Groundwater Hydrodynamics of an Eastern Africa Coastal Aquifer, In Cluding La Niña 2016–17 Drought

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dc.contributor.authorFerrer, Núria
dc.contributor.authorFolch, Albert
dc.contributor.authorLane, Mike
dc.contributor.authorOlago, Daniel
dc.contributor.authorOdida, Julius
dc.contributor.authorCustodio, Emilio
dc.date.accessioned2023-02-28T10:43:15Z
dc.date.available2023-02-28T10:43:15Z
dc.date.issued2019
dc.description.abstractIn 2016–17 much of East Africa was affected by a severe drought which has been attributed to Indian Ocean Dipole and El Niño Southern Oscillation conditions. Extreme events such as this have immediate and knock-on effects on water availability for household, agricultural and industrial use. Groundwater resources can provide a buffer in times of drought, but may themselves be stressed by reduced recharge and increased usage, posing significant challenges to groundwater resource management. In the context of East Africa, groundwater management is also hampered by a lack of information on aquifer characteristics. With the aim of addressing this knowledge gap, this study shows the hydrogeological behaviour before and during La Niña 2016/17 drought in southern coastal Kenya on a groundwater system which sits within a geological structure which is representative of an important portion of the East African coast. Diverse hydrochemical and isotopic campaigns, as well as groundwater head variation measurements, were carried out to study the groundwater hydrodynamics and thus characterize the aquifer system under climatic conditions before and during the La Niña event. This information is complemented with an estimation of changes in local recharge since 2012 using local data sets. The main consequence of the drought was a 69% reduction of recharge compared to an average climatic year. There was reduced recharge during the first rainy season (April–June) and no recharge during the second wet season (October–December). There was a concurrent increase in seawater intrusion even during the wet season.en_US
dc.identifier.citationFerrer, N., Folch, A., Lane, M., Olago, D., Odida, J., & Custodio, E. (2019). Groundwater hydrodynamics of an Eastern Africa coastal aquifer, including La Niña 2016–17 drought. Science of the total environment, 661, 575-597.https://doi.org/10.1016/j.scitotenv.2019.01.198en_US
dc.identifier.issn0048-9697
dc.identifier.urihttps://nru.uncst.go.ug/handle/123456789/8018
dc.language.isoenen_US
dc.publisherScience of the total environmenten_US
dc.subjectAquiferen_US
dc.subjectRechargeen_US
dc.subjectSaline intrusionen_US
dc.subjectHydrochemistryen_US
dc.subjectIsotopesen_US
dc.titleGroundwater Hydrodynamics of an Eastern Africa Coastal Aquifer, In Cluding La Niña 2016–17 Droughten_US
dc.typeArticleen_US
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