EXECUTIVE SUMMARY

Introduction

The Duck Creek Flood Study has been prepared for Wollongong City Council (Council) to define the existing flood behaviour in the Duck Creek catchment and establish the basis for subsequent floodplain management activities.
The primary objective of the Flood Study is to define the flood behaviour of the Duck Creek catchment through the establishment of appropriate numerical models. The study has produced information on flood flows, velocities, levels and extents for arange of flood event magnitudes under existing catchment and floodplain
conditions. Specifically, the study incorporates:

• Compilation and review of existing information pertinent to the study and acquisition of additional data including survey as required;

• A community consultation and participation program to identify local flooding concerns, collect information on historical flood behaviour and engage the community
  in the on-going floodplain management process;

• Development and calibration of appropriate hydrologic and hydraulic models;

• Determination of design flood conditions for a range of design event including the 10% AEP, 5% AEP, 2% AEP, 1% AEP, 0.5% AEP and extreme flood event; and

• Presentation of study methodology, results and findings in a comprehensive report incorporating detailed flood mapping.