Validation of the rainfall-runoff SCS-CN model in a catchment with limited measured data in Zimbabwe

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dc.creatorNhamo, Luxon
dc.creatorChilonda, Pius
dc.date2013
dc.date2014-06-13T14:47:09Z
dc.date2014-06-13T14:47:09Z
dc.date.accessioned2026-06-27T18:31:05Z
dc.descriptionAn evaluation of available opportunities to revive irrigation on a long abandoned irrigation scheme in a dry region of Zimbabwe is presented by assessing water availability at catchment level. The aim is to enhance the livelihoods, income and nutrition of the communities that depend on the irrigation scheme through a sustainable management of revitalised irrigation infrastructure and ensure food security. Runoff generated in the catchment, with potential to flow into the dam that supplies water to the scheme, is estimated using the Soil Conservation Service curve number (SCS-CN) model. The model simulates runoff at catchment level using daily rainfall data. An overview of the methodology and the various steps followed are provided. Daily rainfall and dam water levels are the only measured data available for the catchment. The dam water levels are used to determine the dam water volumes using rating tables. The dam water volumes are used to calculate the daily water inflows into the dam and these are compared with simulated water discharge rates obtained from the model. The plotted hydrographs of both simulated and measured values coincided very well in shape with great precision validating the SCS-CN model for simulating runoff in ungauged catchments.
dc.identifierhttps://hdl.handle.net/10568/40200
dc.identifier.urihttp://hdl.handle.net/123456789/158229
dc.languageen
dc.publisherAcademic Journals
dc.rightsOpen Access
dc.sourceNhamo, Luxon; Chilonda, Pius. 2013. Validation of the rainfall-runoff SCS-CN model in a catchment with limited measured data in Zimbabwe. International Journal of Water Resources and Environmental Engineering, 5(6):295-303. doi: https://doi.org/10.5897/IJWREE12.114
dc.subjectrainfall-runoff relationships
dc.subjectsoil conservation
dc.subjectsimulation models
dc.subjectcatchment areas
dc.subjectdams
dc.subjectirrigation schemes
dc.subjectwater availability
dc.subjectwater balance
dc.titleValidation of the rainfall-runoff SCS-CN model in a catchment with limited measured data in Zimbabwe
dc.typeJournal Article

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Instituto Internacional para el Manejo del Agua (IWMI)