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Fly River
The Fly at , is the second longest river in Papua New Guinea, after the Sepik. The Fly is the largest river in Oceania, the largest in the world without a single dam in its catchment, and overall ranks as the 25th-largest river in the world by volume of discharge.〔(Fragmentation and Flow Regulation of the World’s Major River Systems )〕 It rises in the Victor Emanuel Range arm of the Star Mountains, and crosses the south-western lowlands before flowing into the Gulf of Papua in a large delta.
==Description==
The Fly flows mostly through the Western Province, though for a small stretch it forms the boundary between PNG and the Indonesia province of Papua. This section protrudes slightly to the west of the 141°E longitude line. To compensate for this slight gain in territory for PNG, the border south of the Fly River is slightly east of the 141°E longitude line. As part of this deal, Indonesia has the right to use the Fly River to its mouth for navigation.
The principal tributaries of the Fly are the Strickland and the Ok Tedi.
Close to its mouth, the flow of the Fly River encounters a tidal bore, where an incoming high tide pushes water upstream until the changing of the tide. The range of this tidal bore is still undocumented.〔p.159, Barrie R. Bolton. 2009. ''The Fly River, Papua New Guinea: Environmental Studies in an Impacted Tropical River System.'' Elsevier Science. ISBN 978-0444529640.〕
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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