Abstract
A new theoretical model is formulated to describe internal movement mechanisms of the sand ridges and sand waves based on the momentum equation of a solid-liquid two-phase flow under a shear flow. Coupling this equation with two-dimensional shallow water equations and wave reflection-diffraction equation of mild slope, a two-dimensional coupling model is established and a validation is carried out by observed hydrogeology, tides, waves and sediment. The numerical results are compared with available observations. Satisfactory agreements are achieved. This coupling model is then applied to the Dongfang 1-1 Gas Field area to quantitatively predict the movement and evolution of submarine sand ridges and sand waves. As a result, it is found that the sand ridges and sand waves movement distance increases year by year, but the development trend is stable.
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Foundation item: The National Natural Science Foundation of China under contract No.51079095; the Science Fund for Creative Research Groups of the National Natural Science Foundation of China under contract No. 51021004.
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Li, D., Wang, X., Wang, X. et al. Sediment mathematical model for sand ridges and sand waves. Acta Oceanol. Sin. 35, 141–149 (2016). https://doi.org/10.1007/s13131-016-0853-6
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DOI: https://doi.org/10.1007/s13131-016-0853-6