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

Experimentelle Rinnenerosionsforschung vs. Modellkonzepte – Quantifizierung der hydraulischen und erosiven Wirksamkeit von Rinnen
covered with grass. The rock fragment cover is about 10%. The dominating runoff process
mapped for this rill is HOF.
The second rill is a naturally developed rill on an abandoned field with an average slope of
11° and a maximum slope of 16°. This medium developed rill (width between 5 and 20cm,
depth between 5 and 10 cm) shows a dense rock fragment cover (about 30%) and is only
partially (about 10%) grass-covered. The dominating runoff process is the SOF.
Rill 3 is also a naturally developed rill, that has cut into an old slump. The average slope is
11.3° and the maximum slope 14.5°. The rill is rather deeply incised with width between 10
and 50 cm and depth between 15 and 20 cm. It shows a dense rock fragment cover of about
30% and almost no vegetation cover (about 5%). Rill 3 was just tested over 15 m, because it
was expected that the water would not reach the 25 m standard test length on the slump
material. So, also the slope was just measured over the 15 m. (Fig. 3) The dominating runoff
process is also SOF.
Fig. 2: Profiles of the 3 rills. The measuring points are also marked.
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