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National Repository of Grey Literature 3 records found  Search took 0.01 seconds. 
Time variabilty of soil hydraulic properties and their impact on soil moisture estimation
 Šípek, Václav ; Vlček, Lukáš ; Tesař, Miroslav ; Zelíková, Nikol ; Hnilica, Jan
The study was focused on the temporal variability of saturated hydraulic conductivity in an experimental plot covered by spruce forest and investigated benefits of its incorporation into soil water balance model. The results showed that the higher saturated hydraulic conductivity (33.6-44.8 cm hr-1) was observed in summer period compared to lower values (13.2-22.3 cm hr-1) in the winter period. The use of seasonally variabile saturated hydraulic conductivity improved the efficiency of soil water balance model in terms of lower root mean square error between observed and simulated volumetric soil water content by 33.2 %. The Nash-Sutcliffe coefficient rose from 0.34 to 0.68.
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Report on the hydroledological survey in the Černý Důl, Krkonoše Mts.
 Šípek, Václav ; Vlček, Lukáš ; Zelíková, Nikol
The report documents results of hydropedological survey in the Černý Důl, Krkonoše Mts. Two experimental sites were selected based on the requirements of National Park Krkonoše with the aim to determine the effect of bark beetle outbreak on the soil water regime. The report contains description of soil hydraulic properties at two plots (healthy and impacted forest) for several soil horizons which will serve as a basis for hydropedological model.\n
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Impact of Pedogenetic Processes on Pore System Development and Consequently on Soil Hydraulic Properties
 Kodešová, R. ; Kodeš, V. ; Žigová, Anna
Soil micromorphological properties were studied on soil thin sections to define configuration of soil porous system that is reflected in a shape of soil hydraulic properties. The micromorphological study of soil porous systems discovered multimodality of pore-size distributions and hierarchical pore configuration. Some pore systems were affected by clay coatings. The soil water retention curves also frequently display multimodality. The single-porosity and dual-permeability models in HYDRUS-1D (Šimůnek et al., 2003, 2005) were applied for description of soil hydraulic properties and soil water flow. Results showed a very important impact of multimodality of soil porous systems and effect of clay coatings on water flow process in soil.
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