ABCW-3 Under Technical Review Engine v0.9.0
Vegetated Swale calculator
Manning normal-depth solution for a trapezoidal vegetated swale: flow depth, hydraulic radius, velocity, Froude number, capacity, freeboard, erosion and safety checks, and treatment checks.
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
- Base width (m)
- Side slope (H:1V)
- Swale depth (invert to top of bank) (m)
- Longitudinal slope (%)
- Swale length (m)
- Manning n at treatment flow (vegetation submerged below height)
- Manning n at minor / major flow
- Design treatment flow (m3/s)
- Minor flow (5-yr ARI) (m3/s)
- Major flow (m3/s)
- Vegetation height (m)
- Minimum freeboard at minor flow (m)
- Maximum velocity at minor flow (scour) (m/s)
- Maximum velocity at major flow (m/s)
- Maximum velocity x depth at major flow (safety) (m2/s)
- Predicted TSS load reduction (EP sizing curve or MUSIC) (%)