Ottawa River drainage basin
The Ottawa River drainage basin is the drainage basin in northern North America where surface water empties into the Ottawa River and adjoining waters. Spanning an area of about , it is the 12th largest drainage basin in Canada, occupying the Canadian provinces of Ontario and Quebec. It accounts for about 11% of the total Saint Lawrence River drainage area.
Geography of Canada
Canada’s two longest rivers are the Mackenzie, which empties into the Arctic Ocean and drains a large part of northwestern Canada, and the St. Lawrence, which drains the Great Lakes and empties into the Gulf of St. Lawrence. The Mackenzie is over in length while the St. Lawrence is over in length. Rounding out the ten longest rivers within Canada are the Nelson, Churchill, Peace, Fraser, North Saskatchewan, Ottawa, Athabasca and Yukon rivers.