Yenisey river：Yenisey River

The river begins at the city of Kyzyl[1] in the republic of Tyva[2] (Tuva), Russia, at the confluence[3] of its headstreams—the Great (Bolshoy) Yenisey, or By-Khem, which rises on the Eastern Sayan Mountains[4] of Tyva, and the Little (Maly) Yenisey, or Ka-Khem, which rises in the Darhadïn Bowl of Mongolia[5]. From the confluence the Yenisey River runs for 2,167 miles (3,487 km), mainly along the border between eastern and western Siberia, before emptying into the icy Kara Sea[6]. If the Great Yenisey is considered the source, then the river is 2,540 miles (4,090 km) long. The headwaters of the Selenga (Selenge) River[7], which rise in western Mongolia and flow through Lake Baikal[8] (the world’s deepest freshwater lake) into the Angara[9] tributary of the Yenisey, may, however, be considered the river’s ultimate source. With the inclusion of the Selenga, the Yenisey is 3,442 miles (5,539 km) long and drains a basin that, at 996,000 square miles (2,580,000 square km), is the seventh...