LABORATORY MODELLING OF ICE JAM FLOODS ON THE LENA RIVER

摘要

Results of the hydraulic modeling of the ice jam formation on the Lena River scale model at Lensk are presented in this paper. Regularities of the formation of the water surface longitudinal profile within the river reach under study in relation with the ice jam location to the town, ice volume and water discharge are investigated in the experiments using the ice substitute material. Ice jam stability at various obstacles for ice run at various water discharge and means of the artificial impacts on the ice jam formation is evaluated. After – effects of the premature destruction of the ice accumulation and forms of the breakthrough wave, in case of the channel with the free of ice and unbroken ice surfaces are identified.