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Breaching Flow Slides and the Associated Turbidity Current

Environmental Fluid Mechanics Section, Faculty of Civil Engineering and Geosciences, Delft University of Technology, 2628 CN Delft, The Netherlands
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J. Mar. Sci. Eng. 2020, 8(2), 67; https://doi.org/10.3390/jmse8020067
Received: 6 December 2019 / Revised: 6 January 2020 / Accepted: 14 January 2020 / Published: 21 January 2020
This paper starts with surveying the state-of-the-art knowledge of breaching flow slides, with an emphasis on the relevant fluid mechanics. The governing physical processes of breaching flow slides are explained. The paper highlights the important roles of the associated turbidity current and the frequent surficial slides in increasing the erosion rate of sediment. It also identifies the weaknesses of the current breaching erosion models. Then, the three-equation model of Parker et al. is utilised to describe the coupled processes of breaching and turbidity currents. For comparison’s sake, the existing breaching erosion models are considered: Breusers, Mastbergen and Van Den Berg, and Van Rhee. The sand erosion rate and hydrodynamics of the current vary substantially between the erosion models. Crucially, these erosion models do not account for the surficial slides, nor have they been validated due to the scarcity of data on the associated turbidity current. This paper motivates further experimental studies, including detailed flow measurements, to develop an advanced erosion model. This will improve the fidelity of numerical simulations. View Full-Text
Keywords: flow slide; breaching; turbidity current; sediment entrainment; sediment pick-up function; erosion velocity flow slide; breaching; turbidity current; sediment entrainment; sediment pick-up function; erosion velocity
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Alhaddad, S.; Labeur, R.J.; Uijttewaal, W. Breaching Flow Slides and the Associated Turbidity Current. J. Mar. Sci. Eng. 2020, 8, 67.

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