Red River (Asia)

The Red River, also known as the Hong River (traditional Chinese: 紅河; simplified Chinese: 红河; pinyin: Hóng Hé; Vietnamese: Sông Hồng; Chữ Nôm: 瀧紅) and Sông Cái (lit. "Mother River"; 瀧丐) in Vietnamese, and the Yuan River (元江, Yuán Jiāng) in Chinese, is a 1,149-kilometer (714 mi)-long river that flows from Yunnan in Southwest China through northern Vietnam to the Gulf of Tonkin. According to C. Michael Hogan, the associated Red River Fault was instrumental in forming the entire South China Sea at least as early as 37 million years before present. The name red and southern position in China are associated in traditional cardinal directions. The river is relatively shallow, and carries a lot of reddish silt along its way, appearing red brown in colour.

Red River
Hong River
Red River in Yuanyang County/Gejiu City, Yunnan
Red River and its tributaries.
Location
CountryChina, Vietnam
ProvincesYunnan Province (China), Lào Cai province, Yên Bái province, Phú Thọ province, Hanoi, Vĩnh Phúc province, Hưng Yên province, Hà Nam province, Thái Bình province, Nam Định province
Physical characteristics
Source 
  locationHengduan Mountains, Weishan, Dali, Yunnan, China
  elevation1,776 m (5,827 ft)
2nd source 
  locationTBD, Xiangyun, Dali, Yunnan, China
MouthBa Lạt
  location
(boundary between Tiền Hải and Giao Thủy)
  coordinates
20°14′43″N 106°35′20″E
  elevation
0 m (0 ft)
Length1,149 km (714 mi)
Basin size143,600 km2 (55,400 sq mi) 169,000 km2 (65,000 sq mi)
Discharge 
  locationRed River Delta, Gulf of Tonkin, Vietnam
  average4,300 m3/s (150,000 cu ft/s)
  minimum1,200 m3/s (42,000 cu ft/s) 700 m3/s (25,000 cu ft/s)
  maximum35,000 m3/s (1,200,000 cu ft/s) 9,500 m3/s (340,000 cu ft/s)
Discharge 
  locationViệt Trì
  average900 m3/s (32,000 cu ft/s)
Basin features
Tributaries 
  leftNanxi,
  rightĐà
Red River
Chinese name
Traditional Chinese紅河
Simplified Chinese红河
Alternative Chinese name
Chinese元江
Vietnamese name
Vietnamese alphabetSông Hồng
Sông Cái
Sông Thao
Nhị Hà, Nhĩ Hà
Hán-Nôm瀧紅
瀧丐
瀧洮
珥河
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