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Evidence for Holocene megafloods down the tsangpo River gorge, Southeastern Tibet

Published online by Cambridge University Press:  20 January 2017

David R. Montgomery ,
Bernard Hallet ,
Liu Yuping ,
Noah Finnegan ,
Alison Anders ,
Alan Gillespie  and
Harvey M. Greenberg
David R. Montgomery*
Affiliation:
Quaternary Research Center, University of Washington, Seattle, WA 98195-1310, United States
Bernard Hallet
Affiliation:
Quaternary Research Center, University of Washington, Seattle, WA 98195-1310, United States
Liu Yuping
Affiliation:
Chengdu Institute of Geology and Mineral Resources, Chengdu, China
Noah Finnegan
Affiliation:
Quaternary Research Center, University of Washington, Seattle, WA 98195-1310, United States
Alison Anders
Affiliation:
Quaternary Research Center, University of Washington, Seattle, WA 98195-1310, United States
Alan Gillespie
Affiliation:
Quaternary Research Center, University of Washington, Seattle, WA 98195-1310, United States
Harvey M. Greenberg
Affiliation:
Quaternary Research Center, University of Washington, Seattle, WA 98195-1310, United States
*
*Corresponding author. Department of Earth and Space Sciences Quaternary Research Center, Box 351360, Seattle, WA 98195-1310. E-mail address:[email protected](D.R. Montgomery).
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Abstract

Lacustrine and alluvial terraces and sediments record the extent of at least two Holocene glacially dammed lakes immediately upstream of the Tsangpo River gorge at the eastern syntaxis of the Himalaya. The larger lake covered 2835 km2, with a maximum depth of 680 m and contained an estimated 832 km3 of water; the smaller lake contained an estimated 80 km3 of water. Radiocarbon dating of wood and charcoal yielded conventional radiocarbon ages of 8860 ± 40 and 9870 ± 50 14C yr B.P. for the higher set of lake terraces, and 1220 ± 40 and 1660 ± 40 14C yr B.P. for sediments from the lower terraces. Catastrophic failure of the glacial dams that impounded the lakes would have released outburst floods down the gorge of the Tsangpo River with estimated peak discharges of up to 1 to 5 X 106 m3 s–1. The erosive potential represented by the unit stream power calculated for the head of the gorge during such a catastrophic lake breakout indicates that post-glacial megafloods down the Tsangpo River were likely among the most erosive events in recent Earth history.

Keywords

Outburst floodsTsangpo RiverHimalayaNamche BarwaPaleolakes
Type
Short Paper
Information
Quaternary Research , Volume 62 , Issue 2 , September 2004 , pp. 201 - 207
Copyright
University of Washington

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References

Baker, V.R., (1981). Catastrophic Flooding: The Origin of the Channeled Scabland, Dowden. Hutchinson and Ross Inc, Stroudsburg, PA., 360 pp.Google Scholar
Bretz, J.H., (1923). The channeled scablands of the Columbia Plateau. Journal of Geology 31, 617–649.CrossRefGoogle Scholar
Burg, J.-P., Davy, P., Nievergelt, P., Oberli, F., Seward, D., Diao, Z., Meier, M., (1997). Exhumation during crustal folding in the Namche-Barwa syntaxis. Terra Nova 9, 2 53–56.CrossRefGoogle Scholar
Bürgisser, H.M., Gansser, A., Pika, J., (1982). Late Glacial lake sediments of the Indus valley area, northwestern Himalayas. Eclogae Geologicae Helvetiae 75, 51–63.Google Scholar
Cenderelli, D.A., (2000). Floods from natural and artificial dam failures. Wohl, E.E., Inland Food Hazards Cambridge University Press, New York., 73–103.CrossRefGoogle Scholar
Cenderelli, D.A., Wohl, E.E., (2001). Peak discharge estimates of glacial lake outburst floods and “normal” climatic floods in the Mount Everest region Nepal. Geomorphology 40, 57–90.CrossRefGoogle Scholar
Finkel, R.C., Owen, L.A., Barnard, P.L., Caffee, M.W., (2003). Beryllium 10 dating of Mount Everest moraines indicates a strong monsoon influence and glacial synchroneity throughout the Himalaya. Geology 31, 561–564.2.0.CO;2>CrossRefGoogle Scholar
Finlayson, D., Montgomery, D.R., Hallet, B.H., (2002). Spatial coincidence of rapid inferred erosion with young metamorphic massifs in the Himalayas. Geology 30, 219–222.2.0.CO;2>CrossRefGoogle Scholar
Hartshorn, D., Hovius, N., Dade, W.B., Slingerland, R.L., (2002). Climate driven bedrock incision in an active mountain belt. Science 297, 2036–2038.CrossRefGoogle Scholar
Montgomerie, T.G., (1868). Report of a route survey made by pundit, from Nepal to Lhasa, and thence through the upper valley of the Brahmaputra to its source. Journal of the Royal Geographical Society of London 38, 129–219.CrossRefGoogle Scholar
O'Connor, J.E., (1993). Hydrology, Hydraulics, and Geomorphology of the Bonneville Flood. Special Paper vol. 274, Geological Society of America, Boulder., 83 pp.Google Scholar
O'Connor, J.E., Baker, V.R., (1992). Magnitudes and implications of peak discharges from glacial Lake Missoula. Geological Society of America Bulletin 104, 179–267.2.3.CO;2>CrossRefGoogle Scholar
Pratt, B., Burbank, D.W., Heimsath, A., Ojha, T., (2002). Impulsive alluviation during early Holocene strengthened monsoons, central Nepal Himalaya. Geology 30, 911–914.2.0.CO;2>CrossRefGoogle Scholar
Stuiver, M., Reimer, P.J., Bard, E., Beck, J.W., Burr, G.S., Hughen, K.A., Kromer, B., McCormac, F.G., Plicht, J.V.D., Spurk, M., (1998). INTCAL98 Radiocarbon Age Calibration, 24,000-0 cal BP. Radiocarbon 40, 1041–1083.CrossRefGoogle Scholar
Wohl, E., Cenderelli, D., Kale, V.S., (1998). Flooding in the Himalaya Mountains, Flood Studies in India. Memoir-Geological Society of India, Bangalore., vol. 41, 77–99.Google Scholar
Zeitler, P.K., (2001). Erosion, Himalayan geodynamics, and the geomorphology of metamorphism. GSA Today 11, 4–9.2.0.CO;2>CrossRefGoogle Scholar
Zhang, D.D., (1998). Geomorphological problems of the middle reaches of the Tsangpo River, Tibet. Earth Surface Processes and Landforms 23, 889–903.3.0.CO;2-E>CrossRefGoogle Scholar