Ottawa RiverRegulationPlanning BoardCommission de planificationde la régularisationde la rivière des Outaouais

INCREASING FLOOD RISK ALONG THE OTTAWA RIVER (Mattawa to the Montreal Region). See the River Conditions Forecast message that is updated daily. Read more

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Glossary

Runoff

The excess water, from precipitation or spring melt, which isn’t retained in the ground and flows into the surrounding streams.