Beyond dams: assessing integrated water storage in the Shashe Catchment, Limpopo River Basin

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cg.contributor.affiliationInternational Water Management Instituteen_US
cg.contributor.affiliationZimbabwe National Water Authorityen_US
cg.contributor.affiliationUniversity of Botswanaen_US
cg.contributor.donorCGIAR Trust Funden_US
cg.contributor.initiativeNEXUS Gainsen_US
cg.coverage.countryBotswanaen_US
cg.coverage.countryZimbabween_US
cg.coverage.iso3166-alpha2BWen_US
cg.coverage.iso3166-alpha2ZWen_US
cg.coverage.regionSouthern Africaen_US
cg.coverage.regionEastern Africaen_US
cg.coverage.subregionLimpopo River Basinen_US
cg.coverage.subregionShashe Catchmenten_US
cg.creator.identifierGirma Yimer Ebrhaim: 0000-0002-4695-1034en_US
cg.creator.identifierJonathan Lautze: 0000-0003-4215-5919en_US
cg.creator.identifierMatthew McCartney: 0000-0001-6342-2815en_US
cg.creator.identifierkarthikeyan matheswaran: 0000-0001-7377-0629en_US
cg.identifier.doihttps://doi.org/10.1016/j.ejrh.2024.101913en_US
cg.identifier.iwmilibraryH053004en_US
cg.isijournalISI Journalen_US
cg.issn2214-5818en_US
cg.journalJournal of Hydrology: Regional Studiesen_US
cg.reviewStatusPeer Reviewen_US
cg.river.basinLIMPOPOen_US
cg.volume55en_US
dc.contributor.authorEbrahim, Girma Y.en_US
dc.contributor.authorLautze, Jonathan F.en_US
dc.contributor.authorMcCartney, Matthewen_US
dc.contributor.authorMatheswaran, Karthikeyanen_US
dc.contributor.authorNyikadzino, B.en_US
dc.contributor.authorTafesse, N. T.en_US
dc.date.accessioned2024-08-27T13:36:32Zen_US
dc.date.available2024-08-27T13:36:32Zen_US
dc.identifier.urihttps://hdl.handle.net/10568/151875en_US
dc.titleBeyond dams: assessing integrated water storage in the Shashe Catchment, Limpopo River Basinen_US
dcterms.abstractStudy region: The Shashe catchment, Limpopo River Basin, Botswana, and Zimbabwe. Study focus: The Shashe catchment is the third largest flow contributor to the Limpopo River Basin. Water availability in the Shashe catchment is highly seasonal due to high seasonal rainfall variability. The seasonality and inter-annual variability cause shortfalls (demand exceeds the average water availability) in certain months and years. Storage is needed to bridge the seasonal water availability “gap” and mitigate the deficits in drought years, i.e., inter-annual variability. While the need for water storage through grey infrastructure such as dams has long been known, there is growing recognition of the need for approaches to water storage that capitalize on all storage types. However, the current capacity to plan in ways that utilize all storage types is limited. The analyses conducted for this paper assessed the volume and spatial and temporal variability of different storage options – large and small dams, sand dams, soil moisture, and aquifers – in the Shashe catchment of the Limpopo River Basin. An integrated SWAT-MODFLOW model and remote sensing approach were developed for 2015–2020. New hydrological insights for the region: The total annual water storage in the Shashe catchment is approximately 44,000 Mm3 , dominated by groundwater. The annual storage is about 42,000 Mm3 in aquifers, 1500 Mm3 in soil, 700 Mm3 in large dam reservoirs, 45 Mm3 in small dams/ponds, and 0.13 Mm3 in sand dams. There is high seasonality in water storage availability. Soil moisture storage is at its maximum from January to March and lowest from July to September. Dam storage is at its maximum from March to May, and the water storage is relatively stable throughout the year. Aquifer storage is relatively stable during the dry seasons compared to other storage options. Optimizing water use considering the seasonal variation in different storage types could improve water availability and climate resilience.en_US
dcterms.accessRightsOpen Accessen_US
dcterms.available2024-08-07en_US
dcterms.bibliographicCitationEbrahim, Girma Y.; Lautze, Jonathan F.; McCartney, Matthew; Matheswaran, Karthikeyan; Nyikadzino, B.; Tafesse, N. T. 2024. Beyond dams: assessing integrated water storage in the Shashe Catchment, Limpopo River Basin. Journal of Hydrology: Regional Studies, 55:101913. [doi: https://doi.org/10.1016/j.ejrh.2024.101913]en_US
dcterms.extent101913.en_US
dcterms.issued2024-10en_US
dcterms.languageenen_US
dcterms.licenseCC-BY-4.0en_US
dcterms.publisherElsevieren_US
dcterms.subjectwater storageen_US
dcterms.subjectriver basinsen_US
dcterms.subjectdamsen_US
dcterms.subjectwater availabilityen_US
dcterms.subjectsoil water contenten_US
dcterms.subjectgroundwateren_US
dcterms.subjectaquifersen_US
dcterms.subjectsurface wateren_US
dcterms.subjectreservoirsen_US
dcterms.subjectrainfall patternsen_US
dcterms.subjecttrendsen_US
dcterms.subjectmodelsen_US
dcterms.typeJournal Articleen_US

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