Ulan Moron
| Tuotuo River | |
|---|---|
The Ulan Moron or Tuotuo River | |
| Location | |
| Country | China |
| Physical characteristics | |
| Source | Tanggula Mountains |
| • location | Geladaindong Peak |
| • elevation | 6,621 m (21,722 ft) |
| Mouth | Tongtian River to a confluence with Dangqu River. |
| Length | 361.4 km (224.6 mi) |
| Basin size | 16,840 km2 (6,500 sq mi) |
| Discharge | |
| • average | 924 m3/s (32,600 cu ft/s) |
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The Ulan Moron (Mongolian: ᠤᠯᠠᠭᠠᠨᠮᠥᠷᠡᠨ, Ulaan Mörön, lit. "Red River"; Chinese: 乌兰木伦, p Wūlánmùlún), Mar Qu (Tibetan), or Tuotuo River (沱沱河, p Tuótuó Hé, lit. "Tearful River"; Tibetan: ཐོག་ཐོག་ཆུ་, ZYPY: Togtog Qu) is the second longest source of the Yangtze River after Dangqu River, with a total length of 361.4 km (224.6 mi) long, located in Qinghai province in the People's Republic of China.
The Ulan Moron begins as melt-off from the Geladandong glaciers and runs to a confluence with the Dangqu or Dam Chu River, where they form the Tongtian River, which subsequently becomes the Yangtze River. Although the Dangqu has been found to be the longest source of the Yangtze under the usual modern criteria, the Ulan Moron has been traditionally regarded as the main river and source. It belongs to the East China Sea watershed basin.