{"id":18782,"date":"2025-11-19T10:35:26","date_gmt":"2025-11-19T15:35:26","guid":{"rendered":"https:\/\/www.obvrdn.ca\/inondation\/"},"modified":"2026-04-02T14:51:06","modified_gmt":"2026-04-02T18:51:06","slug":"flooding","status":"publish","type":"page","link":"https:\/\/www.obvrdn.ca\/en\/flooding\/","title":{"rendered":"Flooding"},"content":{"rendered":"

Flooding is a natural phenomenon that recharges wetlands and enriches flood plains. However, when these areas are inhabited or developed, they can pose a risk\u00a0<\/span>to<\/span>\u00a0populations and infrastructure. In the Rivi\u00e8re du Nord watershed, several municipalities are affected, particularly during spring floods.<\/span><\/span>\u00a0<\/span><\/p>\n<\/div><\/div><\/div><\/div><\/div>

Flooding in at-risk areas<\/h3><\/h2><\/div>

The territory has areas particularly vulnerable to flooding, especially in the southern lowlands. Spring floods, intense rainfall, and rapid urbanization increase the frequency and severity of overflows, affecting residents, infrastructure, and natural environments.<\/p>\n

Initiatives such as INFO-Crue and the mapping of flood zones allow for better territorial planning and reduced risks.<\/p>\n<\/div>

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Did you know?<\/h4><\/div>
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Nearly 10% of the watershed territory is exposed to a flood risk according to the most recent flood zone maps from the MELCCFP (minist\u00e8re de l\u2019Environnement, de la Lutte contre les changements climatiques, de la Faune et des Parcs).<\/p>\n<\/div><\/div><\/div>

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Location within the territory<\/h3><\/h2><\/div>

The municipalities most vulnerable to flooding are mainly located in the St. Lawrence Lowlands, in the southern part of the Integrated Water Management Zone (ZGIE), where population density is high and several watercourses flow into the Rivi\u00e8re du Nord. In these flat areas, water flows more slowly, which can cause rivers to swell and overflow.<\/p>\n

Areas particularly at risk:<\/p>\n