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An improved and consistent approach to estimate catchment response time parameters: case study in the C5 drainage region, South Africa

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dc.contributor.author Gericke, O.J.
dc.contributor.author Smithers, J.C.
dc.date.accessioned 2018-08-16T08:28:25Z
dc.date.available 2018-08-16T08:28:25Z
dc.date.issued 2018
dc.identifier.issn 1753-318X
dc.identifier.issn 1753-318X
dc.identifier.uri http://hdl.handle.net/11462/1504
dc.description Published Article en_US
dc.description.abstract Large errors in estimates of peak discharge in medium to large catchments in South Africa can be largely ascribed to significant errors in the estimation of the catchment response time, mainly as a consequence of the use of inappropriate time variables, the inadequate use of a simplified convolution process between rainfall–run-off time variables, and the lack of locally developed empirical methods to estimate catchment response time parameters. Furthermore, the use of a typical convolution process between a single hyetograph and hydrograph to estimate observed time parameters at large catchment scales is regarded as not practical, as such simplification is not applicable in real, large heterogeneous catchments where antecedent moisture from previous rainfall events and spatially non-uniform rainfall hyetographs can result in multipeaked hydrographs. This paper presents the development and evaluation of an alternative, improved and consistent approach to estimate catchment response time expressed as the time to peak (TP) in the C5 secondary drainage region in South Africa, while the interrelationship, similarity and proportionality ratios between TP and the conceptual time of concentration (TC) and lag time (TL) are also investigated. en_US
dc.format.extent 560 480 bytes, 1 file
dc.format.mimetype Application/PDF
dc.language.iso en_US en_US
dc.publisher Journal of Flood Risk Management en_US
dc.subject Base flow en_US
dc.subject direct run-off en_US
dc.subject lag time en_US
dc.subject time of concentration en_US
dc.subject time to peak en_US
dc.title An improved and consistent approach to estimate catchment response time parameters: case study in the C5 drainage region, South Africa en_US
dc.type Article en_US


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