Warning: include(/home1/virtual/jkscoe/journal/func/recaptchalib.php): failed to open stream: No such file or directory in /home1/virtual/jkscoe/journal/journal/article_email.php on line 10
Warning: include(): Failed opening '/home1/virtual/jkscoe/journal/func/recaptchalib.php' for inclusion (include_path='.:/usr/local/pear/share/pear') in /home1/virtual/jkscoe/journal/journal/article_email.php on line 10
1Master Course, Dept. of Convergence study on the Ocean Science and Technology, Korea Maritime and Ocean University 2Assistant Professor, Dept. of Ocean Engineering, Korea Maritime and Ocean University 3Director, Haeyeon Engineering and Consultants Corp 4Professor, Dept. of Earth and Environmenal Engineering, Kangwon National University,346 Jungang-ro, Samcheok-si, Gangwon-do 25913, Korea
Corresponding author:
In Ho Kim ,Tel: +82-33-570-6571, Email: kimih@kangwon.ac.kr
Received: November 17, 2020; Revised: December 8, 2020. Accepted: December 8, 2020.
Share :
ABSTRACT
Crescentic sand bar in the coastal zone of eastern Korea is a common morphological feature and the rhythmic patterns exist constantly except for high wave energy events. However, four consecutive typhoons that directly and indirectly affected the East Sea of Korea from September to October in 2019 impacted the formation of longshore uniform sand bar and overall shoreline retreats (approx. 2 m) although repetitive erosion and accretion patterns exist near the shoreline. Widely used XBeach to predict storm erosions in the beach is utilized to investigate the morphological response to a series of storms and each storm impact (NE-E wave incidence). Several calibration processes for improved XBeach modeling are conducted by recently reported calibration methods and the optimal calibration set obtained is applied to the numerical simulation. Using observed wave, tide, and pre & post-storm bathymetries data with optimal calibration set for XBeach input, XBeach successfully reproduces erosion and accretion patterns near MSL (BSS = 0.77 (Erosion profile), 0.87 (Accretion profile)) and observed the formation of the longshore uniform sandbar. As a result of analysis of simulated total sediment transport vectors and bed level changes at each storm peak Hs, the incident wave direction contributes considerable impact to the behavior of crescentic sandbar. Moreover, not only the wave height but also storm duration affects the magnitude of the sediment transport. However, model results suggest that additional calibration processes are needed to predict the exact crest position of bar and bed level changes across the inner surfzone.
PDF Links
Full text via DOI
Download Citation 
E-Mail 
