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Curvature Distribution Within Hillslopes and Catchments and Its Effect on the Hydrological Response : Volume 3, Issue 3 (20/06/2006)

By Bogaart, P. W.

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Book Id: WPLBN0004012523
Format Type: PDF Article :
File Size: Pages 34
Reproduction Date: 2015

Title: Curvature Distribution Within Hillslopes and Catchments and Its Effect on the Hydrological Response : Volume 3, Issue 3 (20/06/2006)  
Author: Bogaart, P. W.
Volume: Vol. 3, Issue 3
Language: English
Subject: Science, Hydrology, Earth
Collections: Periodicals: Journal and Magazine Collection, Copernicus GmbH
Historic
Publication Date:
2006
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

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Troch, P. A., & Bogaart, P. W. (2006). Curvature Distribution Within Hillslopes and Catchments and Its Effect on the Hydrological Response : Volume 3, Issue 3 (20/06/2006). Retrieved from http://ebook.worldlibrary.net/


Description
Description: Hydrology and Quantitative Water Management Group, Wageningen University, The Netherlands. Topographic convergence and divergence are first order controls on the hillslope and catchment hydrological response, as evidenced by similarity parameter analyses. Hydrological models often do not take convergence as measured by contour curvature directly into account; instead they use comparable measures like the topographic index or the hillslope width function. This paper focusses on the question how hillslope width functions and contour curvature are related within the Plynlimon catchments, Wales. It is shown that the total width function of all hillslopes suggest that the catchments are overall divergent, which is in contrast to the perception that catchments should be overall convergent. This so-called convergence paradox is explained by the effect of skewed curvature distributions and extreme curvatures near the channel network. The hillslope-storage Boussinesq (hsB) model is used to asses the effect of within-hillslope convergence variability on the hydrological response. It is concluded that this effect is small, even when the soil saturation threshold is exceeded. Also described in this paper is a novel algorithm to compute flow path lengths on hillslopes towards the drainage network, using the multiple-flow-direction method.

Summary
Curvature distribution within hillslopes and catchments and its effect on the hydrological response

 

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