Ou River
Oujiang River night.jpg
Ou River (Zhejiang) is located in Zhejiang
Ou River (Zhejiang)
Location of the mouth
Ou River (Zhejiang) is located in China
Ou River (Zhejiang)
Ou River (Zhejiang) (China)
Native nameOujiang  (Chinese)
Physical characteristics
SourceDaxi Brook
MouthWenzhou Bay
(East China Sea)
 • location
Wenzhou, Zhejiang, China
 • coordinates
27°55′10.8″N 120°54′00.8″E / 27.919667°N 120.900222°E / 27.919667; 120.900222Coordinates: 27°55′10.8″N 120°54′00.8″E / 27.919667°N 120.900222°E / 27.919667; 120.900222
Length388 km (241 mi)
Basin size18,028 km2 (6,961 sq mi)
 • average640.1 m3/s (22,600 cu ft/s)
Basin features
 • leftRuxi Brook, Xixi Brook, Nanxi River
 • rightXupu River

The Ou River (simplified Chinese: 瓯江; traditional Chinese: 甌江; pinyin: Ōujiāng) or Oujiang is the second-largest river in the Zhejiang province of eastern China. The river flows 388 kilometers (241 mi) before finally reaching the city of Wenzhou and emptying into the East China Sea, into which it discharges 20.2 billion cubic meters (710×10^9 cu ft) of water annually. Shen Jiang (慎江; 'Cautious River'), Jiang Yongjia (永嘉江), and Wenjiang (温江; 'Warm River') are all former names for this river.


The Ou River has a rich fish fauna. A 2010 survey recorded 60 different fish species, with goldfish, bagrid catfish, and Pseudobagrus tenuis being the most prolific in range.[a] Compared to a 1972 survey, 20 new species were recorded, including two alien species (Mozambique tilapia and largemouth bass); however, 34 species recorded in 1972 were absent in 2010, and overall fish density was lower.[1]

Goby Pseudorhinogobius aporus is endemic to the Ou River system: it is only known from a brook in the upper Ou River system.[2]


  1. ^ These three species were recorded at all monitoring stations.


  1. ^ Chen, Feng; Xian-fu Zhao; Jin-yong Zhao; Min Li (2012). "Investigation of fish resources in the Oujiang River and its protection strategy". Resources and Environment in the Yangtze Basin (in Chinese and English). 21: 934–939.
  2. ^ Zhong, Jun-Sheng; Wu, Han-Lin (1998). 中国东部 虎鱼科(Gobiidae)一新属新种, 无孔拟吻 虎鱼(Pseudorhinogobius aporus) [Pseudorhinogobius aporus, a new genus and species of gobiid fish from eastern China] (PDF). Journal of Fisheries of China (in Chinese and English). 22 (2): 148–153.