(Die Seite wurde neu angelegt: „{| class="wikitable" |colspan="2" style="text-align:center" | '''V<sub>erf</sub> = ((A<sub>red</sub> x r<sub>D(n)</sub> x 10<sup>-4</sup>) – Q<sub>dr</sub>…“)
| A<sub>red</sub> || = connected paved surfaces in m² (5,000 m² in example)
| A<sub>red</sub> || = connected paved surfaces in m² (5,000 m² in example)
|-
|-
−
| r<sub>D(n)</sub> || = crucial rainfall in L/s-ha (e.g. KOSTRA-Data Aachen, see Dimensioning of infiltration or retention systems)
+
| r<sub>D(n)</sub> || = crucial rainfall in L/sha (e.g. KOSTRA-Data Aachen, see Dimensioning of infiltration or retention systems)
|-
|-
| Q<sub>dr</sub> || = discharge throttle value in L/s (the arithmetic mean of the throttle curve with non-continuous throttles, see diagram of throttle curves, 21 L/s in the example)
| Q<sub>dr</sub> || = discharge throttle value in L/s (the arithmetic mean of the throttle curve with non-continuous throttles, see diagram of throttle curves, 21 L/s in the example)
Aktuelle Version vom 20. November 2018, 15:29 Uhr
Verf = ((Ared x rD(n) x 10-4) – Qdr ) x D x 60 x 10-3
Verf
= required storage volume in m³
Ared
= connected paved surfaces in m² (5,000 m² in example)
rD(n)
= crucial rainfall in L/sha (e.g. KOSTRA-Data Aachen, see Dimensioning of infiltration or retention systems)
Qdr
= discharge throttle value in L/s (the arithmetic mean of the throttle curve with non-continuous throttles, see diagram of throttle curves, 21 L/s in the example)
D
= Duration in min (in example, 30 min with the fixed throttle and vortex throttle, 20 min with the continuous throttle)
fixed throttle = vortex throttle: Verf = ((5,000 x 104.8 x 10-4) – 21) x 30 x 60 x 10-3 = 56.6 m³
continuous throttle: Verf = ((5,000 x 131.7 x 10-4) – 31) x 20 x 60 x 10-3 = 41.8 m³ (- 26 %)
