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| 1 | Scalar transport by propagation of an internal solitary wave over a slope-shelf显示文摘Internal solitary waves(ISWs)of depression are commonly found in the coastal environment and are believed to re-suspend sediments in coastal regions where the waves break.In this research,the direct numerical simulation is used to study the scalar transport induced by the ISWs of depression propagating over a slope-shelf topography.The scalar in this paper is considered to represent the concentrations of very fine suspended solids or pollutants.Vortices are observed from the numerical results at the bottom boundary layer on the slope during the ISW shoaling process,resulting in a scalar transport.All in cident ISWs of depression are observed to produce a waveform inversion on the shelf.The scalar transport from a slope to a shelf is the consequence of the combined vortices at the bottom boundary layer and the overturning of the ISWs of depression,and the latter was commonly ignored in previous studies.This study shows that the ISW-induced scalar transport consists of the following four stages:the slip transport,the wash transport,the vortex transport,and the secondary transport.A dimensionless time scales of the four stages are calculated,and the beginning times of the wash transport and the secondary transport are found to be uncorrelated with the slope gradients,taking values of 1.26,4,respectively. | Jin Xu Ling-ling Wang Hong-wu Tang Zhu Hai John James Reginald Williams | 2019 | Journal of Hydrodynamics2019，31，2： | 1 |
| 2 | Preface for special section on coastal flood risk显示文摘Global concerns about changes in the world’s climate have been well documented.The consequent impacts on coastal cities,agriculture,and coastal mariculture are difficult to quantify,but it is clear that there is a need for both better estimates of future climate and improved forecasting of storms and their impacts.Current designs for coastal flood defense schemes are based around the concept of exceedance probability and | Dominic Reeve | 2016 | Water Science and Engineering2016，9，1： | 0 |
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