Water levels during a flood (French, WFS)

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Publisher-reported update

2026-09-09

The Department of Homeland Security (MSI) supports the development of flood risk knowledge. In collaboration with Laval University and the Reunification of Quebec Basin Organizations, the MSI 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 Homeland Security (MSI) 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 overflows. __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 flood plains and water levels The marking of floodplains and water levels takes place on the ground shortly after the peak of the flood. The physical indices of the maximum water level reached…

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