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Table 3

Runoff characteristics for urban sandy soils in Sandnes and Trondheim

Sandnes
Trondheim
Wet conditions
Dry conditions
Wet conditions
Dry conditions
G-AHortonHoltanG-AHortonHoltanG-AHortonHoltanG-AHortonHoltan
Peak (l/s) 1.46 1.45 1.45 0.42 1.40 1.18 0.81 0.78 0.91 0.00 0.45 0.29 
Volume (m31.01 0.99 1.23 0.10 0.88 0.80 0.27 0.25 0.54 0.00 0.10 0.17 
Peak delay (min) 65 65 60 65 65 65 65 65 65 – 65 65 
Start time (min) 56 56 45 62 57 55 60 60 60 – 62 60 
Duration (min) 30 30 40 11 29 20 13 13 10 10 
Runoff (mm) 10.08 9.89 12.25 1.03 8.76 8.03 2.74 2.54 5.44 0.00 1.02 1.69 
Sandnes
Trondheim
Wet conditions
Dry conditions
Wet conditions
Dry conditions
G-AHortonHoltanG-AHortonHoltanG-AHortonHoltanG-AHortonHoltan
Peak (l/s) 1.46 1.45 1.45 0.42 1.40 1.18 0.81 0.78 0.91 0.00 0.45 0.29 
Volume (m31.01 0.99 1.23 0.10 0.88 0.80 0.27 0.25 0.54 0.00 0.10 0.17 
Peak delay (min) 65 65 60 65 65 65 65 65 65 – 65 65 
Start time (min) 56 56 45 62 57 55 60 60 60 – 62 60 
Duration (min) 30 30 40 11 29 20 13 13 10 10 
Runoff (mm) 10.08 9.89 12.25 1.03 8.76 8.03 2.74 2.54 5.44 0.00 1.02 1.69 

Note that the Holtan equation was simulated with 5 min time step and is not routed to an outlet as in the Green-Ampt (G-A) and Horton.

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