Kyi River

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Template: Infobox River / Obsolete

The Lhasa He ( Tib. lha sa gtsang po, Tibetan: ལྷ་ས་གཙང་པོ, Chinese拉萨 河/拉萨 河, Pinyin LASA Hé ), also Gyi Qu or Kyi Chu ( Tib: sKyid chu, Tibetan: སྐྱིད ་ཆུ་. ) called, is a northern inlet of the Yarlung Zangbo River, the upper reaches of the Brahmaputra in Tibet, and rises in Nyainqentanglha Mountains in the Tibetan highlands.

The source of the Lhasa He is at a sharply melting glacier in 5290 m altitude in the central in Nyainqentanglha Mountains, approximately 15 km south-west of the highest peak ( 7117 m), about 30 km north of Yang Pacing, 15 km east of the pass Guring La ( 5972 m). The source was discovered by geologists and glaciologists Dieter Bremer Ortlam on 14 August 1989 geophysical and glaciological investigations.

The Lhasa River is approximately 395 km long. Significant inflows are from the north of Damchu ( Tib: ' dam chu, Tibetan: འདམ་ཆུ་, dang Qǔ当 曲. ), From the east and west of the Miggi Chu Chu the Tobing. The Lhasa River flows east of Qüxü in 3590 meters altitude below the Zangbo bridge of Lhasa, after the airport Gongkar Yarlung Zangbo in the.

The river runs along the tortuous places Lhünzhub ( 4065 m), Radreng Gömpa, Maizhokunggar ( 3750 m), Dagzê ( 3690 m), Lhasa ( 3650 m) and Qüxü ( 3590 m). The gradient of the source to the mouth 1600m, 1:25 or 4 %; However, in the lower reaches from Maizhokunggar only 1 % (at subglacial overdeepening ). The catchment area of ​​Lhasa River is about 26,000 km ².

Numerous documents - among other things U-shaped valleys, glacial pot - fields and cascades in the granite and Jurassic limestone far above the valley floor, from erratic boulders eg Jurassic lime on granite west of Lhasa or granite and gneiss on Jurassic limestone on the Ganden summit ( = Zhog Riwoqe, about 4500 m), moutonnées of Roches with glacier - Kritzen or mirrors and Luv-/Lee-Moränen in the field Gongkar - Lhasa - Ganden Yang Pacing - can a 2500 m powerful jungpleistozäne inland ice in the valleys of Lhasa River and the Yarlung Tsangpo are derived. A precise age dating is for the time being but still open ( probably one of the last two glacial periods ).

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