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Journal of Marine Science and Application 2022年第3期21卷 184-192页

作者： Faerah Nasir Adina Roslee junainah zakaria Effi Helmy Ariffin Nor Aieni Mokhtar Faculty of Science and Marine Environment Universiti Malaysia Terengganu21030Kuala NerusTerengganuMalaysia Institute of Oceanography and Environment Universiti Malaysia Terengganu21030Kuala NerusTerengganuMalaysia

Shoreline change analysis frequently begins with feature identification through visual interpretation(proxy-based shoreline)or the intersection of a specific tidal zone(datum-based shoreline).Using proxy-based shoreline information,this study quantifies the distance between proxy-based and datum-based shoreline data,which is defined as the proxydatum *** study was conducted at meso-tidal beaches in Kuala Nerus,Terengganu,Malaysia,with morphodynamic responses to northeast and southwest *** high-water line(HWL)shoreline(proxy-based)was determined using ortho-rectified aerial images captured by an unmanned aerial vehicle(UAV).By contrast,the mean high-water(MHW)shoreline(datum-based)was determined using measured beach profiles adjusted with the Peninsular Malaysia Geodetic Vertical Datum(DTGSM).The theoretical proxy-datum bias was approximated using the best estimate(median)for the beach slope,wave height,and wave period from the estimated total water level(TWL)*** on the study,the recorded horizontal proxy-datum bias for the research area was up to 32 *** study also discovered that the theoretical assumption of the proxy-datum bias based on the TWL model yields values comparable to those of the measurements,with a narrower distinction in bias for steeper beach slopes than the obtained *** determined proxydatum bias value can benefit future shoreline change studies as it could be incorporated to either proxy-based shorelines by shifting the shoreline seaward or to datum-based shorelines by shifting the shoreline landward in order of the bias *** seasonal monsoon’s effect on beach profiles should be considered when calculating bias values and conducting potential shoreline change rate studies.

关键词： Shoreline evolution Datum Beach profile Unmanned aerial vehicle Monsoon

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