Identifying Rip Channels Along RK Beach, Visakhapatnam Using Video and Satellite Imagery Analysis

Borra, Sivaiah; Nair, T. M. Balakrishnan; Jospeh, Sudheer; Kumar, Surisetty V. V. Arun; Tallapragada, Sridevi; Harikumar, R.; Srinivas, K.; Yatin, G.; Gireesh, B.; Venkateswararao, K.; Venkateswarlu, Ch.; Anjaneyulu, A. S. R.; Prasad, K. Venkatesh

doi:10.1007/s12524-023-01666-4

Cited by 1 publication

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“…This is particularly evident during P5 (Figure 6). Rip current channels and rip current embayments are well known morphologies that have already been studied in Australia (Brander 1999, McCarroll et al 2016 and in other places of the world (Castelle et al 2015, Borra et al 2022, Wernette & Houser 2022. Based on the observations of this study, Figure 11 summarizes the behaviour of Stanwell Park Beach under the wave conditions of our study period.…”

Section: Discussionmentioning

confidence: 99%

Short-term dynamics of a high energy embayed beach: Stanwell Park, NSW, Australia

Asselot

Brander

2023

Ocean Coast. Res.

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The three-dimensional variability of the subaerial beach is examined for Stanwell Park Beach, New South Wales (NSW), Australia. This embayed environment has previously been studied over long time scales (decades), but not over shorter time scales (days, weeks). Embayed beaches experience rotation events during which opposite accretion and erosion patterns are observed at the extremities of the beach. To analyse this phenomenon, the beach is mapped with 10 Real-Time Kinematic Global Positioning System (RTK-GPS) surveys collected from 10th February 2016 to 14th May 2016. This study aims to examine short-term changes (days, weeks) to the morphology of the subaerial beach of Stanwell Park Beach and any factors that may influence its behaviours. We show that a short-time beach rotation event occurs over one month, caused by a large eastern swell. However, swell with a southern direction generates rip current channels on the subaerial beach face. During this particular event, the amount of sediment transported is lower than during beach rotation events. Furthermore, Stanwell Park Beach has two lagoons that can open to discharge water accumulated in these lagoons. We show that during heavy rainfall, the lagoons open, transporting sediment in surf zone and thus causing erosion. This study provides a clear demonstration of the sensitivity of embayed beaches to short-term variability in wave climate.

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