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Article: Geomorphological problems of the middle reaches of the Tsangpo River, Tibet

TitleGeomorphological problems of the middle reaches of the Tsangpo River, Tibet
Authors
Issue Date1998
PublisherJohn Wiley & Sons Ltd. The Journal's web site is located at http://www3.interscience.wiley.com/cgi-bin/jhome/2388
Citation
Earth Surface Processes And Landforms, 1998, v. 23 n. 10, p. 889-903 How to Cite?
AbstractThe middle reaches of the Tsangpo River consist of alternating sections of wide valleys and gorges. The wide valley sections have braided and anastomosing channels, gentle hydraulic gradients, thick alluvial deposits and low terraces. In contrast, the gorge sections exhibit single, straight and deeply entrenched meandering channels with steep hydraulic gradients, bare rock river beds and higher terraces. Several hypotheses have been used to explain these unusual fluvial landforms, but geologists, landform and sedimentary analyses along with dating information, suggest that the key could be the active faults across the river valley. All gorge sections are located on the upthrown side of active faults, which mainly occured in or after the Pliocene, whilst the wide valley sections appear on the downthrown side. The faulting blocked the river and caused the formation of palaeolakes, with thick deposits laid down behind the faults. Therefore, depositional wide valleys were formed and old terraces were buried. On these downthrown sides of the faults, braided and anastomosing channels have developed. On the upthrown sides, strong incision of the river occurred because of the changes of the local base levels and river gradients. As a result, deep gorges and deeply entrenched meandering channels formed in various lithologies. The terraces on the gorge slope indicate different stages of river incision and the related knick points appeared close to the local active faults. Rock resistance is only a minor influence on the alteration of valley forms and river gardients in this area.
Persistent Identifierhttp://hdl.handle.net/10722/86346
ISSN
2015 Impact Factor: 3.505
2015 SCImago Journal Rankings: 1.574
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorZhang, DDen_HK
dc.date.accessioned2010-09-06T09:15:43Z-
dc.date.available2010-09-06T09:15:43Z-
dc.date.issued1998en_HK
dc.identifier.citationEarth Surface Processes And Landforms, 1998, v. 23 n. 10, p. 889-903en_HK
dc.identifier.issn0197-9337en_HK
dc.identifier.urihttp://hdl.handle.net/10722/86346-
dc.description.abstractThe middle reaches of the Tsangpo River consist of alternating sections of wide valleys and gorges. The wide valley sections have braided and anastomosing channels, gentle hydraulic gradients, thick alluvial deposits and low terraces. In contrast, the gorge sections exhibit single, straight and deeply entrenched meandering channels with steep hydraulic gradients, bare rock river beds and higher terraces. Several hypotheses have been used to explain these unusual fluvial landforms, but geologists, landform and sedimentary analyses along with dating information, suggest that the key could be the active faults across the river valley. All gorge sections are located on the upthrown side of active faults, which mainly occured in or after the Pliocene, whilst the wide valley sections appear on the downthrown side. The faulting blocked the river and caused the formation of palaeolakes, with thick deposits laid down behind the faults. Therefore, depositional wide valleys were formed and old terraces were buried. On these downthrown sides of the faults, braided and anastomosing channels have developed. On the upthrown sides, strong incision of the river occurred because of the changes of the local base levels and river gradients. As a result, deep gorges and deeply entrenched meandering channels formed in various lithologies. The terraces on the gorge slope indicate different stages of river incision and the related knick points appeared close to the local active faults. Rock resistance is only a minor influence on the alteration of valley forms and river gardients in this area.en_HK
dc.languageengen_HK
dc.publisherJohn Wiley & Sons Ltd. The Journal's web site is located at http://www3.interscience.wiley.com/cgi-bin/jhome/2388en_HK
dc.relation.ispartofEarth Surface Processes and Landformsen_HK
dc.rightsEarth Surface Processes and Landforms. Copyright © John Wiley & Sons Ltd.en_HK
dc.titleGeomorphological problems of the middle reaches of the Tsangpo River, Tibeten_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0197-9337&volume=23&spage=889&epage=903&date=1998&atitle=Geomorphological+problems+of+the+Middle+reaches+of+the+Tsangpo+River,+Tibeten_HK
dc.identifier.emailZhang, DD:zhangd@hkucc.hku.hken_HK
dc.identifier.authorityZhang, DD=rp00649en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1002/(SICI)1096-9837(199810)23:10<889::AID-ESP907>3.0.CO;2-Een_HK
dc.identifier.scopuseid_2-s2.0-0032415029en_HK
dc.identifier.hkuros44409en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-0032415029&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume23en_HK
dc.identifier.issue10en_HK
dc.identifier.spage889en_HK
dc.identifier.epage903en_HK
dc.identifier.isiWOS:000076389600003-
dc.publisher.placeUnited Kingdomen_HK
dc.identifier.scopusauthoridZhang, DD=9732911600en_HK

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