COASTAL SEDIMENT TRANSPORT STUDY USING GIS IN KYUNGGI BAY,KOREA

摘要

Field study and numerical modeling approach have been conducted to study thernsediment transport in macro-tidal Kyunggi Bay in Korea. The area of the Kyunggi Bay isrnapproximately 20,000 square Km, where underwater sand mining has been conducted to supplyrnthe construction material to coastal cities in Korea. Approximately more than 19 million cubicrnmeter of underwater sand have been mined every year, leaving significant change in the bed form.rnAs part of environment impact assessment, we carry out a sediment transport study. The purposernof this study is to increase our ability to predict the horizontal and vertical dispersion of thernturbid plume in surface and bottom layers from the mining vessels, and to predict the recovery ofrnthe artificially deepened seabed. We have conducted a field experiment that is exclusively forrnthis study, including experimental underwater sand mining, and associated hydrodynamic andrnsedimentary processes in undisturbed area. Using the field data, we are doing comparative studyrnof numerical modeling. The numerical study demonstrates the applicability of the JOPAS andrngeneric 2-D seabed change model to major sediment transport processes in the study area. ArnGIS-coupled application to 2-dimensional modeling result of coastal hydrodynamics andrnsediment processes is a promising technique for expert system.