite, Chlorite, Chrysotile, Dolomite, Gypsum, Halite, K-Mica, Pyrite, Quartz, Dolomite, and Goethite. The Na2O-Al2O3-SiO2-H2O system indicated that the studied locations fell in Na-montmorillonite and Kalinite fields. However, the K2OAl2O3-SiO2-H2O system showed that groundwater is stable with Montmorillonite, Kaolinite, and K-Feldspar. MRA and Na+/Cl- molar ratio revealed that rock weathering significantly controls groundwater. The Na+/Cl- values are above 1 in 83.33%, 54.84%, and 26.27% sampling locations in the Kudenda-Nassarawa area, Kaduna South, and Kakuri and its Environs, respectively. The overall p-value was less than 0.01 and R-Sq = 63%, suggesting that all elements significantly influence aquifers' hydrochemistry. Results of geochemical modelling, Na+/Cl- molar ratio, and MRA are concurrent as they both show silicate weathering as the factor controlling groundwater hydrochemistry. Thus, geochemical and multiple regression analysis offers a reliable and user-friendly tool for assessing aquifers' hydrochemistry. We hope this review's findings will stimulate other researchers to an analogous procedure in a forthcoming study on hydrochemical analysis, especially those from semi-arid environments.

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Section: Location and Climatementioning

confidence: 99%