. . "VLIV REZOLUCE CT DAT A PROSTOROV\u00C9HO PR\u016EM\u011AROV\u00C1N\u00CD NA PROUD\u011AN\u00CD VODY V 3D HETEROGENN\u00CDM P\u00D3ROVIT\u00C9M SYST\u00C9MU"@cs . . "561845" . . . . "21110" . . "neuvedeno" . "Effect of CT image resolution and spatial averaging on three-dimensional heterogeneous water flow"@en . "VLIV REZOLUCE CT DAT A PROSTOROV\u00C9HO PR\u016EM\u011AROV\u00C1N\u00CD NA PROUD\u011AN\u00CD VODY V 3D HETEROGENN\u00CDM P\u00D3ROVIT\u00C9M SYST\u00C9MU"@cs . . "[DF1143686725]" . "Effect of CT image resolution and spatial averaging on three-dimensional heterogeneous water flow"@en . "Bratislava" . "Effect of CT image resolution and spatial averaging on three-dimensional heterogeneous water flow" . "80-89139-05-1" . . "This contribution aims at evaluating different degree of soil sample heterogeneity with emphasis on resulting water fluxes. Sandy loam soil from Korkusova Hut was subject to CT imaging with high resolution. The three-dimensional distribution of CT-derived porosity within the sample was used in numerical experiments. Voxel porosity was employed for the calculation of the distribution of hydraulic conductivity scaling factor. Water flow through the heterogeneous soil sample was simulated by 3D model based on Richards' macroscopic concept. From our simulations, it follows that the spatial averaging is less appropriate technique, since it alters significantly the original CT data. Generally, reducing the CT acquired information in model input weakens the impact of heterogeneous structures and thus provides less realistic description of the flow in the soil under the study."@en . "This contribution aims at evaluating different degree of soil sample heterogeneity with emphasis on resulting water fluxes. Sandy loam soil from Korkusova Hut was subject to CT imaging with high resolution. The three-dimensional distribution of CT-derived porosity within the sample was used in numerical experiments. Voxel porosity was employed for the calculation of the distribution of hydraulic conductivity scaling factor. Water flow through the heterogeneous soil sample was simulated by 3D model based on Richards' macroscopic concept. From our simulations, it follows that the spatial averaging is less appropriate technique, since it alters significantly the original CT data. Generally, reducing the CT acquired information in model input weakens the impact of heterogeneous structures and thus provides less realistic description of the flow in the soil under the study." . . . "Effect of CT image resolution and spatial averaging on three-dimensional heterogeneous water flow" . "Du\u0161ek, Jarom\u00EDr" . "Tento p\u0159\u00EDsp\u011Bvek se zam\u011B\u0159uje na vyhodnocen\u00ED r\u016Fzn\u00E9ho stupn\u011B p\u016Fdn\u00ED heterogenity s d\u016Frazem na proud\u011Bn\u00ED vody. Po\u010D\u00EDta\u010Dov\u00E1 tomografie (CT) s vysokou p\u0159esnost\u00ED byla vyu\u017Eita k sn\u00EDmkov\u00E1n\u00ED p\u016Fdn\u00ED struktury kambizem\u011B z Korkusovy Hut\u011B. T\u0159\u00EDrozm\u011Brn\u00E9 rozlo\u017Een\u00ED p\u00F3rovitost\u00ED z\u00EDskan\u00E9 z CT se pou\u017Eilo k n\u00E1sledn\u00FDm numerick\u00FDm experiment\u016Fm. Pro ka\u017Ed\u00FD voxel-uzel se vypo\u010D\u00EDtal odpov\u00EDdaj\u00EDc\u00ED scaling faktor pro hydraulickou vodivost. Proud\u011Bn\u00ED vody se simulovalo 3D modelem zalo\u017Een\u00E9m na Richardsov\u011B makroskopick\u00E9m konceptu. Vstupn\u00ED CT data byla upravov\u00E1na pomoc\u00ED prostorov\u00E9ho pr\u016Fm\u011Brov\u00E1n\u00ED a numerick\u00E9ho sni\u017Eov\u00E1n\u00ED CT rezoluce. Prostorov\u00E9 pr\u016Fm\u011Brov\u00E1n\u00ED hydraulick\u00FDch parametr\u016F se uk\u00E1zalo jako nejm\u00E9n\u011B vhodn\u00E9, nebo\u0165 tato technika zna\u010Dn\u011B zm\u011Bnila charakter origin\u00E1ln\u00EDch CT dat. Zm\u011Bna origin\u00E1ln\u00EDch CT dat obecn\u011B vede k oslaben\u00ED heterogenn\u00ED struktury a tud\u00ED\u017E k nerealistick\u00E9 p\u0159edpov\u011Bdi proud\u011Bn\u00ED vody."@cs . "6"^^ . "5"^^ . . . . . "Dohnal, Michal" . "P(SA/650/5/03), Z(MSM 211100002)" . . . . . "RIV/68407700:21110/04:01104913!RIV/2005/MSM/211105/N" . "CT imaging; heterogeneous soils"@en . "B\u0159ezina, J." . . "RIV/68407700:21110/04:01104913" . "C\u00EDslerov\u00E1, Milena" . "Vogel, Tom\u00E1\u0161" . . "Sn\u011Bhota, Michal" .