Title: Reliability analysis of hydraulic structures considering unit hydrograph uncertainty
Authors: Zhao, B
Tung, YK
Yeh, KC
Yang, JC
Department of Civil Engineering
Keywords: unit hydrograph;uncertainty analysis;linearly constrained Monte-Carlo simulation;reliability analysis
Issue Date: 1-Feb-1997
Abstract: Unit hydrographs (UHs), along with design rainfalls, are frequently used to determine the discharge hydrograph for design and evaluation of hydraulic structures. Due to the presence of various uncertainties in its derivation, the resulting UH is inevitably subject to uncertainty. Consequently, the performance of hydraulic structures under the design storm condition is uncertain. This paper integrates the linearly constrained Monte-Carlo simulation with the UH theory and routing techniques to evaluate the reliability of hydraulic structures. The linear constraint is considered because the water volume of each generated design direct runoff hydrograph should be equal to that of the design effective rainfall hyetograph or the water volume of each generated UH must be equal to one inch (or cm) over the watershed. For illustration, the proposed methodology is applied tb evaluate the overtopping risk of a hypothetical flood detention reservoir downstream of Tong-Tou watershed in Taiwan.
URI: http://hdl.handle.net/11536/770
ISSN: 0931-1955
Volume: 11
Issue: 1
Begin Page: 33
End Page: 50
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  1. A1997WJ47900003.pdf