Réduction du risque lié aux inondations du ruisseau Pratt, Coaticook, par modélisation hydrologique et mise en place d'un système d'alerte précoce
|Abstract:||The city of Coaticook, located to the south of the Estrie, is regularly subject to floods in its downtown area, whether in the summer due to major rainfalls, or in the winter due to icejams or combined rainfall-snow melt events. The Pratt River, main waterway of the study, is part of Coaticook’s territory. It is contained in a channel going through the city centre and is causing mainly material damages in case of overflow.Thus, the reduction of Pratt river’s flood-relied risk in the city of Coaticook represents the main goal of this study. To achieve so, a hydrologic model of Pratt river’s watershed was made, making it possible in a second step to understand and quantify the hydrologic hazard to which the town is subject. Multiple mitigation measures were studied and compared in order to be able to issue a final recommandation to the Town on which proposition to prioritize, which will finally be the construction of a retention pond upstream of the city centre. Lastly, a preliminary Early Warning System was developed on the Pratt River so as to be able to issue flow forecasts based on meteorological forecasts from a couple of climatic models, allowing the city to be warned when simulations indicate a flood downtown, helping to make appropriate decisions for the town authorities and to allocate more time for the preparation of such an event.|
|Document Type:||Mémoire de maîtrise|
|Open Access Date:||24 January 2020|
|Collection:||Thèses et mémoires|
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