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°03′00″N 120°04′01″E / 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

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]

Names

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.

Reservoir

The largest reservoir in Taiwan, Zengwen Reservoir, formed by Zengwen Dam, is located Located upstream of Zengwen River.^[5]

National Park

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]