A limnimetric scale is a ruler, usually made of enamelled steel, that resists corrosion. They are generally attached by means of anchoring to existing infrastructures (bridge, quay, concrete wall) in order to ensure their durability. During periods of flooding, they allow municipalities to monitor and follow the rise in river levels. Purpose: Locate the speed scales that have been installed on waterways in the various administrative regions of Quebec as part of the vigilance project.**This third party metadata element was translated using an automated translation tool (Amazon Translate).**

# #Données related to the monitoring of the 2019 floods in Quebec __Attention: water extent data is a near real-time interpretation of satellite data; they were produced in operational mode and are provided as is without exhaustive validation. The product may contain errors, especially in urban areas.__ ## #Liste of available data: * the monitoring of flood and landslide events between April 14, 2019 and May 28, 2019 in geolocated points (web service and download), * municipalities affected by flood events between April 14, 2019 and May 28, 2019, updated in real time with the event layer (web service); * the boundaries of extent of open waters generated by Natural Resources Canada, derived from data Radarsat 2 satellites or other radar satellites and those generated by Dromedaire Géo-Innovations, derived from Sentinel satellite data (web service and download), * flood limits for the Chaudière River sector derived from heliborne data (web service and download) * satellite images in the visible and near infrared on the most severely affected areas (web service and download when possible). * acquired oblique images on April 29 on the Ottawa River and the greater region of Montreal as part of the National Aerial Surveillance Program (link to the application of the Federal Government Operations Center) All data are also available on an interactive map based on IGO2. ## #Note: Radarsat-2 satellite acquisitions are planned in collaboration with Natural Resources Canada. Access to radar satellites from other Canadian space agencies is possible thanks to the activation of the International Space and Major Disaster Charter. It is activated by Public Safety Canada. The images obtained via the international charter are processed by the emergency geomatics services of Natural Resources Canada as soon as possible and then the open water polygons are disseminated as open data on Data Canada and on Data Quebec. Other optical or radar acquisitions may have been obtained by the Ministry of Public Security (MSP) from private suppliers. The Sentinel-1 and Sentinel-2 acquisitions released in open data by the European Space Agency (ESA) were processed by the firm Dromadaire-Geo-Innovations.**This third party metadata element was translated using an automated translation tool (Amazon Translate).**

# #Données linked to the monitoring of 2020 floods in Quebec ## #Liste of available data: * Location of flood events since April 2, 2020 (WMS web service); * Municipalities affected by flood events since April 2, 2020, updated in real time according to the presence of events (WMS web service); * Open water extent limits derived from Sentinel1 satellite images, generated by Dromedary Géo-Innovations (web service) WMS and download); * Sentinel-1 radar satellite image from 4 April 2020 processed by the firm Geo-Innovation camel that presents a map of the ice cover and possibly flooded areas (with or without ice) for the Chaudière River sector, where ice jams caused floods (resolution: 10m). Possible flooded areas (with or without ice) were identified from a comparative analysis between two Sentinel-1 images from 4 April and 23 March 2020 acquired in the same orbit; * Sentinel-2 satellite image from 8 April 2020 in the visible and near infrared in the visible and near infrared on the Lac Saint-Pierre sector (WMS web service and download). All data can be viewed on an interactive map based on IGO2. ## #Note: The Sentinel-1 and Sentinel-2 satellite images are distributed in open data by the European Space Agency (ESA) and were processed by the firm Dromadaire-Geo-Innovations.**This third party metadata element was translated using an automated translation tool (Amazon Translate).**

Polygons representing runoff water retention basins at a resolution of one meter in order to identify the physical particularities of the territory. Runoff is defined as the flow of rainwater to the surface of the ground that does not evaporate and does not seep into the ground when the capacity to hold water and vegetation is reached. The [Climate Plan 2020-2030] (https://portail-m4s.s3.montreal.ca/pdf/Plan_climat%2020-16-16-VF4_VDM.pdf) aims, among other things, to improve urban planning and regulatory tools. Montréal is committed to updating the climate change vulnerability analysis carried out as part of the 2015-2020 Agglomération de Montréal Climate Change Adaptation Plan and to integrating it into the next urban planning and mobility plan. The map of runoff water retention basins was produced in 2021, with the collaboration of the Department of Geography of the University of Quebec in Montreal, to calculate the vulnerability to heavy rains in the agglomeration of Montreal. The data can also be consulted on the [interactive map of vulnerabilities to climate hazards in the Montreal agglomeration] (https://experience.arcgis.com/experience/944e0b7104bd491591ccca829da24670/page/Page/).**This third party metadata element was translated using an automated translation tool (Amazon Translate).**

