Carte topographique Columbia River
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À propos de cette carte
Nom : Carte topographique Columbia River, altitude, relief.
Lieu : Columbia River, 97014, United States (45.54445 -124.07186 52.12484 -115.84933)
Altitude moyenne : 1 102 m
Altitude minimum : -2 m
Altitude maximum : 4 151 m
The Columbia's heavy flow and large elevation drop over a short distance, 2.16 feet per mile (40.9 cm/km), give it tremendous capacity for hydroelectricity generation. In comparison, the Mississippi drops less than 0.65 feet per mile (12.3 cm/km). The Columbia alone possesses one-third of the United States's hydroelectric potential. In 2012, the river and its tributaries accounted for 29 GW of hydroelectric generating capacity, contributing 44 percent of the total hydroelectric generation in the nation.
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