Impact of downstream lakes on dam break wave attenuation
Autor: | Majid Galoie, Artemis Motamedi, Jihui Fan |
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Rok vydání: | 2021 |
Předmět: |
021110 strategic
defence & security studies Atmospheric Science Hydrogeology Finite volume method 010504 meteorology & atmospheric sciences Discretization Attenuation Flow (psychology) 0211 other engineering and technologies Flux Geometry 02 engineering and technology 01 natural sciences Physics::Geophysics Vortex Computer Science::Graphics Earth and Planetary Sciences (miscellaneous) Geology 0105 earth and related environmental sciences Water Science and Technology Communication channel |
Zdroj: | Natural Hazards. 106:595-612 |
ISSN: | 1573-0840 0921-030X |
Popis: | In this study, the effect of downstream lakes or ponds on dam break flow was investigated. To do this, a robust finite volume method with Harten-Lax-van Leer contact surface Riemann’s solver technique for flux evaluation has been used. For space discretization, a triangular mesh grid was used and a complete software with mesh generator was developed. A reservoir with a long downstream channel was assumed, and many scenarios such as a single lake with various lengths, widths and positions along the channel and multiple consecutive lakes as symmetric and non-symmetric with respect to the channel centerline were considered. The numerical modeling of dam break flow along the channel showed that the downstream lake can decrease the speed and depth of the dam break wave front and the amount of this wave attenuation was very dependent on the storage volume of the lake and vortexes which were established in the lake. |
Databáze: | OpenAIRE |
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