EGU2020-13446
https://doi.org/10.5194/egusphere-egu2020-13446
EGU General Assembly 2020
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.

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

Romana Kubínová, Petr Kavka, Martin Neumann, and Tomáš Laburda
Romana Kubínová et al.
  • Czech Technical University in Prague, Faculty of Civil Engineering, Department of Irrigation and Landscape Engineering, Czechia (romana.kubinova@fsv.cvut.cz)

In this contribution the grain size distributions of the soil sediment obtained from soil erosion experiments were 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 laboratories. The rainfall was artificially generated with use of a nozzle type rainfall simulator. 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 4 m).

The soil sediment was collected in four sampling times. The first and the second were collected in fifteen and thirty minutes from the beginning of the simulation, then followed fifteen minutes long pause without raining and then the simulation continued and soil samples were collected again in fifteen and thirty minutes from the beginning of the rain. After ten days long pause whole process were repeated at the same experimental plot contains rills from previous simulation. Experimental plots were vertically divided into two parts. On one part was an eel and on the second part were different types of rolled erosion control products (RECPs) – Enkamat 7010, Biomac-C, coir fibres K700 and K400, jute, Macmat 8.1 with soil, mulch, hay and nonwoven. The influence of RECPs to the grain size distribution was investigated.

Laser diffraction has been selected as a method to determine grain size distribution and device Mastersizer 3000 was used. By the comparison of the grain size distribution, of more than five hundreds samples, the different response to the soil erosion mechanism and the influence of external factors (experimental plot slope, sampling time from the surface runoff and presence of RECPs) on the grain size distribution and soil aggregates 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.

This research is funded by the TH02030428 - „Design of technical measures for slopes stabilization and soil erosion prevention”.

How to cite: Kubínová, R., Kavka, P., Neumann, M., and Laburda, T.: Particle and aggregates size distribution of soil transported due to surface runoff and rill erosion , EGU General Assembly 2020, Online, 4–8 May 2020, EGU2020-13446, https://doi.org/10.5194/egusphere-egu2020-13446, 2020

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