HAZARD ASSESSMENT OF LAKE OUTBURST FLOOD IN THE DASHT RIVER VALLEY (PAMIR MOUNTAINS, TAJIKISTAN)
V.A. Iudina1, S.S. Chernomorets1, I.N. Krylenko1,2, I.V. Krylenko1, E.A. Savernyuk1, T.A. Vinogradova3, A.G. Guloimaidarov4, U.R. Pirmamadov4, Y.Kh. Raimbekov4
1Lomonosov Moscow State University, Moscow, Russia
2Water Problems Institute, Russian Academy of Sciences
3Research and Production Association Gidrotekhproekt LLC, Valdai, Russia
4Branch of the Aga Khan Agency for Habitat in the Republic of Tajikistan, Dushanbe, Tajikistan
Keywords: glacial lake, outburst, flood, debris flow, Pamir, Tajikistan, Gorno-Badakhshan Autonomous Region, FLOVI, FLO-2D
Abstract
The results of modeling the consequences of a hypothetical outburst flood from Lake Dasht (Tajikistan, the Shakhdara River basin) with the use of FLO-2D and FLOVI mathematical models are presented. The discharges of the outburst flood and debris flow and the increment of solid material in the debris flow have been obtained using the FLOVI program. The debris flow movement and accumulation in the valley have been simulated using the FLO-2D hydrodynamic model. The results indicate that the application of data obtained from the FLOVI program with transport-shift equation block in the FLO-2D model gives more correct characteristics of the debris flow, including the values of flow discharge, velocity, depth, and flooding area.
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