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| Titel |
The 1988 glacial lake outburst flood in Guangxieco Lake, Tibet, China |
| VerfasserIn |
J.-J. Liu, Z.-L. Cheng, Y. Li |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1561-8633
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| Digitales Dokument |
URL |
| Erschienen |
In: Natural Hazards and Earth System Sciences ; 14, no. 11 ; Nr. 14, no. 11 (2014-11-20), S.3065-3075 |
| Datensatznummer |
250118754
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| Publikation (Nr.) |
 copernicus.org/nhess-14-3065-2014.pdf |
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| Zusammenfassung |
| The 1988 glacial lake outburst flood (GLOF) in Guangxieco Lake is studied
based on geomorphological evidence, interviews with local residents, field
surveys in 1990 and 2007, and satellite images from different years. The
findings are as follows. (1) The outburst event was caused by
two major factors, namely, intense pre-precipitation and persistent high
temperatures before the outburst and the low self-stability of the terminal
moraine dam as a result of perennial piping. (2) The GLOF, with the peak
discharge rate of 1270 m3 s−1, evolved along Midui Valley in the
following order: sediment-laden flow, viscous debris flow, non-viscous
debris flow, and sediment-laden flood, which was eventually blocked by
Palongzangbu River. (3) A comparison between the conditions during the
outburst in 1988 and the present conditions suggests a small possibility of
a future outburst unless drastic changes occur in landscape and
climate. Reconstructing the outburst conditions and the GLOF processes is
helpful in assessing a potential outburst in glacier lakes in Tibet. |
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