Design Hyetograph for Typhoon Rainstorms in Taiwan
Publication: Journal of Hydrologic Engineering
Volume 13, Issue 7
Abstract
The design flood can be determined by transposing the design storm observed in the region surrounding the project and converting the storm to flow by use of a simple rainfall-runoff relation or a watershed runoff model. In this study, a design hyetograph in a double-triangular shape of duration was derived from rainfall intensity–duration–frequency curve to represent the time distribution of severe typhoon rainstorms. The design floods generated by performing a rainfall-runoff model using design hyetographs as inputs were verified using the flow records from 17 watersheds in Taiwan. The result indicated that the generated design discharge using the proposed hyetograph for specified return periods were close to the discharge obtained from frequency analysis using flow records. The proposed design hyetograph can be applied to areas that are usually threatened by typhoon rainstorms.
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© 2008 ASCE.
History
Received: Apr 24, 2006
Accepted: Aug 7, 2007
Published online: Jul 1, 2008
Published in print: Jul 2008
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