Approach and Outcomes
Thirteen detailed TUFLOW direct rainfall models were developed of the catchment utilising a two-metre grid spacing derived from aerial and vehicle mounted LiDAR and incorporating the pit and pipe stormwater drainage network.
The TUFLOW models were validated against the 10th January 2011 flood event. Each model showed good agreement with anecdotal evidence (photos, depths and general flow path descriptions) obtained during the community engagement phase of the project.
The primary output of the project was mapping of overland flow paths for the 10% and 1% AEP events. The 10% AEP event was selected to assist in identifying stormwater pipe capacity constraints within Council’s existing network and the 1% AEP event to identify properties within major overland flow paths. Secondary outputs included a product for assisting with the management of drainage complaints.