Particle and aggregates size distribution of soil transported due to rainsplash, surface runoff and rill erosion

Kód výsledku v IS VaVaI

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Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Particle and aggregates size distribution of soil transported due to rainsplash, surface runoff and rill erosion

Popis výsledku v původním jazyce

In this contribution the grain size distributions of the soil sediment obtained from soil erosion experiments of different scales are analysed. All the tests were done on arable topsoil’s, separately the size distribution of the soil aggregates and individual soil particles were evaluated. Soil erosion was initiated under the controlled conditions in the laboratory. The rainfall was artificially generated with use of a nozzle type rainfall simulator. The sediment form splash erosion was collected in the splash cups, the sediment transported due to the surface runoff and rill erosion was collected from the discharge of the inclined soil erosion plots (slopes 20 – 34 %, slope length 8 m). Three methods for the soil particle analyses were tested: (i) conventional combination of the sieving and hydrometer methods; (ii) automated analysis with PARIO device (METER Group); (iii) laser diffractometer Mastersizer 3000 (Malvern Panalytical). These methods were evaluated in terms of reproducibility of results, time demands and usability. By the comparison of the grain size distribution determined by laser diffractometer, the different response to the soil erosion mechanism and the influence of external factors (soil slope, sampling time from the surface runoff, presence of protection measures on the surface) on the grain size distribution and soil aggregate content in eroded sediment were investigated. It has been found that both the particle size and aggregates size distribution of the eroded sediment changes considerably in time.

Název v anglickém jazyce

Particle and aggregates size distribution of soil transported due to rainsplash, surface runoff and rill erosion

Popis výsledku anglicky

In this contribution the grain size distributions of the soil sediment obtained from soil erosion experiments of different scales are analysed. All the tests were done on arable topsoil’s, separately the size distribution of the soil aggregates and individual soil particles were evaluated. Soil erosion was initiated under the controlled conditions in the laboratory. The rainfall was artificially generated with use of a nozzle type rainfall simulator. The sediment form splash erosion was collected in the splash cups, the sediment transported due to the surface runoff and rill erosion was collected from the discharge of the inclined soil erosion plots (slopes 20 – 34 %, slope length 8 m). Three methods for the soil particle analyses were tested: (i) conventional combination of the sieving and hydrometer methods; (ii) automated analysis with PARIO device (METER Group); (iii) laser diffractometer Mastersizer 3000 (Malvern Panalytical). These methods were evaluated in terms of reproducibility of results, time demands and usability. By the comparison of the grain size distribution determined by laser diffractometer, the different response to the soil erosion mechanism and the influence of external factors (soil slope, sampling time from the surface runoff, presence of protection measures on the surface) on the grain size distribution and soil aggregate content in eroded sediment were investigated. It has been found that both the particle size and aggregates size distribution of the eroded sediment changes considerably in time.

Druh

O - Ostatní výsledky

CEP obor

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OECD FORD obor

20701 - Environmental and geological engineering, geotechnics

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2019

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů