Flat Rock Creek Flood Study

Brief description

The Flood Study had three main components:

1. __Review__ of available hydrologic and hydraulic data and previous investigations.
As mentioned, a Brief was prepared for a cross sectional survey of the Southern
Tributary to fill in gaps in the survey data. Historic flood marks identified by the
Community Newsletter were also levelled during the creek survey.
The Bureau of Meteorology and Sydney Water supplied rainfall data for the historic
storms identified in previous investigations on flooding on Flat Rock Creek and by the
Community Newsletter.
2. __The hydrologic component__, which included refining and testing of the hydrologic
model of the catchment, estimation of design storm rainfalls and their application to
the model to assess flows.
3. __The hydraulic component__, which comprised the testing of the hydraulic model of the
open channel section of Flat Rock Creek and the preparation of the Southern
Tributary model and the definition of the water surface profiles, flows and velocities
for the design floods.