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Engineering Hydrology Plans (IWMP)
Plans and drawings
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Log in to see the plans as drawn2.2 Stormwater Quality Treatment
2.2.1 Strategy
Environmental best management practices are proposed for treatment of
stormwater flowing through the site. Two (2) separate scenarios were analysed
which represent:
1. Post Development: with No Mitigation Scenario (Unmitigated); and
2. Post Development: with Mitigation Scenario (Mitigated).
The treatment train for the proposed development is shown in Figure 3. Runoff
from roofed areas will be collected in rainwater tanks and re-used for irrigation and
non-potable internal uses. The tanks have been sized to achieve a minimum 80%
reliability. Overflow from the tanks and road runoff will be treated via bioretention
systems prior to discharge from the site.
ROAD ROOFED AREA
RAINWATER TANK
BIORETENTION SYSTEM
RECEIVING ENVIRONMENT
Figure 3: Conceptual Treatment Train
5
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