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Flood study

Alipou Creek Flood Study

In August 1997, Water Studies Ply Ltd was requested by Clarence River County Council (CRCC) to undertake a flood study to investigate flooding behaviour in the Alipou Basin (i.e. areas bounded by Heber Street, Alipou Basin and Clarenza Levees) in South Grafton in general, and determine the impact of the recently constructed Heber Street Levee on flood levels in the above area in particular. This report is in response to the above request. Alipou Creek, a minor tributary of the Clarence River, drains a 32 square kilometres rural catchment to the east of South Grafton. The lower reaches of Alipou Creek are subject to both 'regional' flooding from the Clerence River and 'local' flooding from the Alipou Creek catchment itself. Numerous levees constructed over the years in North and South Grafton, including Heber Street and Alipou Basin Levees, have modified both regional and local flooding behaviour in the area of interest of this study. This report is structured as follows:

  • Section 2 describes the adopted method of analysis for the study and the range of local and regional flooding combinations investigated.
  • Section 3 describes the runoff - routing model used to estimate local flood inflows to Alipou Basin from Alipou and Musk Valley Creeks.
  • Section 4 describes the development and calibration of two hydraulic models (a regional 'coarse' model and a 'fine' local model) used to investigate flooding behaviour in the area of interest.
  • Section 5 describes the results of the investigation of various local and regional design event combinations.
  • Section 6 presents the conclusions of the study.
  • Section 7 provides a list of references.

Additional Information

Field Value
Title Alipou Creek Flood Study
Publication Date 1 February 1998
Themes Land and Resource Management
Spatial Extent
Map data © OpenStreetMap contributors
Council/LGA Clarence Valley Council
Author/ Prepared by Water Studies
Publish date 12 July 2019
Update date 12 July 2019
Approval State Approved
Submitted for approval 12 July 2019
Submitted by Akhil Sud
Approved 12 July 2019
Approved by dstazic
Identifier 2ba4e12e-e310-4240-ac72-d666cc94d881