The purpose of this dataset is to locate the events related to the spring 2023 floods recorded by the Deputy Directorate General of Operations of the Ministry of Public Security. All data is available on an interactive map and available as WMS and WFS web services. > To monitor the status of watercourses live, please refer to the [Vigilance - Flood Monitoring] application (https://vigilance.geo.msp.gouv.qc.ca/) ### List of available data: * **List of available data: * **Open water polygons derived from satellite data**: extent limits of open water derived from radar satellite images**: extent limits of open water derived from radar satellite images**: extent limits of open water derived from radar satellite images**. Location of flood events since April 14, 2023**: points locating approximately the flood events recorded by the Operations Directorate of the Ministry of Public Security as of April 14, 2023 (derived from the dataset [Civil Security Events] (https://www.donneesquebec.ca/recherche/dataset/evenements-de-securite-civile)). * **Municipalities affected by flood events since April 14, 2023**: cartographic representation of municipalities affected by flooding events since April 14, 2023. * **Sentinel-2 satellite image**: satellite image covering sectors flooded and presented in the form of a colored compound using short band infrared, near infrared and red wavelengths. ## #Note: Satellite acquisitions for the RADARSAT Constellation Mission (RCM) are planned in collaboration with Natural Resources Canada. The images obtained are processed by the emergency geomatics services of Natural Resources Canada as soon as possible and then the open water polygons are distributed as open data on Data Canada and on Data Quebec. Other optical or radar acquisitions may have been obtained by the Ministry of Public Security (MSP) from private suppliers. The Sentinel-1 and Sentinel-2 acquisitions released in open data by the European Space Agency (ESA) were processed by the Dromedaire Géo-Innovations firm.**This third party metadata element was translated using an automated translation tool (Amazon Translate).**

The Ministry of Public Security (MSP) supports the development of knowledge of flood risks. In collaboration with Laval University and the Reunification of Quebec Basin Organizations, the MSP has developed a methodical and rigorous process for documenting floods that have an impact on the safety of people and essential goods. Thus, since 2017, the Ministry of Public Security (MSP) has been acquiring in certain cases data related to the water level reached when floods with proven consequences occur in southern Quebec. Maximum water levels are indicated by flood slopes. __What is a flood disaster? __ A flood (flood) is characterized by a rise in water on land that is usually dry, the reaching of a peak, then a descent of water (decline). Waste forms at the beginning of the flood when the water, when withdrawing, deposits materials that were in suspension or floating. These materials (mud, seeds, twigs and other debris) constitute flood wastes or flood plains. __Marking and surveying floodplains and water levels__ The marking of floodwaters and water levels takes place in the field shortly after the peak of the flood. The physical indices of the maximum water level reached (abandoned by the flood) or of the current water levels are identified and marked using permanent markers (markers). Afterwards, a land surveyor will precisely record the location and the altitude of the markers. __Point data set “Water levels during a flood"__ The point data set “Water levels during a flood” contains, for each marker, the date, altitude and location (measured by a land surveyor). There are two main types of observations made in the field: the natural flood defect (line of mud, seeds or trace of water) which indicates the maximum water level reached during the flood (called MAX) and the water level observed during the field visit (called CURRENT). The list of all attributes is provided in the dataset description sheet (Additional Information section). Despite the quality of the work carried out, the Ministry of Public Security cannot guarantee the absence of errors in the data. __Related datasets__ The “Flood reference” dataset produced by the Ministry of Public Security also contains maximum water levels reached during a flood. The link to this dataset is provided in the _Documentation_ section.**This third party metadata element was translated using an automated translation tool (Amazon Translate).**

Following the spring floods at the end of April 2017 on Lake of Two Mountains, Lake Saint-Pierre and the Rivières des Prairies and Mille-Îles that affected the regions of Montérégie, Laurentides, Mauricie, Montréal and Laval, geomatic data (e.g. satellite images) were captured to document these floods, which exceeded the recurrence of 100 years. At the peak of the flood, on May 8, Lac des Deux Montagnes reached a level of 24.78m at station 043108 of the Ministry of Sustainable Development, Environment and the Fight against Climate Change (MDDELCC), the Rivière des Prairies reached a flow of 3400 m3/s at station 0433/s at station 043301 of the MDDELCC and the Rivière des Mille-Îles reached 1081 m3/s at station 02OA0S 13 from Environment and Climate Change Canada (ECCC). on the Ottawa River, the flow at Carillon reached a peak of 8900 m3/s**This third party metadata element was translated using an automated translation tool (Amazon Translate).**

Polygons representing areas vulnerable to heavy rains, heat waves, destructive storms, droughts, and floods. Vulnerability corresponds to the propensity or predisposition of a system (community, infrastructure and natural environment) to suffer damage caused by the manifestation of a climatic hazard. It varies according to the nature, extent and pace of the evolution of the event as well as the variation in the climate to which the system is exposed, the sensitivity of this system and its capacity to adapt. The [Climate Plan 2020-2030] (https://portail-m4s.s3.montreal.ca/pdf/Plan_climat%2020-16-16-VF4_VDM.pdf) aims, among other things, to improve urban planning and regulatory tools. Montréal has thus committed to updating the climate change vulnerability analysis, including the heat island map, carried out as part of the 2015-2020 Agglomération de Montréal Climate Change Adaptation Plan and to integrating it into the next urban and mobility plan. In addition, in order to take stock of the evolution of the Climate Plan, the City of Montreal annually publishes an [accountability report] (https://montreal.ca/articles/plan-climat-montreal-objectif-carboneutralite-dici-2050-7613) of its 46 actions as well as its eight indicators, including the state of the various climate hazards illustrated by vulnerability maps. The data can also be consulted on the [interactive map of vulnerabilities to climate hazards in the Montreal agglomeration] (https://bter.maps.arcgis.com/apps/webappviewer/index.html?id=157cde446d8942d7b4367e2159942e05).**This third party metadata element was translated using an automated translation tool (Amazon Translate).**

Data on flood zones include mapping carried out as part of the mapping program of the Canada-Quebec Convention from 1976 to 2001, the Program for the determination of flood ratings from 2001 to 2004 (PDCC), as well as the mapping carried out after that date by the Centre d'expertise du Québec (CEH) and its various partners.**This third party metadata element was translated using an automated translation tool (Amazon Translate).**