Identification of prevailing storm runoff generation mechanisms in an intensively cultivated catchment

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Title:Identification of prevailing storm runoff generation mechanisms in an intensively cultivated catchment
Creators:
Zumr, David; david dot zumr at fsv dot cvut dot cz; Department of Irrigation, Drainage and Landscape Engineering, Faculty of Civil Engineering, Czech Technical University in Prague, Thákurova 7, 16629, Prague 6, Czech Republic.
Dostál, Tomáš; Department of Irrigation, Drainage and Landscape Engineering, Faculty of Civil Engineering, Czech Technical University in Prague, Thákurova 7, 16629, Prague 6, Czech Republic.
Devátý, Jan; Department of Irrigation, Drainage and Landscape Engineering, Faculty of Civil Engineering, Czech Technical University in Prague, Thákurova 7, 16629, Prague 6, Czech Republic.
Journal or Publication Title:
Journal of Hydrology and Hydromechanics, 63, 3, pp. 246-254
Uncontrolled Keywords:shallow subsurface runoff, surface runoff, rainfall-runoff, soil erosion, suspended solids transport, agriculture watershed

Abstract

The fact that flash floods initiated in arable catchments are often accompanied by massive sediment and nutrient loads often leads to the assumption that surface runoff is the principle pathway by which runoff reaches watercourses. On the basis of an evaluation of several rainfall-runoff events in a representative agricultural catchment, we show that runoff from cultivated land may be generated in a way similar to that seen on forested slopes, where shallow subsurface runoff is the predominant pathway by which runoff makes its way to watercourses in most runoff events. To identify the predominant runoff pathway, we employed a combination of turbidity measurements and stream discharge data. Suspended sediment flux, a newly introduced index representing the ratio between precipitation duration and total sediment yield, and direction of the discharge-turbidity hysteresis loops were proposed as reflective indicators of the frequency of runoff via different pathways. In our study, most of the events initiated by rainstorms of various intensities and durations resulted in rapid increases in stream discharge. Although we observed temporal variability of topsoil properties attributable to seasonal weather changes and agricultural activities, e.g. bulk density and porosity, runoff generation was mainly driven by precipitation characteristics and the initial catchment saturation.

Official URL: http://147.213.145.2/vc/vc1.asp

Title:Identification of prevailing storm runoff generation mechanisms in an intensively cultivated catchment
Translated title:Identification of prevailing storm runoff generation mechanisms in an intensively cultivated catchment
Creators:
Zumr, David; david dot zumr at fsv dot cvut dot cz; Department of Irrigation, Drainage and Landscape Engineering, Faculty of Civil Engineering, Czech Technical University in Prague, Thákurova 7, 16629, Prague 6, Czech Republic.
Dostál, Tomáš; Department of Irrigation, Drainage and Landscape Engineering, Faculty of Civil Engineering, Czech Technical University in Prague, Thákurova 7, 16629, Prague 6, Czech Republic.
Devátý, Jan; Department of Irrigation, Drainage and Landscape Engineering, Faculty of Civil Engineering, Czech Technical University in Prague, Thákurova 7, 16629, Prague 6, Czech Republic.
Uncontrolled Keywords:shallow subsurface runoff, surface runoff, rainfall-runoff, soil erosion, suspended solids transport, agriculture watershed
Subjects:T Technology > TA Engineering (General). Civil engineering (General)
Divisions:Mathematics, Physics and Earth Sciences > Institute of Hydrodynamics > Journal of Hydrology and Hydromechanics
Journal or Publication Title:Journal of Hydrology and Hydromechanics
Volume:63
Number:3
Page Range:pp. 246-254
ISSN:0042-790X
Publisher:Institute of Hydrology of the Slovak Academy of Sciences and the Institute of Hydrodynamics of the Academy of Sciences of the Czech Republic
Related URLs:
URLURL Type
http://avi.lib.cas.cz/node/55Publisher
ID Code:8526
Item Type:Article
Deposited On:17 Dec 2015 12:39
Last Modified:17 Dec 2015 11:39

Citation

Zumr, David; Dostál, Tomáš; Devátý, Jan (2015) Identification of prevailing storm runoff generation mechanisms in an intensively cultivated catchment. Journal of Hydrology and Hydromechanics, 63 (3). pp. 246-254. ISSN 0042-790X

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