Description
Flood maps are created by combining hydraulic model results with high-accuracy ground information. Field surveys and LiDAR remote sensing are used to collect river and floodplain elevations, channel cross section data, bridge and culvert information, and flood berm details. A hydrology assessment using recorded and historic flow measurements is typically used to estimate river flows for a wide range of possible open water floods with different chances of occurring each year. When appropriate, an ice jam frequency analysis is undertaken. All this information is used to build a hydraulic model of a river system, which is calibrated using highwater marks and aerial imagery from past floods to ensure that results for the different flood flows being mapped are reasonable. Flood inundation maps show areas at risk for different sized floods, including ice jam floods in some communities. These maps also identify areas that could be flooded if berms or other flood control structures fail and are typically used for emergency response planning and to inform local infrastructure design. Flood hazards have not been identified along all rivers or through all communities, and it is important to remember that risk exists in areas without provincial flood maps. Visit www.floodhazard.alberta.ca for more information about the Flood Hazard Identification Program. The website includes different sections for final flood studies and for draft flood studies. Flood maps can be viewed directly using the Flood Awareness Map Application at floods.alberta.ca. The Alberta Flood Mapping GIS dataset is updated when new information is available or existing information changes. therefore, the Government of Alberta assumes no responsibility for discrepancies at the time of use.
Updated
October 21, 2020
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Resources
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Alberta Flood Mapping - (HTML)
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Alberta Flood Mapping - (XML)
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Title and Dataset Information
Alternative Title
Alberta Flood Mapping
Date Modified
2020-10-21
Update Frequency
Irregular
Publisher / Creator Information
Publisher
Environment and Parks
Subject Information
Resource Dates
Date Created
2020-10-21
Date Added to catalogue
2020-12-18T04:51:56.401574
Date Issued
1700-01-01
Date Modified
2020-10-21
Audience information
Language
Identifiers
Usage / Licence
Contact
Contact Name
Alberta Environment and Parks, Government of Alberta