A Hydraulic Impact Assessment was carried out to support the development application of a site subjected to Moreton Bay Regional Council (MBRC) flood hazard overlays, overland flow paths, and environmental (waterways) overlays.
The development site, being a 34.8ha lot with a local creek passing through, had multiple proposed internal waterway crossings as well as pre-existing hydraulic infrastructure. The scope of the project was to develop, calibrate, and test hydrologic and hydraulic models for the catchment in order to inform and devise appropriate mitigation strategies.
Highlights:
- Hydrologic modelling for the 1, 2, 5, 10, 20, 50 and 100 year average
- Incorporation of site survey and proposed levels into the developed scenario
- Two dimensional, unsteady hydraulic model, incorporating sub-grid scale piped drainage networks using one-dimensional modelling to estimate flood levels within the area