The Exile Bay catchment covers a 345 hectare area with elevations that range from approximately 33m AHD to sea level at the Saltwater Creek channel and then discharges into Exile Bay proper. There are approximately 3700 cadastral lots within the catchment and as demonstrated in the recent flood event of 28 November 2018, heavy rainfall can cause flooding in the area, impacting both homes and commercial premises.

A key output of the study is a field checked set of “tagged” properties (i.e. lots within the FPA and subject to flood related development controls (see Section 9.6)). To achieve this output a calibrated best practise model is applied to the task of defining the 1% AEP event levels and flows. The purpose of this report is to inform stakeholders, especially Council, of the work completed to date, the history of flooding in the catchment and recommend to provide a basis for further work under the Floodplain Risk Management Program.

Flood_data

Contains gauge data collected as part of the study

Hydraulic

Contains the hydraulic model and associated data, including LiDAR and survey The TUFLOW model uses version 2016-03-AE-iDP-w64

Hydrology

Contains the hydrologic model and GIS layer of subcatchments The DRAINS model uses version 2019.02 (64 bit)

Results

Contains model results for historical and design flood events For ease of use, a single flood level grid is provided for each output (depth, level, etc) and design event. It also contains results from mitigation testing and the flood damages spreadsheet

Report

Contains the final flood study report including all figures.