Umpqua River Oregon Active Channel 2005

The Umpqua River drains 12,103 square kilometers (4,673 square miles) in southwest Oregon before flowing into the Pacific Ocean at Winchester Bay near the city of...乌姆普夸河（Umpqua River）的流域面积达12103平方公里（4673平方英里），覆盖俄勒冈州西南部区域，随后在邻近某城市的温彻斯特湾注入太平洋。