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The City completed a groundwater study to deepen our understanding of Calgary’s river flood-induced groundwater risk. The study mapped groundwater levels during a 1 in 100-year flood event. The City is proposing to incorporate this into Calgary’s regulatory flood map as a new Groundwater Flood Fringe, and have developed draft regulations for public feedback.
How to complete this survey
We suggest starting by learning about the Groundwater Flood Fringe – what it is, how we developed the map, and what regulations are being proposed.
Next, you can learn about the where the Groundwater Flood Fringe applies in the city.
Lastly, click the ‘Survey’ tab to answer questions about the proposed Groundwater Flood Fringe map and regulations.
The City has developed a draft online interactive version of Calgary’s proposed Regulatory Flood Map for the purposes of the current Calgary River Valleys Project engagement. You can see the extent of each area city-wide and zoom in to your property to determine which hazard area, if any, applies to you.
Click here to view the draft online Regulatory Flood Map.
What is the Groundwater Flood Fringe?
River floods can impact groundwater levels, sometimes outside of the flood fringe.
The Groundwater Flood Fringe describes the area where development outside of the overland flood hazard area is subject to increased groundwater flooding risk when river flow rates are high. Risk in the Groundwater Flood Fringe increases during floods or when rivers are subject to extended periods of higher flow-rate (for example, during releases from an upstream reservoir after mitigating a flood event).
The Groundwater Flood Fringe is different from general groundwater risk, which can occur throughout Calgary and is not always due to high water levels in the city’s rivers and creeks.
To account for Groundwater Flood Fringe risk, The City of Calgary conducted the Calgary River Valleys Groundwater Study. This study involved:
The maps and draft regulations presented here highlight The City's proposed approach to mapping and regulating development in the Groundwater Flood Fringe.
Groundwater Flood Fringe accounts for residual risk not captured in Provincial Flood Hazard maps. It also addresses feedback from Calgarians, who wanted to acknowledge the role groundwater has played in flood risk in river communities.
We appreciate and acknowledge that we live, work, and play on the ancestral and traditional territories of the Blackfoot confederacy, made up of the Siksika, Piikani, Amskaapipiikani and Kainai First Nations; the Îethka Nakoda Wîcastabi First Nations, comprised of the Chiniki, Bearspaw, and Goodstoney First Nations; and the Tsuut’ina First Nation. The City of Calgary is also homeland to the historic Northwest Métis and to the Otipemisiwak Métis Government, Métis Nation Battle River Territory (Nose Hill Métis District 5 and Elbow Métis District 6). We acknowledge all Indigenous people who have made Calgary their home.
You see the results of decisions made by The City of Calgary every day. Get involved and provide your input on City projects and programs. Together we can build a better city.
Have questions or want to learn more about a project, contact us below:
| Phone | 311 or 403-268-CITY (2489) |
|---|---|
| engage@calgary.ca | |
| Website | www.calgary.ca |
