Ottawa RiverRegulationPlanning BoardCommission de planificationde la régularisationde la rivière des Outaouais

See the “River Conditions Forecast” message (Forecasts page) for details about flood risks. Read more

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Glossary

B C D F G H I P R T W
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Headwater

The source or upper tributaries of a river or stream, typically located in highland or mountainous areas.