The Zengwen River is the fourth longest river in Taiwan after the Zhuoshui River, Gaoping, and Tamsui, with a total length of about 146 km (91 mi). It flows through Tainan and Chiayi County.It is located in the southwestern part of the island. [1]
| Zengwen River | |
|---|---|
Zengwen River basin | |
| Native name | 曾文溪 (Chinese) |
| Location | |
| Country | Taiwan |
| Physical characteristics | |
| Source | |
| • location | Alishan, Chiayi County |
| • elevation | 2,609 m (8,560 ft) |
| Mouth | Taiwan Strait |
• location | Tainan |
• coordinates | 23.050°N 120.067°E / 23.050; 120.067 |
• elevation | 0 m (0 ft) |
| Length | 146 km (91 mi) |
| Basin size | 1,176.64 km2 (454.30 sq mi) |
| Discharge | |
| • average | 74 m3/s (2,600 cu ft/s) |
| Basin features | |
| Tributaries | |
| • left | Houku River |
| Zengwen River | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Chinese | 曾文溪 | ||||||||||||
| Postal | Tsengwen | ||||||||||||
| |||||||||||||

Zéngwén is the pinyin romanization of the Mandarin pronunciation of the river's Chinese name 曾文溪. The river was formerly known as the Tsan-bun[2][3] from the Hokkien pronunciation of the same name.
It was formerly known as the Taiwanfu[4] from a former name of Tainan, when it was the headquarters of Qing administration on the island as a district of Fujian Province.
The largest reservoir in Taiwan, Zengwen Reservoir, formed by Zengwen Dam, is located Located upstream of Zengwen River.[5]
Taijiang National Park encompasses parts of the Zengwen estuary as well as nearby coastal areas.[6] The endangered black-faced spoonbills come every winter as migrants and inhabit downstream near the estuary, where many other waterfowls are also found. A conservation area has been set up to protect the spoonbills.[7][8]