Ottawa RiverRegulationPlanning BoardCommission de planificationde la régularisationde la rivière des Outaouais

Glossary

Drainage basin

Area of land that channels rainfall and snowmelt into a body of water or stream.

Freshet

Large increase of water discharged in a river during spring months due to snow melt and sometimes rainfall.

Reservoir

Area upstream of a dam where water is or can be stored for a long period of time (several weeks and sometimes months). A large reservoir can regulate (or alter) the flows in the downstream river section.

Run-of-river dam

Type of hydroelectric facility where no or little water is stored. A dam is built to cause water to pond upstream, ensuring the river water is high enough to enter the pipes leading to turbines. A run-of-river facility has little ability to regulate (or alter) the flows in the downstream river section.

Runoff

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

Tributary

A stream or river which flows into a larger lake or river, for example the Petawawa and Gatineau rivers.

Watershed

Area of land that channels rainfall and snowmelt into a body of water or stream.

2020-10-20 10:49:11