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| Titel |
The 24 July 2008 outburst flood of Zyndan glacier lake, Ysyk-Köl region, Kyrgyzstan |
| VerfasserIn |
C. Narama, M. Duishonakonov, A. Kääb, K. Abdrakhmatov |
| Konferenz |
EGU General Assembly 2009
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 11 (2009) |
| Datensatznummer |
250024907
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| Zusammenfassung |
| On 24 July 2008, a glacial lake outburst flood (GLOF) occurred in the Zyndan River, the
Ysyk-Köl region, Kyrgyzstan. The flood killed three people and many livestock (horse,
sheep, fish), and caused heavy damage destroying a bridge, road, two homes, and crops of
agriculture fields. We researched the damege after two days of the GLOF. Using kinematic
GPS we measured the decrease of the glacier lake area, and the according drop of the
water level through the outburst. Glacier lake area of about 0.03 km2 reduced after
the collapse, more than 400,000 m3 of water were discharged. While the initial
flood discharge was relatively small, it increased substantially and was carrying
large boulders after 30 minutes. When spreading further downstream, the dirty
waters trapped eight people on islands between the stream branches. The flood
discharge continued to rise until midnight and began to decrease again around 3 AM
the next morning. The lake at 3771 m asl is located in front of the west Zyndan
glacier at the head of the Zyndan River basin. The glacier lake had developed rapidly
due to glacier shrinkage caused by recent atmospheric warming. Reasons for the
outburst included melting of dead ice inside the moraine that dammed the lake. The
villages downstream escaped heavy damage, because the main flood changed its
direction, away from the water reservoir along the village and towards another river. |
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