Stefan Wirtz Vom Fachbereich VI (Geographie/Geowissenschaften ...

Experimentelle Rinnenerosionsforschung vs. Modellkonzepte – Quantifizierung der hydraulischen und erosiven Wirksamkeit von Rinnen
Figure 7 shows that the loosening quantity increased from 305 g in the 1 st to 1538 g in the 3 rd
run and stayed at this level until the total of 600 goats passed after the 10 th run. After the 5 th
run, a slight decrease can be observed, but this is probably not significant.
Interpretation:
The increase in the amount of loosened material from run 1 to 3 can be traced back to a stepby-step
cracking of the sedimentation crust on the whole test plot. After 180 goats, the crust is
completely destroyed and the soil material is loosened with 1.5 kg 2 m -2 per 60 goats. The
slightly decreasing trend can be explained by lower availability of detachable crust material
and by increasing compaction. The measured loosening rate can be evaluated as high
regarding the value of 12.5 g m - ² per goat.
3.5 Flow detachment of loosened material
Figure 8: Sediment concentrations, transport and detachment rates of the rill experiment with
and without goat trampling (MP = measuring point)
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