Langqên Zangbo
Langqên Zangbo (Tibetan: གླང་ཆེན་གཙང་པོ, Wylie: glang chen gtsang po; Chinese: 朗钦藏布; pinyin: Lăngqīn Zàngbù) is a river in Ngari, Tibet, China. The name Langqên, Tibetan for "elephant", is because of a valley that resembles an elephant trunk. This river is the main source of the Sutlej, a tributary of Indus River. It enters India at Shipki La pass. The source is south of Gangdise Range, in Ngari Prefecture. Its course is mainly in the Zanda County. The river drains an area of 22,760 km2, and covers a length of 309 km. The drop in height is 3,256 m. Historically, the river was the centre of the Zhangzhung Kingdom until its fall in the 8th century AD.