Characterization of the banks of the fluvial part of the St. Lawrence and analysis of the evolution of hydro-climatic factors influencing erosion and flooding hazards

Characterization of the banks of the fluvial part of the St. Lawrence and analysis of the evolution of hydro-climatic factors influencing erosion and flooding hazards As part of measure 2.6 of the 2013-2020 Action Plan on Climate Change, the MELCC funded two projects specific to the St. Lawrence river section and aimed at supporting municipalities facing erosion and flooding hazards. The team from the Marine Geosciences Laboratory of the Department of Geography at Laval University has set up a geospatial information base that is essential for assessing the risks associated with the erosion of the banks of the St. Lawrence fluvial section. The user will be able to find (i) the cartography of the shoreline classification (types of banks and their artificialization), (ii) the degradation conditions of artificial structures and (iii) the erosion status of natural or artificial segments. The sectors most vulnerable to erosion have also been mapped and documented by image quality sheets. These sheets describe the characteristics of the shoreline and the main natural geomorphological processes (currents, ice, etc.) and human processes (shoreline, water level management) associated with shoreline erosion for these sensitive areas, in order to better represent local dynamics. Geospatial data associated with shoreline mapping, quality sheets, and the project report, which includes a description of the methodology and results, are available for download. The second project is led by Ouranos and aims to reduce vulnerability to flooding and erosion associated with climate change for communities bordering the fluvial section of the St. Lawrence. The user will be able to consult two reports resulting from this project: a. Technical report on future trends in the main hydro-climatic factors that influence natural flood risks and bank erosion processes along the fluvial section of the St. Lawrence. The objectives of this report are to draw a portrait of these hazards, covering both the recent past and future projections (2050 and 2080). These factors range from large-scale phenomena, such as the spring flood of the St. Lawrence River or marine elevation, to local phenomena such as the freeze-thaw processes that affect cliffs and clay microcliffs. b) Summary of the needs mentioned by actors in regional consultation tables (TCR) to adapt shoreline communities to the risks of shoreline erosion and flooding. This report presents a portrait of the participants of the four workshops organized in the fall of 2018, the approach used for the consultation, and a summary of the needs expressed. The lists of participants and the detailed reports of each workshop are also annexed to this document. The TCRs consulted during these workshops are those of Haut-Saint-Saint-Laurent — Greater Montreal, Lake Saint-Pierre, the river estuary and the TCR of Québec.**This third party metadata element was translated using an automated translation tool (Amazon Translate).** 2023-03-15 Government and Municipalities of Québec donnees.ouvertes@environnement.gouv.qc.ca Form DescriptorsNature and EnvironmentScience and Technology Characterization of shorelines - TCR Lac Saint-PierreFGDB/GDB ftp://ftp.mddelcc.gouv.qc.ca/DONNEES_OUVERTES/Caract_berges_saint_laurent/FGDB/CaractBerges_TCRLSP_UL_Mars2020.zip Characterization of shorelines - TCR de QuébecFGDB/GDB ftp://ftp.mddelcc.gouv.qc.ca/DONNEES_OUVERTES/Caract_berges_saint_laurent/FGDB/CaractBerges_TCRQC_UL_Mars2020.zip Characterization of shorelines - TCR Haut-Saint-Laurent and Greater MontrealFGDB/GDB ftp://ftp.mddelcc.gouv.qc.ca/DONNEES_OUVERTES/Caract_berges_saint_laurent/FGDB/CaractBerges_TCRHSLGM_UL_Mars2020.zip Characterization of banks - TCR de l'Estuaire fluvialFGDB/GDB ftp://ftp.mddelcc.gouv.qc.ca/DONNEES_OUVERTES/Caract_berges_saint_laurent/FGDB/CaractBerges_TCREF_UL_Mars2020.zip Original metadata (https://www.donneesquebec.ca)HTML https://www.donneesquebec.ca/recherche/fr/dataset/8301c7ed-6b27-4319-9150-435246634b90 Fact sheets of sites vulnerable to erosion - TCR Lac Saint-PierreJPG ftp://ftp.mddelcc.gouv.qc.ca/DONNEES_OUVERTES/Caract_berges_saint_laurent/Fiches/TCRLSP/ Fact sheets of sites vulnerable to erosion - TCR de QuébecJPG ftp://ftp.mddelcc.gouv.qc.ca/DONNEES_OUVERTES/Caract_berges_saint_laurent/Fiches/TCRQC/ Fact sheets of sites vulnerable to erosion - TCR du Haut-Saint-Laurent et du Grand-MontréalJPG ftp://ftp.mddelcc.gouv.qc.ca/DONNEES_OUVERTES/Caract_berges_saint_laurent/Fiches/TCRHSLGM/ Fact sheets of sites vulnerable to erosion - TCR de l'Estuaire fluvialJPG ftp://ftp.mddelcc.gouv.qc.ca/DONNEES_OUVERTES/Caract_berges_saint_laurent/Fiches/TCREF/ Characterization of shorelines - TCR Lac Saint-PierreKMZ ftp://ftp.mddelcc.gouv.qc.ca//DONNEES_OUVERTES/Caract_berges_saint_laurent/kmz/CaractBerges_TCRLSP_UL_Mars2020.kmz Characterization of shorelines - TCR de QuébecKMZ ftp://ftp.mddelcc.gouv.qc.ca/DONNEES_OUVERTES/Caract_berges_saint_laurent/kmz/CaractBerges_TCRQC_UL_Mars2020.kmz Characterization of the TCR shorelines of Haut-Saint-Laurent and Greater MontrealKMZ ftp://ftp.mddelcc.gouv.qc.ca/DONNEES_OUVERTES/Caract_berges_saint_laurent/kmz/CaractBerges_TCRHSLGM_UL_Mars2020.kmz Characterization of banks - TCR de l'Estuaire fluvialKMZ ftp://ftp.mddelcc.gouv.qc.ca/DONNEES_OUVERTES/Caract_berges_saint_laurent/kmz/CaractBerges_TCREF_UL_Mars2020.kmz Characterization of the banks of the fluvial part of the St. LawrencePDF https://www.donneesquebec.ca/recherche/dataset/8301c7ed-6b27-4319-9150-435246634b90/resource/a5d514c3-9356-40f5-9362-35967808be9b/download/caracterisationbergesulmars2020.pdf Summary of the needs mentioned by the actors of the regional consultation tables (TCR) to adapt riparian communities to the risks of bank erosion and floodingPDF https://www.donneesquebec.ca/recherche/dataset/8301c7ed-6b27-4319-9150-435246634b90/resource/12b4ac03-eb1e-4973-9c27-cf02669a118e/download/synthesebesoinscommunautesouranosmars2020.pdf Technical report on future trends in the main hydro-climatic factors that influence natural flood risks and bank erosion processes along the fluvial section of the St. LawrencePDF https://www.donneesquebec.ca/recherche/dataset/8301c7ed-6b27-4319-9150-435246634b90/resource/50bebc3a-0d4f-4e7a-a34c-3d41e334fd50/download/rondeaugenesse2020impactdesccsurhydroclimatsaint-laurent.pdf

