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

Experimentelle Rinnenerosionsforschung vs. Modellkonzepte – Quantifizierung der hydraulischen und erosiven Wirksamkeit von Rinnen
The catchment of rill 2 has an area of 400m², in this area two rainfall simulations were
accomplished. The runoff coefficients were 80% and 100%, the average sediment
concentrations 0.9 and 1.86 g l -1 . The runoff started after 61 s in the first simulation and still
after 14 s in the second simulation. The RR reaches 4.15 l s -1 .
In the catchment area of rill 3, no rainfall simulation was accomplished .
Table 3: Overview over the runoff values of the rill experiments: n.D. = no Data
rill 1 rill 2 rill 3
Factor 1a 1b 2a 2b 3a 3b
L = length [m] 25 25 25 25 15 15
IQ = inflow quantity [l] 72 72 72 72 72 72
II = inflow intensity [l s -1 ] 0.15 0.15 0.15 0.15 0.15 0.15
IF = inflow finish [s] 480 480 480 480 480 480
ID = inflow duration [s] 480 480 480 480 480 480
RQ = runoff quantity [l] 8.41 17.01 20 49.23 n.D. 10.09
RI = maximum runoff intensity [l s -1 ] 0.042 0.059 0.066 0.102 n.D. 0.052
RS = runoff start [s] 554 398 608 414 n.D. 442
RF = runoff finish [s] 904 832 1420 1612 n.D. 796
RD = runoff duration [s] 350 434 812 1198 n.D. 354
I = intensity factor 0.28 0.39 0.44 0.68 n.D. 0.34
DF = duration factor 0.73 0.90 1.69 2.5 n.D. 0.74
D = detention [s] 74 -82 128 -66 n.D. -38
T = time factor 1.15 0.83 1.27 0.86 n.D. 0.92
R = runoff rate [%] 11.68 23.63 27.78 68.38 n.D. 14.01
RL = r-l-factor 2.92 5.91 6.94 17.09 n.D. 2.1
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