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NSW Flood Data Portal

Floodplain Risk Management Study and Plan

Allans Creek Flood Study & Floodplain Risk Management Study and Plan 2024

The Allans Creek Catchment is located in the Wollongong Local Government Area (LGA). Covering an area of 45 square kilometres, the catchment is largely urbanised. Allans Creek drains from the Illawarra Escarpment, situated west of central Wollongong, towards Port Kembla Harbour, where it connects with the Pacific Ocean.

This study provides a comprehensive assessment of the existing flood risk in the catchment. The assessment includes an evaluation of hydraulic hazards across the study area, over-floor flooding of residential, commercial, and industrial properties, identification of known flooding issues and hotspots, and emergency response strategies during flood events. Various measures aimed at managing this flood risk were assessed for their efficacy across a range of criteria. These options were rated using a detailed matrix of possible impacts. The highest-rated measures have been recommended in the Floodplain Risk Management Plan, prioritised based on their ease of implementation, capital cost, existing constraints, and overall effectiveness. Measures with low costs that can be readily implemented and effectively reduce damage or personal danger are given high priority.

Datasets

  • Report PDFs - all volumes
    Final
    Flood Study and Floodplain Risk Management Study and Plan
    Publication date: 14/06/2024
    Revised flood study and floodplain risk management Study and plan.
  • All Other Required Data
    Final
    Options Analysis
    Publication date: 14/06/2024
    Damages and Options Assessment
  • Hydrological, Hydraulic and flood damage pre-processed model output files
    Final
    Raw TUFLOW Results
    Publication date: 14/06/2024
    Raw Results
  • Hydrological, Hydraulic and flood damage model input files
    Final
    TUFLOW Model
    Publication date: 14/06/2024
    Tuflow Model
  • Spatial flood layers (post processed layers - not direct model outputs)
    Final
    Model Outputs
    Publication date: 14/06/2024
    Raster and Vector Output Data
  • Hydrological, Hydraulic and flood damage pre-processed model output files
    Final
    Hydrology
    Publication date: 14/06/2024
    WBNM

Additional Information

Field Value
Title Allans Creek Flood Study & Floodplain Risk Management Study and Plan 2024
River Basin 214 - Wollongong
Commission Date 6 June 2020
Publication Date 14 June 2024
Themes Land and Resource Management
Spatial Extent
© OpenStreetMap contributors
Council/LGA Wollongong City Council
Author/ Prepared by Rhelm
Publish date 14 June 2024
Update date 11 October 2024
Place Name Allans Creek
Approval State Approved
Submitted for approval 11 October 2024
Submitted by SES System Administrator
Approved 11 October 2024
Approved by ses-sysadmin
Identifier d64f5301-9044-4a84-a795-6a1f1195ab84