Translations:Versickerung und Retention/130/en

Aus INTEWA Wiki
Version vom 20. November 2018, 15:18 Uhr von Sabrina (Diskussion | Beiträge)
(Unterschied) ← Nächstältere Version | Aktuelle Version (Unterschied) | Nächstjüngere Version → (Unterschied)
As = Ared / (kr x sf x 107 / 2 x r D(n) –1)
Ared = connected paved surfaces
sf = Joints proportion in a permeable paved area (0 < sf =< 1)
kr = Permeability coefficient in the considered infiltration layer
rD(n) = Rain yield
Example:
Ared = 300 m2
sf = 1 (INTEWA grass grid pavers)
kr = 2 x 10-4 m/s
r D(n) = from KOSTRA table with n=0.2/a and D=10 min: r10(0.2) = 204.60 L/sha
As = 300 / ( 2 x 10-4 x 1 x 107 / 2 x 204.6 –1) = 77 m2