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The Black River〔United States Geological Survey Hydrological Unit Code: 04-11-00-01-〕 is a tributary of Lake Erie, about 12 mi (19 km) long, in northern Ohio in the United States.〔(Columbia Gazetteer of North America entry )〕 Via Lake Erie, the Niagara River and Lake Ontario, it is part of the watershed of the St. Lawrence River, which flows to the Atlantic Ocean. The Black drains an area of 470 mi² (1217 km²).〔(Map of Ohio watersheds )〕 According to the Geographic Names Information System, the Black River was formerly named "Canesadooharie River" and "Riviere en Grys." (These two historical names were actually originally intended to refer to nearby rivers, instead of the Black River.〔The Wilderness Trail; Hanna (publ.1911 by Knickerbocker, NY)〕) ==Course== The Black River is formed in the city of Elyria by the confluence of its east and west branches: * The East Branch Black River is formed in northwestern Medina County by the confluence of two short tributaries, the East Fork Black River and the West Fork East Branch Black River. The East Fork flows southwardly past Lodi before turning northwestwardly, and the West Fork rises in northeastern Ashland County and flows generally eastwardly into Medina County; the two join about 1 mi (2 km) northwest of Lodi, and the East Branch then flows generally northwardly into Lorain County, past Grafton.〔DeLorme (1991). ''Ohio Atlas & Gazetteer''. Yarmouth, Maine: DeLorme. ISBN 0-89933-233-1〕 It drains an area of 222 mi² (575 km²).〔 * The West Branch Black River, about 30 mi (48 km) long,〔 rises in northern Ashland County and flows generally northeastwardly into Lorain County, past Rochester.〔 It drains an area of 174 mi² (451 km²).〔 From the confluence of the branches in Elyria, the Black River flows generally northwardly past Sheffield into the city of Lorain, where it enters Lake Erie at .〔 The mouth of the river forms part of the harbor of Lorain.〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Black River (Ohio)」の詳細全文を読む スポンサード リンク
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