Rip Currents
نویسندگان
چکیده
Scientific T To examine the spatial and temporal variability of rip currents using remote video imaging techniques. T To quantify changes in nearshore circulation and topography in response to varying incident wave conditions at different time scales including; P wave groupiness (time scales of 1-10 minutes), P tidal modulation (time scales of 12h and 24 h) and P wave height fluctuations associated with passing weather systems (time scales of 2-5 days). T To develop a coupled hydrodynamic and sediment transport model to simulate the coupling between the nearshore circulation forced by the incident wave field, and the nearshore topography.
منابع مشابه
Numerical modelling of induced rip currents by discontinuous submerged breakwaters
Submerged breakwaters are one of the shore protective structures. Any discontinuity in these breakwaters causes changes on current parameters including speed and water surface profile. In this paper, discontinuous submerged breakwaters were modelled to investigate the changes in the wave and flow pattern.To investigate the phenomenon, three models including a shore with constant slope, a shore ...
متن کاملWave Breaking and Rip Current Circulation
This paper examines the effect of current-induced breaking on the modeling of wave breaking dissipation near rip currents. Simulations using a set of existing wave transformation models are compared to existing laboratory measurements made on a bar/channel topography in the presence of both strong and weak rip currents. The model/data comparisons demonstrate that existing models can effectively...
متن کاملEffects of wave-current interaction on rip currents
[1] The time evolution of rip currents in the nearshore is studied by numerical experiments. The generation of rip currents is due to waves propagating and breaking over alongshore variable topography. Our main focus is to examine the significance of wave-current interaction as it affects the subsequent development of the currents, in particular when the currents are weak compared to the wave s...
متن کاملRip Currents Onshore Submarine Canyons: NCEX Analysis
The long-term goals of this research are to understand the dynamics of rip currents generated by largescale variations in alongshore pressure gradients and wave forcing, and the impact of rip currents on nearshore bathymetry. These goals will be accomplished collaboratively using field observations obtained as part of the Nearshore Canyon Experiment (NCEX) held in the fall of 2003 and with nume...
متن کاملRip Currents Onshore Submarine Canyons
The long-term goals of this research are to understand the dynamics of rip currents generated by largescale variations in alongshore pressure gradients and wave forcing, and the impact of rip currents on nearshore bathymetry. These goals will be accomplished collaboratively using field observations and numerical models, and will be pursued as part of the Nearshore Canyon Experiment (NCEX) sched...
متن کاملDetecting and Visualizing Rip Current Using Optical Flow
Rip current are fast moving and narrow currents that are strongest near the beach. They are dangerous not only for novice but also experienced swimmers. Once caught in the current, the flow of the water pulls the person away from the beach. Many people in panic try to swim against the current and end up drowning due to exhaustion since these currents are usually faster than the speed at which o...
متن کامل