| |
Litres/Second |
Max. Catchment Area |
| HY160 CODE CHANNELS |
13.5 |
571 m2 |
| HY110 CODE CHANNELS |
5.0 |
212 m2 |
| HY75 CODE CHANNELS |
1.9 |
79 m2 |
| HY100 CODE CHANNELS |
3.7 |
159 m2 |
Capacity and catchment area figures are calculated assuming:
- Channel gradient = 1 in 250 (20mm fall over 5m length).
- Surface roughness (Mannings n) = 0.0212 for smooth concrete.
- Rainfall intensity = 100mm/hour — (a ten-year storm in the Auckland City area.)
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