Insights from electrical resistivity tomography on the hydrogeological interaction between sand dams and the weathered basement aquifer

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dc.contributor.authorRitchie, Hannah
dc.contributor.authorHolman, Ian
dc.contributor.authorNyangoka, Justus
dc.contributor.authorBauman, Paul
dc.contributor.authorParker, Alison
dc.date.accessioned2025-01-10T14:16:48Z
dc.date.available2025-01-10T14:16:48Z
dc.date.freetoread2025-01-10
dc.date.issued2024-11-01
dc.date.pubOnline2024-10-30
dc.descriptionData supporting this study are openly available in the Cranfield University repository (CORD) at https://dspace.lib.cranfield.ac.uk/handle/1826/20712.
dc.description.abstractSand dams, composed of recent alluvial aquifers behind concrete dam walls, are a water management technique in drylands. However, their level of hydraulic connectivity with their surrounding weathered basement aquifer is debated. This study aims to constrain this hydrogeological uncertainty in order to better understand their ability to meet water needs and improve dryland water security. The study is the first to use 2D geophysics (Electrical Resistivity Tomography) to provide evidence of seepage from sand dams at three mature and three newly built sites. A generally greater hydraulic connectivity was found between sand dams and their surrounding aquifer than has been assumed in some previous studies, with sites providing at least some local recharge rather than existing as isolated storage structures. This improved understanding is beneficial for both site selection and the performance of sand dams and can help ensure that maximum benefits are derived from the construction of a sand dam depending on its intended purpose.
dc.description.journalNameJournal of Applied Geophysics
dc.description.sponsorshipEngineering and Physical Sciences Research Council
dc.description.sponsorshipThis work was funded by Engineering and Physical Sciences Research Council (Grant No: EP/S022066/1).
dc.identifier.citationRitchie H, Holman I, Nyangoka J, et al., (2024) Insights from electrical resistivity tomography on the hydrogeological interaction between sand dams and the weathered basement aquifer. Journal of Applied Geophysics, Volume 230, November 2024, Article number 105542en_UK
dc.identifier.eissn1879-1859
dc.identifier.elementsID555617
dc.identifier.issn0926-9851
dc.identifier.paperNo105542
dc.identifier.urihttps://doi.org/10.1016/j.jappgeo.2024.105542
dc.identifier.urihttps://dspace.lib.cranfield.ac.uk/handle/1826/23360
dc.identifier.volumeNo230
dc.languageEnglish
dc.language.isoen
dc.publisherElsevieren_UK
dc.publisher.urihttps://www.sciencedirect.com/science/article/pii/S0926985124002581?via%3Dihub
dc.relation.isreferencedbyhttps://dspace.lib.cranfield.ac.uk/handle/1826/20712
dc.rightsAttribution 4.0 Internationalen
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.subjectGeophysicsen_UK
dc.subjectAlluvial aquiferen_UK
dc.subjectKenyaen_UK
dc.subjectDrylandsen_UK
dc.subjectManaged aquifer rechargeen_UK
dc.subject3707 Hydrologyen_UK
dc.subject37 Earth Sciencesen_UK
dc.subject3705 Geologyen_UK
dc.subject6 Clean Water and Sanitationen_UK
dc.subjectGeochemistry & Geophysicsen_UK
dc.subject3704 Geoinformaticsen_UK
dc.subject4104 Environmental managementen_UK
dc.titleInsights from electrical resistivity tomography on the hydrogeological interaction between sand dams and the weathered basement aquiferen_UK
dc.typeArticle
dc.type.subtypeJournal Article
dcterms.dateAccepted2024-10-13

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