PIV du Gouvernement du Québec

Flood-risk areas mapping and management

The spring floods of 2017 affected a vast area within Québec. The frequency and intensity of similar events will be affected by climate change. The management of flood-risk areas shall be adaptive thanks to notably real time data, future climate mapping or regarding land development purposes.

Québec already has many floodplain models and maps for various rivers within its boundaries, and uses the Protection Policy for Lakeshores, Riverbanks, Littoral Zones and Floodplains. However, the spring 2017 floods cast light on the need to rethink the scope of the available tools, as well as consider future needs and the possibility of reviewing the floodplain management policy.

The aim of this Plenary Session was to look at the level of efficiency of our ways of doing things and current Québec measures, with a view to ensuring that management and oversight can evolve, adapt and apply to all flood-risk areas.



  • Pascal Sarrazin, Team Leader, development and hydric environments, Ministère du Développement durable, de l’Environnement et de la Lutte contre les changements climatiques
  • Jean Francoeur, Chief engineer (floodplains), hydrology and hydraulics department, Ministère du Développement durable, de l’Environnement et de la Lutte contre les changements climatiques
  • Jason Thistlethwaite, Assistant Professor and Director of the Climate Change Project, University of Waterloo
  • Daniel Henstra, Associate Professor, Department of Political Science, University of Waterloo
  • Sally Priest, Head of Flood Hazard Research Centre, Middlesex, University, London
  • Catherine Wright, Director of Digital and Skills, Flood and Coastal Risk Management, Environment Agency



Please note that some references quoted on this page may only be available in French.


Government of Québec Initiatives


Experience in other parts of Canada

  • Canadian Voices on Changing Flood Risks: Findings from a National Survey. Jason Thistlethwaite, Daniel Henstra, Shawna Peddle and Daniel Scott, 2017. [PDF]
    This report presents the results of a Canada-wide survey of 2,300 respondents on their perception of flood risk. According to the study’s findings, Québec property owners are the least willing to contribute more to the cost of prevention and rehabilitation.


International experience