Application of UAV in Rip Current Investigations

Pujianiki NN, Antara ING, Temaja IGRM, Partama IGDY, Osawa T

Abstract


Cases of people dying from being swept away on the beach have been widely published on Bali news; this is because not many people know the dangers of rip currents on the beach. Lack of public knowledge about rip currents is caused by a lack of socialization and warning signs of rip currents on the beach. Rip currents are back currents formed by currents coming perpendicular to the shoreline and meeting the curved shoreline. This current can drag someone who is swimming out to sea. In this study, the existence of rip currents was investigated using aerial photographs or UAVs. The observation location was taken in an area that is often used by the Balinese Hindu community to carry out the Ngaben ceremony process. The UAV device was prepared to observe the rip current and measure its speed. Dye Tracer Test was also conducted to observe the movement of rip currents visually. Rip currents are characterized by calmness between rows of breaking waves. The average rip current speed is 0,29 m/s can also be determined by observing the UAV. The speed of this current is influenced by wave energy that propagates to the beach. The difference in bathymetry causes variations in wave height along the beach, and the rip current causes this. The results of this study can be used as an early warning system for people who carry out activities on the beach.

Keywords


UAV; rip current; Bali; beach.

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References


N. Cadwell, C. Houser, K. M. Arendt, “Ability of beach users to identify rip currents at Pensacola Beach, Florida†Natural Hazards vol.68, pp.1041–1056 DOI 10.1007/s11069-013-0673-3, 2013.

J. Pethick, An introduction to coastal geomorphology, London: Edward Arnold. vii + 260pp,1984.

M.Y. Herdian, “Identification of Rip Current in Ratu Port Sukabumi, West Javaâ€, Bachelor Thesis, Science ans Marine Technology Faculty, Institute of Agriculture Bogor, Sept., 2017.

Kusmanto, E. Setyawan, W. Budi, “Rip Current in Coastal Area of Pangandaran, West Java Indonesianâ€, Journal of Marine Sciences, Jun 2013.

W. Azhary, N. Awang and M.R.A. Hamid, “The Assesement of Rip Current at Kerachut Beach Using Hydrodynamic Modellingâ€, in Soft Soil Engineering International Conference 2015.

P.P.Ishak, B. Rochaddi, A Ismanto, “ Rip Current Study in South Beach Yogyakartaâ€, Journal of Oseanography Vol. 4, No. 4, pp. 670 – 679, 2015.

S. Rinto, H. Setiyono, B. Rochaddi, “Rip Current Study at Taman Beach, Pacitanâ€, Journal of Oseanography, Vo. 6, No. 4, pp. 639 – 649, 2017.

G. Benassai, P. Aucelli, G. Budillon, M. D. Stefano, D. D. Luccio, G. D. Paola, R. Montella, L. Mucerino, M. Sica, and M. Pennetta, “Rip current evidence by hydrodynamic simulations, bathymetric surveys and UAV observationâ€, Resech Gate, DOI: 10.5194/nhess-2017-53 at: https://www.researchgate.net/publication/314225527 March 2017

Brouwe,R.L., Matthieu A.S., Patrick, F.R., Fional, J,G., Reniers, J,H,M. and Jamie, H,M., “Surfzone Monitoring Using Rotary Wing Unmanned Aerial Vehiclesâ€, American Meteorological Society DOI: 10.1175/JTECH-D-14-00122.1, 2015

Stephen B Leatherman and Stephen P Leatherman, “Techniques for Detecting and Measuring Rip Currentsâ€, International Journal of Earth Science and Geophysics, ISSN: 2631-5033, Int J Earth Sci Geophys, 3:014, 2017

A.S. Woodget, P.E. Carbonneau, F. Visser, and I.P. Maddock, “Quantifying submerged fluvial topography using hyperspatial resolution UAS imagery and structure from motion photogrammetry,†Earth Surface Processes and Landforms, vol.40, pp.47-64, Aug. 2015.




DOI: http://dx.doi.org/10.18517/ijaseit.10.6.12620

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