Estimating peak runoff in small catchments
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The estimation of peak discharge due to rainfall-runoff is a fundamental part of the design of hydraulic structures in small catchments. Models such as WBNM, RORB and RAFTS are generally used as deterministic models of the processes taking place during individual rainfall-runoff events. A more direct statistical approach is often adopted in small catchments, in which a statistical model of the catchment such as the Rational Method, is used to link the statistical rainfall relationship at the site with a statistically based runoff relationship. This paper describes a design procedure in which distributed storage rainfall-runoff models can be effectively incorporated within the statistical modelling approach, using a fully advanced storm pattern. With the adoption of a suitable proportional loss rate and storage discharge coefficient, the procedure becomes a suitable model for linking the statistical rainfall relationship at a site with the statistical runoff relationship. The procedure has been tested on 47 small gauged catchments in Queensland.
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|Item Type:||Conference Paper|
|Additional Information:||Self-archiving of the author-version is not yet supported by this publisher. For more information, please refer to the publisher's website (see hypertext link) or contact the author.|
|Keywords:||runoff forecasting, statistical models, risk analysis, rainfall, runoff modelling, numerical models|
|Subjects:||Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > CIVIL ENGINEERING (090500) > Water Quality Engineering (090508)|
|Divisions:||Past > QUT Faculties & Divisions > Faculty of Built Environment and Engineering|
Current > QUT Faculties and Divisions > Science & Engineering Faculty
|Copyright Owner:||Copyright 2002 Engineers Australia|
|Deposited On:||25 May 2006|
|Last Modified:||21 May 2012 08:47|
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