Effects of non-linearity in storage-discharge relationships on design flood estimates
(2001) Effects of non-linearity in storage-discharge relationships on design flood estimates. In Proceedings MODSIM 2001 International Congress on Modelling and Simulation, pages pp. 113-117, Australian National University, Canberra, Australia.
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Abstract
Rainfall-based flood estimation techniques are commonly adopted in hydrological design. Runoff routing models are widely used in Australia, which use either a linear or nonlinear storage-discharge relationship. Australian Rainfall and Runoff recommends the use of a nonlinear storage-discharge relationship; though, many have proposed other types of storage-discharge relationships. This paper adopts a Monte Carlo simulation technique to examine the effects of nonlinearity in storage-discharge relationship on design flood estimates. This simulates thousands of rainfall events, which are then routed through a runoff routing model to generate streamflow hydrographs. The nonlinearity parameter in the storage discharge relationship is varied to quantify its effects on design flood estimates. It is found that nonlinearity parameter has significant effect on design floods, particularly for larger floods. Results from three study catchments indicate that a nonlinear storage-discharge relationship is preferable to linear relationship.
| Item Type: | Conference Paper |
|---|---|
| Status: | Published |
| Keywords: | Runoff routing; Storage-discharge relationship; Flood estimation; Design floods |
| Subjects: | 290000 Engineering and Technology > 290800 Civil Engineering > 290802 Water and Sanitary Engineering 290000 Engineering and Technology > 291100 Environmental Engineering > 291101 Environmental Engineering Modelling 290000 Engineering and Technology > 291100 Environmental Engineering > 291103 Environmental Engineering Design |
| ID Code: | 4331 |
| Deposited By: | Goonetilleke, Ashantha |
| Deposited On: | 30 May 2006 |
| Alternative Locations: | http://www.mssanz.org.au/ |
| Copyright Owner: | Copyright 2001 (please consult author) |