Markham River

Markham
The Markham in its entirety, looking due West from near its source, its river mouth in the lower left
Location of the Markham River
Location
CountryPapua New Guinea
Physical characteristics
SourceConfluence of Umi and Bitjia rivers
 • locationFinisterre Range
 • coordinates6°13′49.5372″S 146°10′59.2068″E / 6.230427000°S 146.183113000°E / -6.230427000; 146.183113000
 • elevation350 m (1,150 ft)
2nd sourceUmi River
 • coordinates5°59′47.9724″S 146°8′5.856″E / 5.996659000°S 146.13496000°E / -5.996659000; 146.13496000
 • elevation760 m (2,490 ft)
3rd sourceBitjia River
 • coordinates6°2′24.4932″S 146°3′31.8024″E / 6.040137000°S 146.058834000°E / -6.040137000; 146.058834000
 • elevation680 m (2,230 ft)
Mouth 
 • location
Huon Gulf
 • coordinates
6°44′20″S 146°58′5″E / 6.73889°S 146.96806°E / -6.73889; 146.96806
 • elevation
0 m (0 ft)
Length180 km (110 mi) (Markham–Umi 300 km)
Basin size13,264 km2 (5,121 mi2)
Discharge 
 • locationNear mouth
 • average546 m3/s (19,300 cu ft/s)
 • maximum4,000 m3/s (140,000 cu ft/s)
Basin features
ProgressionHuon Gulf (Solomon Sea)
River systemMarkham River
Tributaries 
 • leftUmi, Mutsing, Gorambampam, Leron, Rumu, Erap
 • rightBitjia, Wanton, Waffa, Watut, Wampit

The Markham River is a river in eastern Papua New Guinea. It originates in the Finisterre Range and flows for 180 km (110 mi) to empty into the Huon Gulf at Lae.