Under Our Feet and On the Horizon: A Two Decade Review Erosion Hazard Assessment in Ontario

October 21, 2021 @ 12:00 pm – 1:00 pm
Amanda Slaght

STEP Webinar Series 2021


The Ontario government’s Flood Strategy includes recommendations to further enhance natural hazard policies in the 2020 Provincial Policy Statement (PPS) and to update existing technical guidelines. As flooding and erosion hazards are inextricably linked, this is an important opportunity to update the associated technical guidelines for erosion hazard assessment after over two decades of service. The 2002 flooding and erosion hazard guidelines were prepared by the Ontario Ministry of Natural Resources (MNRF) to assist the public and planning authorities, such as municipalities and conservation authorities, with an explanation of the Natural Hazards Policies (3.1) of the PPS of the Planning Act starting in 1996. They were also referenced under the Adaptive Management of Stream Corridors in Ontario publication and in the PPS updates in 2005 and 2014. The Geomorphology Subcommittee for Professional Geoscientists Ontario has reviewed the erosion hazard guidelines and has submitted letters to MNRF recommending updates to address specific technical issues; general scientific and technological advancement; and guiding principles for policy application. An essential topic to be emphasized is climate change risk. This presentation will communicate these recommendations more broadly to industry as MNRF begins the guideline update process in 2021. Some of the gaps in the existing guidelines will also be highlighted based on recent initiatives by Credit Valley Conservation to provided guidance on vertical scour analysis and instream erosion thresholds for stream and river channels.


Space is limited. For additional information, please contact us at STEP@trca.ca.

This webinar is part of the STEP Water 2021 Webinar Series.

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