Microburst Software

  Step 1: Stormwater Connection Plan

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When a new development or redevelopment of a site occurs, the designer must demonstrate to Council and Sydney Water how the relevant stormwater planning requirements will be met.

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To do this, the designer prepares a Stormwater Connection Plan describing the proposed stormwater retention systems on the property, including information regarding all the elements shown in Figure 1.

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The example in Figure 3 is for a simple residential property. The plan for a large development site may require additional information including survey detail, levels and contours.

In this example, most impervious areas are connected to retention systems while some drain directly to street stormwater drains. Additional information such as the number of people or bedrooms, connections to toilet and laundry , local soil types and raingarden dimensions would be included.

Retention systems are shown for:

• Area 3 – the house roof is connected to a rainwater tank for use within the house and for yard watering.

• Area 5 – the rear shed roof stormwater runs across the backyard lawn and to a small raingarden / infiltration trench system.

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 Stormwater shouldn’t (by design) go directly to neighbouring properties.

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Enter the various catchments and areas into the design calculator.