| Title | Flood risk assessment using MS Excel spreadsheet: a case study of Fredericton (New Brunswick) |
| |
| Author | McGrath, H ;
Stefanakis, E; Nastev, M |
| Source | 22nd Canadian Hydrotechnical Conference, proceedings/22e Conférence canadienne d'hydrotechnique, comptes rendus; 2015 p. 1-11 |
| Year | 2015 |
| Alt Series | Natural Resources Canada, Contribution Series 20180282 |
| Publisher | Canadian Society of Civil Engineering |
| Meeting | 22nd Canadian Hydrotechnical Conference; Montreal, QC; CA; April 29-May 2, 2015 |
| Document | book |
| Lang. | English |
| Media | digital |
| File format | docx; pptx |
| Province | New Brunswick |
| NTS | 21G/15; 21J/02 |
| Area | Fredericton |
| Lat/Long WENS | -66.7972 -66.5500 46.0250 45.9000 |
| Subjects | hydrogeology; Nature and Environment; Science and Technology; Health and Safety; floods; mapping techniques; modelling; software; Hazus; Methodology; Risk assessment; Buildings; Economic
impact |
| Illustrations | tables; histograms; plots; screen captures |
| Program | Public Safety Geoscience Quantitative risk assessment project |
| Released | 2015 04 01 |
| Abstract | Conventional knowledge of the flood hazard alone (extent and frequency) is not sufficient for informed decision-making. The public safety community needs tools and guidance to adequately undertake flood
hazard risk assessment in order to estimate respective damages and social and economic losses. While many complex computer models have been developed for flood risk assessment, they require highly trained personnel to prepare the necessary input
(hazard, inventory of the built environment, and vulnerabilities) and analyze model outputs. As such, tools which utilize open-source software or are built within popular desktop software programs are appealing alternatives. Eva-Risk 2 (ER2),
recently developed based on the standard methodology applied in U.S.FEMA's Hazus-Flood software, runs loss assessment analysis in a Microsoft Excel spreadsheet. User input is limited to a handful of drop-down menus utilized to describe the building
type, age, and occupancy and the expected water level. Respective depth damage curves and other vulnerability parameters have been imported from Hazus and are accessed in conjunction with user input to display exposure and estimated economic losses
related to the structure and the content of the building. Building types and occupancies representative of those most exposed to flooding in Fredericton (New Brunswick) were introduced and test flood scenarios were run. The algorithm was validated
against results from the Hazus-Flood model for the same building types and flood depths, indicating a narrow variation, within ±1.5% for damage to a structure, whereas for aggregate scenario over a dissemination area, the total damages (structure and
contents) variation was ±6%. |
| Summary | (Plain Language Summary, not published)
While many complex computer models have been developed for flood risk assessment, they require highly trained personnel to prepare the necessary input
(flood hazard, inventory of the built environment, and vulnerabilities) and analyze model outputs. As such, tools which utilize open-source software or are built within popular desktop software programs are appealing alternatives. Eva-Risk 2 (ER2),
recently developed based on the standard methodology applied in US FEMA's Hazus software, runs loss assessment analysis in a Microsoft Excel worksheet. |
| GEOSCAN ID | 313080 |
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