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Estimation of Flood Design Hydrographs Using Bivariate Analysis (Copula) and Distributed Hydrological Modelling : Volume 2, Issue 1 (02/01/2014)

By Candela, A.

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Book Id: WPLBN0004019160
Format Type: PDF Article :
File Size: Pages 53
Reproduction Date: 2015

Title: Estimation of Flood Design Hydrographs Using Bivariate Analysis (Copula) and Distributed Hydrological Modelling : Volume 2, Issue 1 (02/01/2014)  
Author: Candela, A.
Volume: Vol. 2, Issue 1
Language: English
Subject: Science, Natural, Hazards
Collections: Periodicals: Journal and Magazine Collection, Copernicus GmbH
Publication Date:
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications


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Aronica, G. T., Brigandí, G., & Candela, A. (2014). Estimation of Flood Design Hydrographs Using Bivariate Analysis (Copula) and Distributed Hydrological Modelling : Volume 2, Issue 1 (02/01/2014). Retrieved from

Description: University of Palermo, Dipartimento di Ingegneria Civile, Ambientale, Aerospaziale e dei Materiali, Palermo, Italy. In this paper a procedure to derive Flood Design Hydrographs (FDH) using a bivariate representation of rainfall forcing (rainfall duration and intensity) using copulas, which describe and model the correlation between these two variables independently of the marginal laws involved, coupled with a distributed rainfall-runoff model is presented. Rainfall-runoff modelling for estimating the hydrological response at the outlet of a watershed used a conceptual fully distributed procedure based on the soil conservation service – curve number method as excess rainfall model and a distributed unit hydrograph with climatic dependencies for the flow routing. Travel time computation, based on the definition of a distributed unit hydrograph, has been performed, implementing a procedure using flow paths determined from a digital elevation model (DEM) and roughness parameters obtained from distributed geographical information. In order to estimate the return period of the FDH which give the probability of occurrence of a hydrograph flood peaks and flow volumes obtained through R-R modeling has been statistically treated via copulas. The shape of hydrograph has been generated on the basis of a modeled flood events, via cluster analysis. The procedure described above was applied to a case study of Imera catchment in Sicily, Italy. The methodology allows a reliable and estimation of the Design Flood Hydrograph and can be used for all the flood risk applications, i.e. evaluation, management, mitigation, etc.

Estimation of flood design hydrographs using bivariate analysis (copula) and distributed hydrological modelling

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