In 2020 Burchills Engineering Solutions were engaged by the City of Gold Coast Council to undertake the conceptual design, modelling and mapping of the stormwater quantity components of the Local Government Infrastructure Plan (LGIP) for four catchments (Gin House Creek, Lower Coomera River, Currumbin Creek & Pimpama River).
The purpose of the project was to gain an understanding of where existing trunk stormwater infrastructure is unable to support future growth, and what additional infrastructure is required to service future development.
The performance of existing detention facilities, potential detention facilities (on-line and off-line) and the required trunk infrastructure sizing (pipes and channels) within the study areas were assessed for the current development scenario (2016) and in five-year increments from 2021 to 2041 as the ultimate development scenario. URBS hydrology models were built and calibrated to real events for the flows used for the hydraulics calculations. XPSWMM was used to complete the hydraulic analysis and to inform the concept design and sizing of future infrastructure.