| Autor: |
Kurovskaia, V. A., Chernomorets, S. S., Krylenko, I. N., Vinogradova, T. A., Dokukin, M. D., Zaporozhchenko, E. V. |
| Předmět: |
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| Zdroj: |
Water Resources; Feb2022, Vol. 49 Issue 1, p58-68, 11p |
| Abstrakt: |
Three likely scenarios of debris flow development in the valley of the Gerkhozhan-Su river are discussed: (I) the passage of a debris flow comparable with that in 2017; (II) a shift of Buzulgan rockslide and the formation of a rock-dammed lake with a dam 20 m high; (III) a catastrophic shift with the formation of a lake with a dam 40 m high. The characteristics of the flow in the area of potential debris flow site were calculated with the use of Yu.B. Vinogradov model of transport–shift debris flow formation. The horizontal distribution of flow velocity and depth in the valley was evaluated with the use of FLO-2D two-dimensional hydrodynamic model with different debris flow parameters. The sources of hydrological data were the hydrographs of debris flow waves derived from transport-shift model. The data on the relief for the transport-shift and hydrodynamic models were derived from processing images from an unmanned flying vehicle obtained by the authors during a reconnaissance study of the debris flow a month after its anomalous shift. The characteristics calculated under each scenario included the debris flow discharges at its source and at the head of the debris cone, flow density, and the spatial distribution of flow rate and depth. The maximal debris flow discharges at the head of the debris cone was 1203 for scenario I, 1662 for scenario II, and 3743 m3/s for scenario III. Under all scenarios, the debris flow will overflow over flume sides and inundation of a considerable part of Tyrnyauz Town. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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