Performance of Twelve Mass Transfer Based Reference Evapotranspiration Models under Humid Climate

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dc.contributor.authorDjaman, Koffi
dc.contributor.authorKoudahe, Komlan
dc.contributor.authorSall, Mamadou
dc.contributor.authorKabenge, Isa
dc.contributor.authorRudnick, Daran
dc.date.accessioned2022-11-16T20:18:02Z
dc.date.available2022-11-16T20:18:02Z
dc.date.issued2017
dc.description.abstractReference evapotranspiration is very important parameter in the hydrological, agricultural and environmental studies and is accurately estimated by the FAO Penman-Monteith equation (FAO-PM) under different climatic conditions. However, due to data requirement of the FAO-PM equation, there is a need to investigate the applicability of alternative ETo equations under limited data. The objectives of this study were to evaluate twelve mass transfer based reference evapotranspiration equations and determine the impact of ETo equation on long term water management sustainability in Tanzania and Kenya. The results showed that the Albrecht, Brockamp-Wenner, Dalto, Meyer, Rohwer and Oudin ETo equations systematically overestimated the daily ETo at all weather stations with relative errors that varied from 34% to 94% relative to the FAO-PM ETo estimates. The Penman, Mahringer, Trabert, and the Romanenko equations performed best across Tanzania and the South Western Kenya with root mean squared errors ranging from 0.98 to 1.48 mm/day, which are relatively high and mean bias error (MBE) varying from −0.33 to 0.02 mm/day and the absolute mean error (AME) from 0.79 to 1.16 mm/day. For sustainable water management, the Trabert equation could be adopted at Songea, the Mahringer equation at Tabora, the Dalton and/or the Rohwer equations at Eldoret, the Romanenko equation at Dodoma, Songea and Eldoret. However, regional calibration of the most performing equation could improve water management at regional level.en_US
dc.identifier.citationDjaman, K., Koudahe, K., Sall, M., Kabenge, I., Rudnick, D. and Irmak, S. (2017) Performance of Twelve Mass Transfer Based Reference Evapotranspiration Models under Humid Climate. Journal of Water Resource and Protection, 9, 1347-1363. https://doi.org/10.4236/jwarp.2017.912086en_US
dc.identifier.govdochttps://doi.org/10.4236/jwarp.2017.912086
dc.identifier.urihttps://nru.uncst.go.ug/handle/123456789/5305
dc.language.isoenen_US
dc.publisherJournal of Water Resource and Protectionen_US
dc.subjectReference Evapotranspirationen_US
dc.subjectMass Transferen_US
dc.subjectEastern Africaen_US
dc.subjectWateren_US
dc.titlePerformance of Twelve Mass Transfer Based Reference Evapotranspiration Models under Humid Climateen_US
dc.typeArticleen_US
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