<abstract xml:lang="en" xmlns="http://www.w3.org/1999/xhtml"><p>To reveal and evaluate the mechanism of transforming rainfall into runoff in the region, where the subsurface flow plays a dominant role in the runoff formation, a continuous hydrological and climatic data monitoring has been set-up in the experimental catchment Uhlířská (the Jizera Mountains, CR). The soil profile (Dystric Cambisol), formed on the weathered granite bedrock, is shallow and highly heterogeneous. Beside a standard catchment data observation a hillslope transect was instrumented to control the flow dynamics in the soil profile. From three soil horizons, the subsurface outflow is recorded in the subsurface trench. Adjacent to the trench the soil water suction is scanned by triplets of automatic tensiometers. Within the soil profile the unsaturated regime prevails, nevertheless the soil keeps almost saturated. Nearly simultaneous reaction of suction on a rainfall in all soil horizons implies a rapid vertical flow. Local preferential flow paths are conducting infiltrating water at significantly variable rates when saturation is reached. Groundwater table, soil moisture and subsurface runoff measured at the hillslope transect and the total outflow from the catchment, are correlated. The outflow from the catchment is dominantly controlled by soil moisture however the mechanism of its generation is not yet fully understood.</p></abstract>

To reveal and evaluate the mechanism of transforming rainfall into runoff in the region, where the subsurface flow plays a dominant role in the runoff formation, a continuous hydrological and climatic data monitoring has been set-up in the experimental catchment Uhlířská (the Jizera Mountains, CR). The soil profile (Dystric Cambisol), formed on the weathered granite bedrock, is shallow and highly heterogeneous. Beside a standard catchment data observation a hillslope transect was instrumented to control the flow dynamics in the soil profile. From three soil horizons, the subsurface outflow is recorded in the subsurface trench. Adjacent to the trench the soil water suction is scanned by triplets of automatic tensiometers. Within the soil profile the unsaturated regime prevails, nevertheless the soil keeps almost saturated. Nearly simultaneous reaction of suction on a rainfall in all soil horizons implies a rapid vertical flow. Local preferential flow paths are conducting infiltrating water at significantly variable rates when saturation is reached. Groundwater table, soil moisture and subsurface runoff measured at the hillslope transect and the total outflow from the catchment, are correlated. The outflow from the catchment is dominantly controlled by soil moisture however the mechanism of its generation is not yet fully understood.

Transforming Hydrographs in the Hillslope Subsurface

Faculty of Civil Engineering, Czech Technical University in Prague, Thákurova 7, 166 29 Prague 6, Czech Republic

Journal of Hydrology and Hydromechanics

{"article-title":"Transforming Hydrographs in the Hillslope Subsurface"}

To reveal and evaluate the mechanism of transforming rainfall into runoff in the region, where the subsurface flow plays a dominant role in the runoff...

Transforming Hydrographs in the Hillslope Subsurface

Online veröffentlicht: 24. Dez. 2009

Seitenbereich: 264 - 275

DOI: https://doi.org/10.2478/v10098-009-0023-z

Schlüsselwörter
experimentální povodí, hydrologické monitorování, podpovrchový příkop, preferenční proudění, půdní vlhkost, dystrická kambizem, krystalické žulové podloží

This content is open access.

Transforming Hydrographs in the Hillslope Subsurface

Online veröffentlicht: 24. Dez. 2009

Seitenbereich: 264 - 275

DOI: https://doi.org/10.2478/v10098-009-0023-z

Schlüsselwörterexperimentální povodí, hydrologické monitorování, podpovrchový příkop, preferenční proudění, půdní vlhkost, dystrická kambizem, krystalické žulové podloží

This content is open access.

Schlüsselwörter
experimentální povodí, hydrologické monitorování, podpovrchový příkop, preferenční proudění, půdní vlhkost, dystrická kambizem, krystalické žulové podloží