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Wintertime suspended sediment simulation in the Huanghai and East China Seas

Acta Oceanologica Sinica 2005年第1期24卷 46-59页

作者： CHOI Byung Ho MUN Jong Yoon KO Jin Seok Department of Civil and Environmental Engineering Sungkyunkwan Unversity Suwon 440-746 KoreaDepartment of Civil and Environmental Engineering Sungkyunkwan Unversity Suwon 440-746 KoreaHyein Engineering & Construction Co Ltd 761 Shingil 7 dong Yungdungpogu Seoul 150-057 Korea

A simulation of suspended sediment movement relating to tidal and wave forcing during a winter monsoon in November 1983 in the Huanghai and East China Seas continental shelf is attempted by using the model describing the cohesive/non-cohesive sediment resus-pension generated by interactions between currents and *** simulation showed that sediment concentration was increased by resuspension at shallow depths during the strong storm conditions due to high bottom stress interacted between currents and waves. This result is in general agreement with observations in horizontal distribution of suspended sediment distribution. At three current meter mooring positions off the southern Shandong Peninsula resuspension occurred only at a depth of 22 m,nearest coastal position and at deeper parts at depths of 51 and 80 m wave-current interaction effects were not significant. It has shown that the present model simulation demonstrated the capability of reproduction of suspended sediment movement under wintertime extreme event reasonably well.

关键词： Huanghai Sea sediment transport model time slice experiment sediment concentration

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Simulation of Suspended Sediment in the Yellow and East China Seas

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China Ocean Engineering 2005年第2期19卷 235-250页

作者： CHOI Byung-Ho MUN Jong-Yoon KO Jin-Seok YUK Jin-Hee Department of Civil and Environmental Engineering Sungkyunkwan University Suwon 440-746 KoreaKorea Ocean Science and Engineering Corporation 175-9 Huam-dong Yongsan-gu Seoul 140-901 KoreaHyein Engineering and Construction Co. Ltd. 150-057 761 Shingil 7 dong Yungdungpogu Seoul KoreaDepartment of Civil and Environmental Engineering Sungkyunkwan University Suwon 440-746 Korea

Described is an initial attempt to simulate the suspended sediment dynamics relating to tidal and wave forcing during summertime in June 1980 and August 1981 for the Yellow and East China Seas continental shelf. The cohesive/non-cohesive sediment resuspension and movement generated by the interaction between current and wave are modeled by use of ECOMSED and WAM Cycle 4. Model results are compared with observations in US-China Marine Sedimentation Dynamics Program performed for 1980-81 at off the Changjiang estuary. The main features of simulations show that suspended sediment concentrations during the summer decreased markedly offshore as observed during the simulation periods. As for some discrepancies for the mouth of the estuary with high river discharges, i.e., the Changjiang River, the model did not properly reproduce the over-mixing situation in the summer; thus distinct vertical concentration variation in this local region is not agreeable with observation. However, general dispersal patterns of suspended sediment movement seem to be agreeably reproduced for the nearshore shallow region. Some of the procedures of simulation and results are presented and discussed.

关键词： Yellow Sea East China Sea sediment transport model time slice experiment sediment concentration

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