Tidal and wave modulation of rip current dynamics

Zhang, Yao; Xiao, H.; Qiu, Ting; Liu, Xunan; Sun, Yun; Xu, Guochun

doi:10.1016/j.csr.2022.104764

Cited by 4 publications

(3 citation statements)

References 40 publications

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“…These factors induce variations in wave breaking intensity, thereby significantly altering the rip currents' morphology over time and space. This observation aligns with findings from other rip current studies [12,13,26]. Moreover, the velocity of rip currents in the arc-shaped beach area increases with wave height; at a wave height of 0.75 m, it approximates to 0.5 m/s, rising to 0.8 m/s at a significant wave height of 2.5 m. Generally, rip current velocities in this region exceed 0.5 m/s, corroborating findings from Dudkowska et al's research [42].…”

Section: Effect Of Significant Wave Height and Peak Period On Rip Cur...supporting

confidence: 94%

“…Their work provided insights into the factors contributing to the disruption of rip current persistence due to changes in wave angles. Zhang et al [13] conducted research on bay and sandbar channel topography, which is particularly susceptible to rip current hazards, and they explored variations in rip currents under the influence of tides and wave modulation. Hu et al [14] assessed rip current hazards on Hailing Island, China, considering factors such as water depth, tidal level and sediment dynamics.…”

Section: Introductionmentioning

confidence: 99%

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Study on the Formation Characteristics and Disaster Mitigation Mechanisms of Rip Currents on Arc-Shaped Beach

Ji,

Xu,

Ren

et al. 2023

JMSE

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Rip currents are fast offshore currents generated during the breaking process of waves propagating nearshore, posing a potential life safety threat to coastal bathers. This study utilizes a Boussinesq phase-resolving model to investigate the formation mechanism of rip currents at Dadonghai Beach, based on its actual topography, and explores the characteristics of rip current formation under various wave conditions, with an emphasis on analyzing vortices, the mean water level and the spatial distribution of average velocity. The results indicate that rip current formation is significantly influenced by wave height and period. The increase in wave height and period results in more intense rip currents and higher water level fluctuations on arc-shaped beaches and on both sides of the bay, leading to complex vortex distributions. An increase in the angle of wave incidence hinders rip current formation in arc-shaped beach areas but is favorable to the generation of deflection rips on both sides of the bay. Furthermore, an increase in bottom friction inhibits rip current formation. When the water depth decreases in the channels, rip currents transition into longshore currents. The findings of this research offer valuable scientific insights into the formation mechanisms of rip currents and contribute to their prediction and prevention.

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Section: Effect Of Significant Wave Height and Peak Period On Rip Cur...supporting

confidence: 94%

Section: Introductionmentioning

confidence: 99%

Study on the Formation Characteristics and Disaster Mitigation Mechanisms of Rip Currents on Arc-Shaped Beach

Ji,

Xu,

Ren

et al. 2023

JMSE

View full text Add to dashboard Cite

show abstract

“…There are many mechanisms for the generation of rip currents, including topographycontrolled rip currents generated by sandbars, sharp-angled beaches, and submerged reefs, wave-controlled rip currents generated by 3D waves, intersecting waves and wave clusters [2,7]. Most of the current studies on rip currents have focused on the measurement of depth-averaged velocities [8][9][10][11][12][13][14][15][16] or surface velocities [17][18][19][20][21]. Studies on the former mostly use Doppler acoustic point velocity (ADV) to measure velocities 1/3 of the way to the bottom of the water, and those on the latter use float tracer techniques to obtain the velocity vector field at the surface of the water (circulating flow field).…”

Section: Introductionmentioning

confidence: 99%

Vertical Distribution of Rip Currents Generated by Intersecting Waves in a Sandbar–Groin Systems

Wang,

Zou,

Liu

et al. 2024

JMSE

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To analyze the impacts of groins, sandbars, and channels on the three-dimensional features of rip currents, we conducted experimental investigations on the vertical distribution of rip currents under intersecting waves along barred beaches with channels. This study employed ADV flow velocity measurements at two distinct locations: within channel and on a sandbar. The results indicate that in nodal sections within channel and on a sandbar, the rip head region manifests surface flow characteristics, characterized by high velocities near water surface. In a rip neck location, the vertical distribution of rip currents on a sandbar exhibits greater variability, whereas within channel, the distribution is more homogeneous. The vertical distribution of rip currents in nodal sections within channel aligns with the logarithmic distribution law. The vertical distributions of the alongshore velocity of rip currents display a consistent pattern of higher at the top and lower at the bottom. However, this pattern varies slightly depending on the wave period. The presence of groins influences the fluctuation characteristics of the alongshore velocity of rip currents by regulating the nearshore circulation system. This results in the alongshore velocity of rip currents in channel pointing towards the groin. In contrast, the alongshore velocity of rip currents on sandbar, situated farther away from groin, exerts a weaker effect on the alongshore velocity of a rip current.

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Flow characteristics of the rip current system adjacent to a coastal vertical structure for irregular waves

Xu,

Yan,

Zou

et al. 2024

Ocean Engineering

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Tidal and wave modulation of rip current dynamics

Cited by 4 publications

References 40 publications

Study on the Formation Characteristics and Disaster Mitigation Mechanisms of Rip Currents on Arc-Shaped Beach

Study on the Formation Characteristics and Disaster Mitigation Mechanisms of Rip Currents on Arc-Shaped Beach

Vertical Distribution of Rip Currents Generated by Intersecting Waves in a Sandbar–Groin Systems

Flow characteristics of the rip current system adjacent to a coastal vertical structure for irregular waves

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