Transforming Hydrographs in the Hillslope Subsurface
| Autor: | Milena Cislerova, Martin Šanda |
|---|---|
| Rok vydání: | 2009 |
| Předmět: |
subsurface trench
Water table dystric cambisol TA Engineering (General). Civil engineering (General) půdní vlhkost experimentální povodí dystrická kambizem hydrologické monitorování preferenční proudění experimental catchment Subsurface flow Water content Water Science and Technology Fluid Flow and Transfer Processes Hydrology geography Cambisol geography.geographical_feature_category Mechanical Engineering Bedrock crystalline granite bedrock podpovrchový příkop Hydraulic engineering hydrological monitoring Soil water krystalické žulové podloží Soil horizon soil moisture TC1-978 Surface runoff Geology preferential flow |
| Zdroj: | Journal of Hydrology and Hydromechanics, Vol 57, Iss 4, Pp 264-275 (2009) |
| ISSN: | 0042-790X |
| DOI: | 10.2478/v10098-009-0023-z |
| Popis: | Transforming Hydrographs in the Hillslope SubsurfaceTo 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. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|