Academic Journal
Topography- and nightlight-based national flood risk assessment in Canada
| العنوان: | Topography- and nightlight-based national flood risk assessment in Canada |
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| المؤلفون: | Amin Elshorbagy, Anchit Lakhanpal, Bharath Raja, Serena Ceola, Alberto Montanari, Karl-Erich Lindenschmidt |
| سنة النشر: | 2017 |
| المجموعة: | Istituto Nazionale di Fisica Nucleare (INFN): Open Access Repository |
| مصطلحات موضوعية: | Natural Sciences and Engineering Research Council of Canada, EC, FP7, SP1-Cooperation, Environment (including Climate Change), European Commission |
| الوصف: | In Canada, flood analysis and water resource management, in general, are tasks conducted at the provincial level; therefore, unified national-scale approaches to water-related problems are uncommon. In this study, a national-scale flood risk assessment approach is proposed and developed. The study focuses on using global and national datasets available with various resolutions to create flood risk maps. First, a flood hazard map of Canada is developed using topography-based parameters derived from digital elevation models, namely, elevation above nearest drainage (EAND) and distance from nearest drainage (DFND). This flood hazard mapping method is tested on a smaller area around the city of Calgary, Alberta, against a flood inundation map produced by the city using hydraulic modelling. Second, a flood exposure map of Canada is developed using a land-use map and the satellite-based nightlight luminosity data as two exposure parameters. Third, an economic flood risk map is produced, and subsequently overlaid with population density information to produce a socioeconomic flood risk map for Canada. All three maps of hazard, exposure, and risk are classified into five classes, ranging from very low to severe. A simple way to include flood protection measures in hazard estimation is also demonstrated using the example of the city of Winnipeg, Manitoba. This could be done for the entire country if information on flood protection across Canada were available. The evaluation of the flood hazard map shows that the topography-based method adopted in this study is both practical and reliable for large-scale analysis. Sensitivity analysis regarding the resolution of the digital elevation model is needed to identify the resolution that is fine enough for reliable hazard mapping, but coarse enough for computational tractability. The nightlight data are found to be useful for exposure and risk mapping in Canada; however, uncertainty analysis should be conducted to investigate the effect of the overglow phenomenon on ... |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | English |
| Relation: | url:https://www.openaccessrepository.it/communities/itmirror; https://www.openaccessrepository.it/record/68620 |
| DOI: | 10.5194/hess-21-2219-2017 |
| الاتاحة: | https://www.openaccessrepository.it/record/68620 https://doi.org/10.5194/hess-21-2219-2017 |
| Rights: | info:eu-repo/semantics/openAccess ; http://www.opendefinition.org/licenses/cc-by |
| رقم الانضمام: | edsbas.F7CC3D25 |
| قاعدة البيانات: | BASE |
| DOI: | 10.5194/hess-21-2219-2017 |
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