Author(s): Xiaowei Cao; Peng Lu; Baosen Zhang; Guoyu Li; Zhijun Li
Linked Author(s): Zhijun Li, Peng Lu
Keywords: No keywords
Abstract: The sea ice draft is an important part of global water circulation, and it produces major impacts on the global climate change and polar region navigation. The river ice draft also produces major impacts on the river ice flood and engineering disaster prevention. The ice bottom morphology has an important influence on the flow field and velocity under ice. In order to study this relationship, the ice bottom morphology in the range of 10 m × 10 m and vertically flow velocities distribution under ice were measured in the Yellow River. The ice bottom morphology was measured via ground penetrating radar (GPR) technology and traditional borehole measurements. Applying high-frequency GPR (200 MHz) enables detailed surveying of variation in ice thickness, and get the ice bottom morphology. Using the borehole data to calculate radar propagation velocity in the ice enables improve the accuracy of GPR measurement results. The vertically flow velocities distribution under ice measured with an acoustic Doppler current profiler (ADCP) were survey from 6 boreholes. Using the data of GPR and ADCP enables discussing the influence of ice bottom morphology on the flow field and velocity under ice.
Year: 2018