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Usoi dam wave overtopping and flood routing in the Bartang and Panj Rivers, Tajikistan

Natural Hazards

By:
, , and
DOI: 10.1007/s11069-005-1923-9

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Abstract

The Usoi dam was created in the winter of 1911 after an enormous seismogenic rock slide completely blocked the valley of the Bartang River in the Pamir Mountains of southeastern Tajikistan. At present the dam impounds 17 million cubic meters of water in Lake Sarez. Flood volume and discharge estimates were made for several landslide generated floods that could overtop the dam. For landslide volumes of 200, 500, and 1,000 million cubic meters, estimated overtopping flood volumes were 2, 22, and 87 million cubic meters of water, respectively. Estimated peak discharge at the dam for these three flood scenarios were 57,000, 490,000, and 1,580,000 m3/s, based on triangular hydrographs of 70-, 90-, and 110-s durations, respectively. Flood-routing simulations were made for the three landslide-induced overtopping floods over a 530-km reach of the Bartang and Panj Rivers below the Usoi dam. A one-dimensional flow model using a Riemann numerical solution technique was selected for the analysis. For the 87 million cubic meter volume overtopping flood scenario, the peak flows were approximately 1, 100, 800, and 550 m3/s at locations 50, 100, and 150 km downstream of the dam respectively. ?? Springer 2006.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Usoi dam wave overtopping and flood routing in the Bartang and Panj Rivers, Tajikistan
Series title:
Natural Hazards
DOI:
10.1007/s11069-005-1923-9
Volume
38
Issue:
3
Year Published:
2006
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Natural Hazards
First page:
375
Last page:
390