Confluence of Ottawa and Gatineau Rivers, Canada45.4N 75.6W
This APM image shows the Ottawa River in the Canadian provinces of Ontario and Quebec. For most of its length, it now defines the border between these two provinces. The total length of the river is 1,271 kilometers (790 mi); it drains an area of 146,300 km2, 65% in Quebec and the rest in Ontario, with a mean discharge of 1,950 m3/s.
The river rises from its source in Lake Capimitchigama, in the Laurentian Mountains of central Quebec, and flows west to Lake Timiskaming, then southeast to Ottawa and Gatineau. Here, it can be seen passing between those two cities in the lower left quadrant. The Gatineau River can also be seen in that part of the image, flowing south to join the Ottawa River at the city of Gatineau, Quebec. From there, the Ottawa River continues its course, draining into the Lake of Two Mountains and the St. Lawrence River at Montreal.