| Duilong River | |
|---|---|
 Sketch map of the Duilong River and Doilungdêqên District | |
| Location | |
| Country | Tibet |
| Location | Damxung County, Doilungdêqên District, Lhasa |
| Physical characteristics | |
| Mouth | |
• coordinates | 29°37′11″N 91°00′39″E / 29.619711°N 91.010815°E |
| Length | 137 km (85 mi) |
| Basin size | 4,988 km2 (1,926 sq mi) |
| Basin features | |
| River system | Lhasa River |
The Duilong River, or Duilong Qu (Toelung, Tibetan: སྟོད་ལུང་ཆུ, Wylie: stod lung chu; Chinese: 堆龙河), is a right tributary of the Lhasa River, which it enters just below the city of Lhasa, Tibet, China. The river is about 137 kilometres (85 mi) in length. Water quality may be compromised by dissolved substances including arsenic from geothermal springs.