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Coulee, or coulée (/ ˈ k uː l eɪ / or / ˈ k uː l iː /), [1] is any of various different landforms, all of which are kinds of valleys or drainage zones. The word coulee comes from the Canadian French coulée, from French couler 'to flow'.
Watersheds of North America are large drainage basins which drain to separate oceans, seas, gulfs, or endorheic basins. There are six generally recognized hydro-logical continental divides which divide the continent into seven principal drainage basins spanning three oceans ( Arctic , Atlantic and Pacific ) and one endorheic basin.
The oceans drain approximately 83% of the land in the world. The other 17% – an area larger than the basin of the Arctic Ocean – drains to internal endorheic basins. There are also substantial areas of the world that do not "drain" in the commonly understood sense.
Canada covers 9,984,670 km 2 (3,855,100 sq mi) and a panoply of various geoclimatic regions, of which there are seven main regions. [9] Canada also encompasses vast maritime terrain, with the world's longest coastline of 243,042 kilometres (151,019 mi). [20] The physical geography of Canada is widely varied.
The Kootenays are more or less defined by the Kootenay Land District, though some variation exists in terms of what areas are or are not a part.The strictest definition of the region is the drainage basin of the lower Kootenay River from its re-entry into Canada near Creston, through to its confluence with the Columbia at Castlegar (illustrated by a, right).
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The average temperature now for the Yukon River Basin is approximately 30 °C (86 °F) in the summer and −40 °C (−40 °F) in the winter. [7] However, the region has some of the most extreme temperature changes for an area that is located in a continental zone. [7] [8]