Spatial distribution of runoff in ungauged catchments in Tanzania

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dc.contributor.authorMdee, Ombeni J.
dc.date.accessioned2020-03-19T09:00:13Z
dc.date.available2020-03-19T09:00:13Z
dc.date.issued2015
dc.descriptionFull Text Article. Also available at: https://www.ewra.net/wuj/pdf/WUJ_2015_09_06.pdfen_US
dc.description.abstractThis paper presents a preliminary map of average annual runoff of Tanzania using a conceptual rainfall runoff model to predict the amount of water directed to base flow of the rivers with the application of Geographic Information System (GIS). Average annual runoff is a fundamental hydrological variable which serves many purposes in hydrological research particularly in stream flow estimation for hydropower plant allocation and development. Still the runoff data can serve during irrigation and flood control situation. The Pacific Southwest Inter-Agency Committee (PSIAC) model was utilized to rate the surface geology, soil-infiltration rate, topography, ground cover, land use, upland and channel erosions parameters which have been applied to estimate the Curve Number (CN). Subsequently, CN and rainfall data have been employed in the Soil Conservation Service (SCS) runoff equation to estimate the direct runoff data. The results of the study show the combination of PSIAC and SCS models were useful in studying of runoff response of the Tanzania’s catchments. Once the preliminary runoff map was evaluated depends on the three climate zones of Tanzania indicated to have high annual runoff in wet zone compared with moderate and dry zones. The runoff map can be applied during preliminary study, however the author acknowledged the primary source of data for the average annual runoff estimation is preferable to be taken at the gauged river flow stations.en_US
dc.identifier.citationMdee, O. J. (2015). Spatial distribution of runoff in ungauged catchments in Tanzania. Water Utility Journal, 9, 61-70.en_US
dc.identifier.issn1792-748X
dc.identifier.urihttp://hdl.handle.net/20.500.12661/2199
dc.language.isoenen_US
dc.publisherE.W. Publicationsen_US
dc.subjectSoil conservation serviceen_US
dc.subjectPSIAC modelen_US
dc.subjectRunoffen_US
dc.subjectRiveren_US
dc.subjectGeographic Information Systemen_US
dc.subjectGISen_US
dc.subjectWateren_US
dc.subjectPacific Southwest Inter-Agency Committeeen_US
dc.subjectRunoff modelen_US
dc.subjectHydropower plantsen_US
dc.subjectUngauged catchmentsen_US
dc.titleSpatial distribution of runoff in ungauged catchments in Tanzaniaen_US
dc.typeArticleen_US
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