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NSW Flood Data Portal

Flood study

Hastings River Flood Study

The Hastings River is located on the Mid North Coast of New South Wales about 300 kilometres north of Sydney. The river drains a catchment area of 3,700 square kilometres and discharges to the Pacific Ocean at Port Macquarie. Tidal influence extends for about 32 kilometres upstream from the river mouth to Bains Bridge, which crosses the river about 3 kilometres to the west of Wauchope. The general approach and methodology employed to achieve the study objectives involved:

  • compilation and review of available information, including previously completed flood studies, streamflow gauge records, rainfall records, topographic mapping of the floodplain, hydrographic surveys of the river channels and details of bridge crossings;
  • site inspections to establish catchment roughness, slope, and land-use, and to identify additional survey needs and critical hydraulic controls such as bridges and weirs;
  • the collection of historical flood information, including records of peak flood levels for historical floods (such as occurred in 1963, 1968 and 1978);
  • the development of a computer based hydrologic model to simulate the transfer of rainfall into runoff and its concentration in streams during the flood;
  • the development of a computer based hydraulic model to simulate the movement of floodwaters through the lower reaches of the floodplain, generally downstream of tidal limits of all streams;
  • calibration and verification of the models; and,
  • the determination of peak water levels and flow velocities at selected locations along the Hastings, Wilson and Maria Rivers for the predicted 200, 100, 50 and 20 year recurrence floods and the probable maximum flood (PMF).

Additional Information

Field Value
Title Hastings River Flood Study
Publication Date 29 August 2006
Themes Land and Resource Management
Spatial Extent
Map data © OpenStreetMap contributors
Council/LGA Port Macquarie-Hastings Council
Author/ Prepared by Patterson Britton & Partners
Publish date 14 June 2019
Update date 26 June 2019
Approval State Approved
Submitted for approval 17 June 2019
Submitted by Akhil Sud
Approved 26 June 2019
Approved by shaun_epe
Identifier 0cd54649-8b13-4427-a942-6a1e75077154