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

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F19%3A00339272" target="_blank" >RIV/68407700:21110/19:00339272 - isvavai.cz</a>

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

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

Original language description

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.

Czech name

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Czech description

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Type

O - Miscellaneous

CEP classification

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OECD FORD branch

20701 - Environmental and geological engineering, geotechnics

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

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

Publication year

2019

Confidentiality

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