24°10′11.5″N 120°31′05.7″E / 24.169861°N 120.518250°E / 24.169861; 120.518250

Dadu River Wu River Black River
Sunset at the lower reaches of Wu River
Dadu River in Taiwan
Native name	大肚溪 (Chinese) 烏溪 (Chinese)
Location
Country	Taiwan
Physical characteristics
Source
• location	Central Mountain Range: western foothills of Hehuanshan
Mouth
• location	Taiwan Strait: Taichung City/Changhua County border
Length	124 km (77 mi)
Basin size	2,025.6 km2 (782.1 sq mi)

The Dadu River also called the Wu River, is a major river located in the Northwest of Taiwan. With a total length of 124 km (77 mi) it is sixth-longest river on the island. ^[1]

Names

The Dadu River is named after a former port near its mouth, now the Dadu District of Taichung.

It is also known as the Black River,^[2] a calque of its Hokkien name. The same name appears in English as the Wu River, the pinyin romanization of its Mandarin pronunciation. It received the name from the many black-winged birds that used to live along the river.^[3]

Geography

It flows through Taichung City, Changhua County, and Nantou County for 119 kilometers (74 mi).^[4][5][6] It is the 6th-longest river on Taiwan Island and the 4th-largest in terms of drainage area.^[4]