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Review of methods used to estimate catchment response time for the purpose of peak discharge estimation

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dc.contributor.author Gericke, Ockert J.
dc.contributor.author Smithers, Jeff C.
dc.date.accessioned 2018-08-06T07:10:51Z
dc.date.available 2018-08-06T07:10:51Z
dc.date.issued 2014
dc.identifier.issn 0262-6667
dc.identifier.uri http://hdl.handle.net/11462/1439
dc.description Published Article en_US
dc.description.abstract Large errors in peak discharge estimates at catchment scales can be ascribed to errors in the estimation of catchment response time. The time parameters most frequently used to express catchment response time are the time of concentration (TC), lag time (TL) and time to peak (TP). This paper presents a review of the time parameter estimation methods used internationally, with selected comparisons in medium and large catchments in the C5 secondary drainage region in South Africa. The comparison of different time parameter estimation methods with recommended methods used in South Africa confirmed that the application of empirical methods, with no local correction factors, beyond their original developmental regions, must be avoided. The TC is recognized as the most frequently used time parameter, followed by TL. In acknowledging this, as well as the basic assumptions of the approximations TL = 0.6TC and TC ≈ TP, along with the similarity between the definitions of the TP and the conceptual TC, it was evident that the latter two time parameters should be further investigated to develop an alternative approach to estimate representative response times that result in improved estimates of peak discharge at these catchment scales. en_US
dc.format.extent 2 272 457 bytes, 1 file
dc.format.mimetype Application/PDF
dc.language.iso en_US en_US
dc.publisher Hydrological Sciences Journal en_US
dc.subject runoff en_US
dc.subject floods en_US
dc.subject catchment response time en_US
dc.subject time variables en_US
dc.subject time parameters en_US
dc.subject time of concentration en_US
dc.subject lag time en_US
dc.subject time to peak en_US
dc.subject peak discharge en_US
dc.subject South Africa en_US
dc.title Review of methods used to estimate catchment response time for the purpose of peak discharge estimation en_US
dc.type Article en_US

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