2.1 PROJECT OVERVIEW
In 2014, Alberta Environment and Parks funded the development of the Provincial Flood Damage Assessment Tool (PFDAT). The PFDAT enables the standardised calculation of potential damage for varying levels of flood inundation within a community. This is done using three sets of data: depth-damage curves, community-specific property data, and community-specific inundation area data. Use of the PFDAT permits comparative benefit: cost analyses of proposed flood mitigation measures to be performed within communities for which the community models have been developed.
The purpose of this project is to use the PFDAT to develop community specific damage models for different flood frequencies for nine Alberta communities – the Cities of Medicine Hat and Red Deer; the Regional Municipality of Wood Buffalo (Fort McMurray); and the Towns of Canmore, Okotoks, High River, Black Diamond, Sundre, and Peace River. The study will cover open water flooding for all nine communities as well as ice jam flooding for Peace River and Fort McMurray.
Alberta Environment and Parks can supply the following data inputs to the successful Proponent:
• Partial building inventories for High River, Fort McMurray, Canmore and Okotoks
• Depth-damage curves for 2014 economic values
Open Water Mapping Products
• Water surface elevation TINs for the 2-, 5-, 10-, 20-, 35-, 50-, 75-, 100-, 200-, 350-, 500-750-, and 1000-year open water floods, prepared separately for each flood frequency scenario
• Water surface elevation and flood depth grids for the 2-, 5-, 10-, 20-, 35-, 50-, 75 , 100-, 200-, 350-, 500-, 750-, and 1000-year open water floods, prepared separately for each flood frequency scenario
• Geodatabase of: polygons delineating the inundation extent for the 2-, 5-, 10-, 20-, 35-, 50-, 75-, 100-, 200-, 350-, 500-, 750-, and 1000-year open water floods; and polylines delineating model cross sections to full extent, with all computed open water flood frequency levels contained as attributes (ArcGIS 10.3)
• ArcMap 10.3 map project file (.mxd) and all associated layers for the final open water flood inundation map library
Ice Jam Mapping Products
• Water surface elevation TINs for the 50-, 100-, and 200-year ice jam floods, prepared separately for each frequency scenario
• Water surface elevation and flood depth grids for the 50-, 100-, and 200-year ice jam floods, prepared separately for each frequency scenario
• Geodatabase of: polygons delineating inundation extents for the 50-, 100-, and 200-year ice jam floods; polylines delineating model cross sections to full extent, with all computed ice jam flood frequency levels contained as attributes (ArcGIS 10.3)
• ArcMap 10.3 map project files (.mxd) and all associated layers for the ice jam flood inundation map library
The successful Proponent will be required to acquire the relevant community-specific property data for use within the PFDAT. Property data will have to be created for Medicine Hat, Red Deer, Black Diamond, Sundre and Peace River. Property data for use in the PFDAT is available for Canmore, Okotoks, Fort McMurray and High River however these data sets will have to be expanded from the 1:100 extent to include the 1:1,000 inundation area.
The successful Proponent will also be required to update the PFDAT’s depth-damage curves to reflect current economic values and the relevant adjustment indices should be updated where necessary for their use in the various communities. A separate flood damage assessment report describing direct and indirect damage for various flood frequencies must be done for each community.
Proponents who wish to review the Provincial Flood Damage Assessment Tool prior to submitting a proposal can fill out the attached Non-disclosure and Licensing Agreement (See Appendix D) and return to the Contracting Manager. Once the agreement is signedand returned, the Proponent will be provided with the PFDAT plug-in and associated tutorial to assist with installation. The Tool runs off QGIS open-source software, version 2.x or higher. It is the Proponent’s responsibility to download their own copy of QGIS.
Tasks include:
• Update residential, commercial and industrial synthetic depth-damage curves to current economic values.
• Update adjustment indices for use in the nine study communities.
• Coordinate, facilitate and arrange for information & data gathering from the nine communities. Building stock data should include all structures located in the full study area, including a buffer for groundwater infiltration, (privately, government, and municipal owned). Proponents will also have to coordinate stakeholder engagement with Environment and Parks engagement staff.
• Correlate water surface elevations and depth grids from Alberta Environment and Parks mapping products to building locations.
• Apply the Provincial Flood Damage Assessment Tool to develop community specific damage models for different flood frequencies (1: 2, 1:5, 1:10, 1:20, 1:35, 1:50, 1:75, 1:100, 1:200, 1:350, 1:500, 1:750 and 1:1,000).
• Provide an implementation schedule consisting of planned tasks & activities, start & end dates, and the resources required to complete the tasks. Provide an updated schedule monthly.
• Arrange, coordinate and chair monthly project meetings. Minutes of the meetings should be recorded and distribute accordingly.
• Provide presentations to the client, relevant communities and other government ministries, as required and directed by the Province.
• Prepare a final risk assessment report for each community studied describing direct and indirect damage for various flood frequencies.
o Where mitigation is in place, the report should provide two damage estimates, one based on the mitigation working as designed and one based on the mitigation failing.
