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http://dx.doi.org/10.9765/KSCOE.2019.31.6.485

Automatic Detection and Analysis of Rip Currents at Haeundae Beach using X-band Marine Radar  

Oh, Chanyeong (Institute of Construction & Environmental Research Handong Global University)
Ahn, Kyungmo (School of Spatial Environment System Engineering, Handong Global University)
Cheon, Se-Hyeon (Department of Ocean, Earth and Atmospheric Sciences, Old Dominion University)
Publication Information
Journal of Korean Society of Coastal and Ocean Engineers / v.31, no.6, 2019 , pp. 485-492 More about this Journal
Abstract
The observation system has been developed to investigate the rip currents at Haeundae beach using X-band marine radar. X-band radar system can observe shape, size, and velocity of rip currents, which is difficult to obtain through field observation by conventional device. Algorithms which automatically detect locations, shapes, and magnitudes of rip currents were developed using time averaged X-band radar sea clutter images. X-band sea clutter images are transformed through 3D FFT into 2D wave number spectrum and frequency spectrum. Rip current velocities were estimated using differences in wave-number spectra and wave frequency spectra due to Doppler shift. The algorithm was verified by drift experiments. At Haeundae beach, the radar system exactly located the rip currents and found to be sustained for 1-2 days at fixed locations.
Keywords
rip current; X-band RADAR; remote sensing; Haeundae beach; image processing;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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