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Runoff formation in a small catchment at hillslope and catchment scales

✍ Scribed by Miroslav Hrnčíř; Martin Šanda; Alena Kulasová; Milena Císlerová

Publisher
John Wiley and Sons
Year
2010
Tongue
English
Weight
304 KB
Volume
24
Category
Article
ISSN
0885-6087

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✦ Synopsis

Abstract

The study is focused on runoff formation processes at two scales: the scale of a small mountainous catchment at its outlet and the scale of an experimental plot located in a typical hillslope subregion. The heterogeneous soil profile of the catchments is formed by Cambisols developed on granite bedrocks. The surface runoff appears rarely, the subsurface flow forms a dominant part of the hydrograph. From the period 1998–2008, a set of 44 rainfall–runoff episodes was selected to analyse the rainfall–runoff relationship using multiple regression analysis. From a set of physical parameters, the initial soil water content came out as the statistically significant parameter that controls the runoff forming process at the catchment scale. The rainfall–runoff relationship at the experimental plot scale is more scattered. The dynamic thresholds of rainfall totals apparently control the ratio and the magnitude of stormflow at both scales. Up to the threshold value, the runoff strongly depends on the initial saturation conditions. Above the threshold value, the initial soil moisture conditions are less important. Copyright © 2010 John Wiley & Sons, Ltd.

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