National Repository of Grey Literature 2 records found  Search took 0.01 seconds. 
Pedogenesis of the Territory of Prague Affected by Human Activity
Žigová, Anna ; Šťastný, Martin
Soil cover affected by human activity in Prague is found generally in areas with loess deposits. Sites with different types of anthropogenic load, about 6 km apart, were selected for the study of pedogenesis. Soil profile of the first characteristic sequence was buried beneath a landfill layer 2,5 m thick. In the second sequence, the top part of the soil profile was affected by human activity. Characteristics of pedogenesis were determined using grain-size distribution, pH values, contents of CaCO3, Cox, Nt, cation exchange capacity and clay mineral contents. The character of pedogenetic processes was affected by anthropogenic factor to a variable degree. Lower influence on pedogenesis was encountered in the sequence with soil profile buried beneath a landfill layer.
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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