Floodplain Risk Management

Floodplain risk management studies use outcomes from flood studies to assist Councils and the community to effectively manage flood risk, while continuing to develop the floodplain in an appropriate and sustainable way.

BMT WBM has completed numerous floodplain risk management studies which assist local governments to manage and mitigate existing flood risk, educate the community about flooding, improve land use planning to reduce future flood risk exposure and quantify the impact of potential future development.

Flood risk management plans developed by BMT WBM consider economic, social and environmental perspectives and utilise a wide range of land use and management strategies for the floodplain.  Our flood risk management plans have a high level of acceptance from the community.

Estimating the ability for a community to evacuate during a flood event can be one of the most difficult parts of a Floodplain Risk Management Study. Evacuation capability asessments require consideration of many overlapping processes such as warning time, evacuation routes, road closures and population demographics.

We have developed a GIS-based evacuation planning model which dynamically links:

  • Hydraulic model output
  • Evacuation route information
  • Population statistics

We can offer the following specialised floodplain management services:

  • Development of practical floodplain management plans
  • GIS based flood damage and evacuation capability assessments
  • Options assessment for developments and structural mitigation
  • Cost benefit assessments of floodplain management options
  • Community survey, consultation and education
  • Flood risk and emergency response mapping
  • Consultation with town planners to better integrate flood planning controls 

Recent Relevant Projects

Brisbane Pilot Catchment Flood Risk Management Plan (Queensland)

BMT WBM designed a methodology to undertake a catchment flood risk management plan to specifically meet the needs of Brisbane City Council. The methodology reviewed a wide range of domestic and international floodplain management processes to develop a framework which assists Council identify flooding issues in individual catchments and assess management measures suitable for the entire local government area.  The methodology was tested on a catchment within Council’s area in order to assess its overall suitability.

Newcastle Flood Risk Management Study (NSW)

The City of Newcastle has some 22,000 properties that are flood-prone, equivalent to one in every three.  The flooding that occurred in June 2007 highlighted the vulnerability of Newcastle to flooding, and flash flooding in particular.  BMT WBM was engaged by Newcastle City Council to undertake an initial scoping strategy for flood management across the whole city.  A risk-management approach was adopted to help identify and prioritise highest risk locations, leading to development of city-wide flood planning strategy incorporating potential mitigation measures and land use and development controls.  BMT WBM then assisted Council in late 2011 to prepare a full City-wide Flood Plan, which detailed actions and strategies for addressing existing shortcomings in local flood risk management.

Tatura Floodplain Management Study (Victoria)

Flooding in the township of Tatura, near Shepparton, is influenced by the extremely flat topography and the complex series of flow paths through the township’s urban drainage system. BMT WBM was engaged to develop a Floodplain Management Plan for Tatura with the aim of minimising the social and economic impacts of flooding in the area. The study assessed potential floodplain management options using a risk management approach based on detailed hydrological and hydraulic analysis. Key outputs from the study included recommended structural and non-structural floodplain mitigation measures, and detailed flood inundation and planning maps coupled with a progressive communication and consultation program to ensure stakeholder ownership of the outcomes. 


TUFLOW Products is a suite of advanced numerical engines and supporting tools for simulating free-surface water flow for urban waterways, rivers, floodplains, estuaries and coastlines.

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