ABCW-1 Under Technical Review Engine v0.9.0
Catchment Analysis (Rational Method) calculator
Weighted runoff coefficient and peak runoff for a development catchment using the Rational Method, with a comparison against an allowable runoff coefficient for peak runoff control.
Not a PUB approval. This calculator is under technical review and is not yet validated against PUB's official calculation template. A passing calculation does not establish compliance with PUB requirements. ABC Waters design calculations must be prepared and endorsed by an ABC Waters Professional / Qualified Person and submitted to PUB in the required format.
Available after technical review
This module will open once it has been validated against PUB's official ABC Waters calculation template and independently reviewed. The method, inputs and references are listed below.
Inputs
- Project / feature reference
- Total catchment area (ha)
- Impervious area (ha)
- Pervious area (ha)
- Runoff coefficient - impervious
- Runoff coefficient - pervious
- Design storm ARI (yr)
- Time of concentration (min)
- Rainfall intensity for ARI and tc (mm/h)
- Design rainfall depth (information) (mm)
- Allowable runoff coefficient for peak runoff control
- Existing average site level (mSHD)
- Proposed platform level (mSHD)