Citation: | TIAN Ye, YIN Ping, JIA Yonggang, LIU Jinqing, ZHU Yamei, CAO Ke, CHEN Xiaoying. Response of beach characteristics to typhoon “Yagi”: Evidence from Argus video images and on-site measurement[J]. Marine Geology & Quaternary Geology, 2020, 40(5): 201-210. doi: 10.16562/j.cnki.0256-1492.2019090601 |
Integrated analysis is carried out on the video images from the Argus monitoring station, topographic measurements from beach profiles and sediment particle size parameters obtained from the Nanhai Beach in Wendeng City, Shandong Province before and after the 14th Typhoon “Yagi” in 2018. Under the action of the typhoon, the upper part of the beach was eroded, the slope became steeper, the mean grain size decreased, and the sorting of sediments improved, whereas the lower part of the beach was depositional, the slope became gentler, particles coarsened, the sorting of sediments was getting poorer, and the shoreline receded for an average of 3.8 m. The Argus continuous observation video image data further suggests that under the action of typhoon, wave dominated the response of coastline and the cusp beach will develop in a rhythmic manner resulted from the uneven dissipation of wave energy on the beach after the breaking of strong waves caused by typhoon.
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Location map showing the monitoring system of Nanhai beach of Wendeng, Shandong province
Change of shoreline before and after Typhoon “Yagi”
Images at 10:00 am during typhoon “Yagi”
Changes of beach topography and sediment grain size frequency before and after typhoon “Yagi”
Topographic variation of beach profile near an Argus station before and after typhoon “Yagi”
Argus snap image showing the strong wave effect during typhoon
Impact of human activity on the beach near profile P01
C5 video images at different time