As part of measure 2.6 of the 2013-2020 Action Plan on Climate Change, the MELCC funded two projects specific to the St. Lawrence river section and aimed at supporting municipalities facing erosion and flooding hazards. The team from the Marine Geosciences Laboratory of the Department of Geography at Laval University has set up a geospatial information base that is essential for assessing the risks associated with the erosion of the banks of the St. Lawrence fluvial section. The user will be able to find (i) the cartography of the shoreline classification (types of banks and their artificialization), (ii) the degradation conditions of artificial structures and (iii) the erosion status of natural or artificial segments. The sectors most vulnerable to erosion have also been mapped and documented by image quality sheets. These sheets describe the characteristics of the shoreline and the main natural geomorphological processes (currents, ice, etc.) and human processes (shoreline, water level management) associated with shoreline erosion for these sensitive areas, in order to better represent local dynamics. Geospatial data associated with shoreline mapping, quality sheets, and the project report, which includes a description of the methodology and results, are available for download. The second project is led by Ouranos and aims to reduce vulnerability to flooding and erosion associated with climate change for communities bordering the fluvial section of the St. Lawrence. The user will be able to consult two reports resulting from this project: a. Technical report on future trends in the main hydro-climatic factors that influence natural flood risks and bank erosion processes along the fluvial section of the St. Lawrence. The objectives of this report are to draw a portrait of these hazards, covering both the recent past and future projections (2050 and 2080). These factors range from large-scale phenomena, such as the spring flood of the St. Lawrence River or marine elevation, to local phenomena such as the freeze-thaw processes that affect cliffs and clay microcliffs. b) Summary of the needs mentioned by actors in regional consultation tables (TCR) to adapt shoreline communities to the risks of shoreline erosion and flooding. This report presents a portrait of the participants of the four workshops organized in the fall of 2018, the approach used for the consultation, and a summary of the needs expressed. The lists of participants and the detailed reports of each workshop are also annexed to this document. The TCRs consulted during these workshops are those of Haut-Saint-Saint-Laurent — Greater Montreal, Lake Saint-Pierre, the river estuary and the TCR of Québec.This third party metadata element was translated using an automated translation tool (Amazon Translate).

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