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Erosion, Runoff and soil crust

Mise à jour le 08/04/2014
Par eyraud

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Under the influence of rain, the ground surface can pass a porous state to a compact state, forming a crust of crusting which reduces the infiltration rate and promotes runoff and erosion

With rainfall simulator INRA Orleans, we can study soil erosion in the laboratory. During an experiment, trays filled with soil which is subjected to rain which is mastering the duration and intensity is employed. During this experimentation, it follows, over time, the intensity of rain, crust formation in slaking the ground surface, the muddy water flows and drips water percolating through the soil. These data are then presented in the form of graphs to summarize the results.

Educational Application:

Results of the experiment (Table Excel download)

Data are then represented as graphs and results synthesized:

  • Rain water runoff flow versus time
  • Rain runoff coefficient or proportion of water flowing versus rainwater seeping
  • Flow sediment versus time (g / min)


Correction:

Excel data sheet with the correction

Recorded explanations at the end of the film:

  • Rain water runoff flow versus time (g/min)
  • Rain runoff coefficient or proportion of water flowing versus rainwater seeping (%)
  • Flow sediment with time (g / min