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A platform for research: civil engineering, architecture and urbanism
Assessment of Adaptation Solutions to Floods with PCSWMM and a Multicriteria Analysis for a Very Small Watershed
Floods are of major concerns as they constitute a hazard for inhabitants of riparian areas. In Quebec, at least 80% of riparian municipalities undergo flooding and must find adequate solutions to diminish their impacts on both agricultural and urban sectors. Small watersheds are not spared by this problematic and often they do not have the resources to address it. Therefore, the aim of this study is to develop a methodology to evaluate different adaptation solutions for a municipality combining agricultural and urban areas in an ungauged small watershed subject to flooding. To do so, a detailed hydrologic and hydraulic model that suits the territory was designed using the PCSWMM software. This model was calibrated and validated using selected events from a one-year monitoring of water levels. The model was then used to test the adaptation solutions in a climate change context to better assess their resilience. A multi-criteria decision analysis (MCDA) with the PROMETHEE method considering socio-economic, environmental and technical criteria was then performed. The MCDA approach aims to prioritize the adaptation solutions according to the priorities of the onsite decision makers. The MCDA results show that the ranking is not so robust and may be subject to change according to decision makers preferences. However, the disconnection of gutters remained the most preferable option for all criteria. This study allowed to elaborate a robust methodology and target the needed data to conduct a flood study in a small ungauged watershed to prioritize adaptation solutions.
Assessment of Adaptation Solutions to Floods with PCSWMM and a Multicriteria Analysis for a Very Small Watershed
Floods are of major concerns as they constitute a hazard for inhabitants of riparian areas. In Quebec, at least 80% of riparian municipalities undergo flooding and must find adequate solutions to diminish their impacts on both agricultural and urban sectors. Small watersheds are not spared by this problematic and often they do not have the resources to address it. Therefore, the aim of this study is to develop a methodology to evaluate different adaptation solutions for a municipality combining agricultural and urban areas in an ungauged small watershed subject to flooding. To do so, a detailed hydrologic and hydraulic model that suits the territory was designed using the PCSWMM software. This model was calibrated and validated using selected events from a one-year monitoring of water levels. The model was then used to test the adaptation solutions in a climate change context to better assess their resilience. A multi-criteria decision analysis (MCDA) with the PROMETHEE method considering socio-economic, environmental and technical criteria was then performed. The MCDA approach aims to prioritize the adaptation solutions according to the priorities of the onsite decision makers. The MCDA results show that the ranking is not so robust and may be subject to change according to decision makers preferences. However, the disconnection of gutters remained the most preferable option for all criteria. This study allowed to elaborate a robust methodology and target the needed data to conduct a flood study in a small ungauged watershed to prioritize adaptation solutions.
Assessment of Adaptation Solutions to Floods with PCSWMM and a Multicriteria Analysis for a Very Small Watershed
Lecture Notes in Civil Engineering
Walbridge, Scott (editor) / Nik-Bakht, Mazdak (editor) / Ng, Kelvin Tsun Wai (editor) / Shome, Manas (editor) / Alam, M. Shahria (editor) / El Damatty, Ashraf (editor) / Lovegrove, Gordon (editor) / Coulombe, Audrey (author) / Martel, Jean-Luc (author) / Poulin, Annie (author)
Canadian Society of Civil Engineering Annual Conference ; 2021
Proceedings of the Canadian Society of Civil Engineering Annual Conference 2021 ; Chapter: 26 ; 321-334
2022-06-03
14 pages
Article/Chapter (Book)
Electronic Resource
English
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