Comprehensive Analysis of Sand Movement for Erosion and Deposition on the Near Coast of Jeju Hwasun Harbor

摘要

The most commonly adopted method to investigate the sediment transport trend is STA (sediment trend analysis) technique which utilizes the characteristics of grain size distribution on the bed.Typically,results from STA analysis represent qualitative features of sediment transport rather than quantitative aspects.This restricts from understanding the further details of actual sediment transport entirely.In this study,the erosion/deposition of seabed was analyzed around the coast of Hwasun Port in southwestern Jeju for the study of sand transport trend.As a means to complement the existing STA method,comprehensive investigations such as sand component analysis,particle size analysis,diving sand survey and gravity probing were conducted.The spatial grain size distribution of sand was analyzed through STA as well as the estimation of the origin (land,ocean) using the spatial distribution of the bottom sediment which can be achieved using collected sand samples.Analysis by each of these methods produced similarities in results for sand movement.Therefore,it can be deduced that comprehensive research adopting such various methods of investigation can be a great alternate method for the analysis of sand transport trend for areas without available numerical models or bathymetry data.