A technique for deriving an average event unit hydrograph from streamflow-only data for ephemeral quick-flow-dominant catchments

Date

2006

Authors

Croke, Barry

Journal Title

Journal ISSN

Volume Title

Publisher

Elsevier

Abstract

A technique is presented for empirical and parametric estimation of an average event unit hydrograph response curve solely from measured streamflow data for use in rainfall-runoff models with a focus on modelling flow for natural resource management. As the technique does not require rainfall data, the unit hydrograph can be derived solely from streamflow data at a temporal resolution appropriate for the response of the catchment. The response curves derived for a number of stations show a power law relationship of decay in flow after peak that can be described using a three-parameter function. The approach is best suited to ephemeral streamflow regimes dominated by surface and near-surface runoff (quick-flow component) where flow events are well-separated and largely independent of each other. Analysis of the derived unit hydrograph for 28 quick-flow-dominated catchments illustrates the range of parameter values obtained in fitting the power law.

Description

Keywords

Keywords: Hydrographic surveys; Mathematical models; Rain; Runoff; Stream flow; Water resources; Rainfall-runoff modelling; Streamflow modelling; Unit hydrograph; Water resource management; Catchments; Catchments; Hydrographic surveys; Mathematical models; Rain; Ru Rainfall-runoff modelling; Streamflow modelling; Unit hydrograph; Water resource management

Citation

Source

Advances in Water Resources

Type

Journal article

Book Title

Entity type

Access Statement

License Rights

DOI

10.1016/j.advwatres.2005.06.005

Restricted until

2037-12-31