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Hillston Floodplain Levee - Eastern Levee Hydraulic Model Study MIKE 11 Modelling 2007

The NSW Department of Commerce (DoC) was commissioned by the Carrathool Shire Council with assistance from the Department of Environment and Climate Change (DECC formerly the Department of Water Resources) to carry out additional hydraulic modelling investigations to finalise the design flood levels and alignment for the Hillston Eastern Levee. DoC was commissioned by Council to undertake the detailed design and documentation for the proposed Hillston Eastern Levee. The main objective of the current study was to undertake additional hydraulic modelling to determine the alignment and crest level of the proposed Hillston Eastern Levee and any associated works required to mitigate against any adverse flood impacts. The key tasks involved:

  1. Review all available data and information including “validating” the MIKE 11 model developed as part of the Flood Study, 2001 and the HEC-RAS model developed as part of the Urban Plan, 2005.
  2. Prepare an updated MIKE11 model for the current study area based on “existing’ or “current” conditions.
  3. Estimate design flood behaviour for “existing” conditions over the range of potential flood events (1990, 1% AEP and extreme flood).
  4. Modify the MIKE11 model to represent the current levee alignment and crest levels and the Norwood Lane floodway and assess the flood impacts on ‘existing’ flood behaviour.
  5. Assess a range of options to mitigate any adverse flood impacts identified in (4) above.
  6. Recommend a proposed alignment and crest levels for the levee and any associated works.

Additional Information

Field Value
Title Hillston Floodplain Levee - Eastern Levee Hydraulic Model Study MIKE 11 Modelling 2007
Publication Date 1 December 2007
Themes Land and Resource Management
Spatial Extent
Map data © OpenStreetMap contributors
Council/LGA Carrathool Shire Council
Author/ Prepared by Department of Commerce
Publish date 28 May 2020
Update date 28 May 2020
Approval State Approved
Submitted for approval 28 May 2020
Submitted by Akhil Sud
Approved 29 May 2020
Approved by dstazic
Identifier 9fc7a805-0c1f-4d29-a991-79aa247443b9