Breaching Flow Slides and the Associated Turbidity Current

Alhaddad, S.M.S.; Labeur, R.J.; Uijttewaal, W.S.J.

doi:10.3390/jmse8020067

Breaching Flow Slides and the Associated Turbidity Current

Title

Breaching Flow Slides and the Associated Turbidity Current

Author

Alhaddad, S.M.S. (TU Delft Environmental Fluid Mechanics)
Labeur, R.J. (TU Delft Environmental Fluid Mechanics)
Uijttewaal, W.S.J. (TU Delft Environmental Fluid Mechanics)

Date

2020

Abstract

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.

Subject

Breaching
Erosion velocity
Flow slide
Sediment entrainment
Sediment pick-up function
Turbidity current

To reference this document use:

http://resolver.tudelft.nl/uuid:c045e8fb-dbcf-472b-8ecd-706d81974bef

DOI

https://doi.org/10.3390/jmse8020067

ISSN

2077-1312

Source

Journal of Marine Science and Engineering, 8 (2)

Part of collection

Institutional Repository