The Ngao River (Thai: แม่น้ำงาว, RTGSMaenam Ngao, pronounced [mɛ̂ː.náːm ŋāːw]) is a river of Thailand with its source in the Phi Pan Nam Range. It is a tributary of the Yom River, part of the Chao Phraya River basin.[1]

Ngao River
Ngao town-ngao river1793.JPG
Ngao River in Ngao town
Native nameแม่น้ำงาว
Location
CountryThailand
StatePhayao Province, Lampang Province, Phrae Province
CityNgao town
Physical characteristics
Source 
 ⁃ locationPhi Pan Nam Range, Phayao Province
 ⁃ elevation1,267 m (4,157 ft)
MouthYom River
 ⁃ location
Kaeng Suea Ten area, Song District, Phrae Province
 ⁃ coordinates
18°35′54″N 100°8′53″E / 18.59833°N 100.14806°E / 18.59833; 100.14806Coordinates: 18°35′54″N 100°8′53″E / 18.59833°N 100.14806°E / 18.59833; 100.14806
 ⁃ elevation
195 m (640 ft)
Length80 km (50 mi)
Basin size1,800 km2 (690 sq mi)

This river should not be confused with the Ngao River that is a tributary of the Yuam River (แม่น้ำยวม), part of the Salween basin, located to the west.[2]

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