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Alberta Flood Mapping

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,... More ≫

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...

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Surface materials of the Calgary urban area - geological contacts (GIS data, line features)

Description

This is a GIS dataset containing digitized and attributed line features from scanned Alberta Geological Survey Maps 201, 202, 203 and 204. The data show the surficial geology of the Calgary urban... More ≫

Description

This is a GIS dataset containing digitized and attributed line features from scanned Alberta Geological Survey Maps 201, 202, 203 and 204. The data show the surficial geology of the Calgary urban area (NTS areas 82O/01, 82P/04, 82J/16 and 82I/13) and are attributed with geological contact boundaries defined and inferred as shown on the maps. The data from the four maps are presented in a single line layer.

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Surface materials of the Calgary urban area - linear landforms (GIS data, line features)

Description

This is a GIS dataset containing digitized and attributed line features from scanned Alberta Geological Survey Maps 201, 202, 203 and 204. The data show the surficial geology (linear landforms) of... More ≫

Description

This is a GIS dataset containing digitized and attributed line features from scanned Alberta Geological Survey Maps 201, 202, 203 and 204. The data show the surficial geology (linear landforms) of the Calgary urban area (NTS areas 82O/01, 82P/04, 82J/16 and 82I/13). Features shown on the maps include fresh and buried scarps, minor traverse ridges, streamlined glacial landforms and buried valleys . The data from the four maps are presented in a single line layer.

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Surface materials of the Calgary urban area - veneer material (GIS data, polygon overlay features)

Description

This is a GIS dataset containing digitized and attributed polygon features from scanned Alberta Geological Survey Maps 201, 202, 203 and 204. The data show the supplemental surficial geology of... More ≫

Description

This is a GIS dataset containing digitized and attributed polygon features from scanned Alberta Geological Survey Maps 201, 202, 203 and 204. The data show the supplemental surficial geology of the Calgary urban area (NTS areas 82O/01, 82P/04, 82J/16 and 82I/13). Polygons, representing a discontinuous layer, are attributed as sand and silt veneer or buried sand, as shown on the maps. The data from the four maps are presented in a single polygon layer.

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Surface materials of the Calgary urban area (GIS data, polygon features)

Description

This is a GIS dataset containing digitized and attributed polygon features from scanned Alberta Geological Survey Maps 201, 202, 203 and 204. The data show the surficial geology of the Calgary... More ≫

Description

This is a GIS dataset containing digitized and attributed polygon features from scanned Alberta Geological Survey Maps 201, 202, 203 and 204. The data show the surficial geology of the Calgary urban area (NTS areas 82O/01, 82P/04, 82J/16 and 82I/13) and are attributed with stratigraphic unit, lithology, lithogenesis, morphology, veneer material and the unit labels as shown on the maps. The data from the four maps are presented in a single polygon layer.

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