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A Look at the Links Between Drainage Density and Flood Statistics : Volume 13, Issue 7 (07/07/2009)

By Pallard, B.

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Book Id: WPLBN0003972153
Format Type: PDF Article :
File Size: Pages 11
Reproduction Date: 2015

Title: A Look at the Links Between Drainage Density and Flood Statistics : Volume 13, Issue 7 (07/07/2009)  
Author: Pallard, B.
Volume: Vol. 13, Issue 7
Language: English
Subject: Science, Hydrology, Earth
Collections: Periodicals: Journal and Magazine Collection, Copernicus GmbH
Historic
Publication Date:
2009
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

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Pallard, B., Montanari, A., & Castellarin, A. (2009). A Look at the Links Between Drainage Density and Flood Statistics : Volume 13, Issue 7 (07/07/2009). Retrieved from http://ebook.worldlibrary.net/


Description
Description: International Center for Agricultural Science and Natural resource Management Studies, Montpellier Supagro, Montpellier, France. We investigate the links between the drainage density of a river basin and selected flood statistics, namely, mean, standard deviation, coefficient of variation and coefficient of skewness of annual maximum series of peak flows. The investigation is carried out through a three-stage analysis. First, a numerical simulation is performed by using a spatially distributed hydrological model in order to highlight how flood statistics change with varying drainage density. Second, a conceptual hydrological model is used in order to analytically derive the dependence of flood statistics on drainage density. Third, real world data from 44 watersheds located in northern Italy were analysed. The three-level analysis seems to suggest that a critical value of the drainage density exists for which a minimum is attained in both the coefficient of variation and the absolute value of the skewness coefficient. Such minima in the flood statistics correspond to a minimum of the flood quantile for a given exceedance probability (i.e., recurrence interval). Therefore, the results of this study may provide useful indications for flood risk assessment in ungauged basins.

Summary
A look at the links between drainage density and flood statistics

Excerpt
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