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Usoi Dam Wave Overtopping and Flood Routing in the Bartang and Panj Rivers, Tajikistan

Author

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  • John Risley
  • Joseph Walder
  • Roger Denlinger

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 m 3 /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 m 3 /s at locations 50, 100, and 150 km downstream of the dam respectively. Copyright Springer 2006

Suggested Citation

  • John Risley & Joseph Walder & Roger Denlinger, 2006. "Usoi Dam Wave Overtopping and Flood Routing in the Bartang and Panj Rivers, Tajikistan," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 38(3), pages 375-390, July.
    • Handle: RePEc:spr:nathaz:v:38:y:2006:i:3:p:375-390
    DOI: 10.1007/s11069-005-1923-9
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