Qualla: Fly River

Fly River: Introduction

Thu, 09 Apr 2026 00:00:00 GMT

Photo credit CC BY-SA 3.0. It is named for a ship. In 1845, a British corvette called HMS Fly was surveying the western coast of the Gulf of Papua under the command of Francis Blackwood when her officers noted a great river mouth emptying into the sea. Blackwood's crew decided to call the river after the vessel that found it, and he proclaimed that a small steam-powered boat could travel far inland. In 1876 an Italian explorer named Luigi D'Albertis proved him right, pushing his little steamer Neva 900 kilometers into the interior of New Guinea — the farthest any European had ever travelled on the island. The Fly has carried that name, and that odd colonial baptism, ever since.

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Image: CC BY-SA 3.0

Fly River: A River Measured in Superlatives

Thu, 09 Apr 2026 00:00:00 GMT

Photo credit gailhampshire from Cradley, Malvern, U.K, CC BY 2.0. The Fly is the third longest river on the island of New Guinea, after the Sepik and the Mamberamo. Combined with its largest tributary the Strickland, the Fly-Strickland system is the longest river system of any island in the world. More remarkable still, by volume of discharge t...

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Image: gailhampshire from Cradley, Malvern, U.K | CC BY 2.0

Fly River: The Funnel of the Delta

Thu, 09 Apr 2026 00:00:00 GMT

Photo credit Plucas58, CC BY-SA 4.0. The delta of the Fly is a textbook example of tide-dominated geomorphology. Sedimentary geologists study it as a "type case" for interpreting ancient rock formations around the world. The entrance is more than 100 kilometers wide at the sea. Eleven kilometers upstream, at a point...

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Image: Plucas58 | CC BY-SA 4.0

Fly River: Life Along the Water

Thu, 09 Apr 2026 00:00:00 GMT

Photo credit gailhampshire from Cradley, Malvern, U.K, CC BY 2.0. The islands of the delta are low, swampy, and covered in mangroves and nipa palm. The estuary banks look much the same. Soils are thick, fertile alluvium, and the inhabited islands — Kiwai, Wabuda, and Domori among them — sustain communities that farm coconut palm, breadfruit, pl...

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Image: gailhampshire from Cradley, Malvern, U.K | CC BY 2.0

Fly River: A River Under Pressure

Thu, 09 Apr 2026 00:00:00 GMT

Photo credit David Hosea, CC BY 4.0. The Ok Tedi Mine, in the headwaters country near Mount Fubilan, has discharged roughly 70 million tonnes of untreated waste into the Ok Tedi tributary each year for decades. That sediment and its chemical load travel far down the Fly, and a thousand kilometers of river have been ...

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Image: David Hosea | CC BY 4.0

Fly River: From the Air

Thu, 09 Apr 2026 00:00:00 GMT

Photo credit Paul Hermans, CC BY-SA 3.0. From altitude, the Fly is unmistakable. Its gray-brown water spreads through the southwestern lowlands in a pattern of meanders and oxbow lakes, widening as it picks up the Strickland from the east. Near the headwaters you can see the paler tinge from the Ok Tedi confluence. Over...

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Image: Paul Hermans | CC BY-SA 3.0