As the country with the longest coastline in the world, Canada’s rivers drain to the Atlantic Ocean, Hudson Bay, Arctic Ocean, Pacific Ocean and Gulf of Mexico. Approximately 47 per cent of all the land in the world drains to the Atlantic Ocean. In Canada, the Atlantic directly drains the Saint Lawrence River, the Great Lakes basins and all the Maritime Provinces, including New Brunswick, Nova Scotia, Prince Edward Island, Newfoundland and Labrador. The Atlantic also drains most of South America (everything east of the Andes mountain range), northern Europe and the greatest portion of sub-Saharan Africa. The Arctic Ocean drains most of northern Canada and northern Russia. About 13 per cent of the world’s land drains to the Pacific Ocean, including much of western Canada. The Indian Ocean drains about 13 per cent of the world’s land, while the Southern Oceans drain the coastline regions of Antarctica (the interior of Antarctica does not drain any runoff water).
This interactive map showcases the various drainage areas of the Earth’s major oceans. Users can scroll across the map and select from the legend to illuminate specific drainage areas.