PREDICTION OF SEABED HABITAT CHANGE DUE TO SAND EXTRACTION IN COASTAL WATERS OF KOREA
Investigation of the sediment transport and change in surface sediments at the seabed is conducted for marine sand mining operation in Kyunggi Bay, Korea. A new methodology established through field experiment is proposed and applied in numerical simulation to predict the redistribution of sediments deposited away from the dredging site. Differentiation of sediment composition into each grain size group yields the different transport behavior in nature and in numerical simulation. A three dimensional numerical model, ROMS (Regional Ocean Modeling System) is used for sediment transport modeling using realistic surface and tidal forcing. The marine sand mining intensity is imposed on the modeling along with empirical parameters estimated from the field experiment. In the current study, a new procedure of estimating the suspended sediment source from the dredger has been suggested based on numerous field surveys, especially employing discrimination of size class of composed sediments. The present study improves our ability to predict the reworking processes of composed sediments by employing new concept of size-dependent behavior. However it is still open to further work to include the resuspension process for more quantitative prediction of seabed change arising from long-term dredging of marine sand in shallow waters as in Kyunggi Bay.
Chang S. Kim Hak-Soo Lim Jinah Kim
Korea Ocean R&D Institute, 1270 Sa2Dong, Ansan 426-744 South Korea
国际会议
第四届亚太地区海岸会议(the Fourth International Conference on Asian and Pacific Coasts)
南京
英文
2007-09-21（万方平台首次上网日期，不代表论文的发表时间）