2003년 3월 대조기 광양만 부유퇴적물의 유 · 출입에 관한 연구 = A Study on the Sediment Flux in Gwangyang Bay during Spring Tide, March 2003

다국어 초록 (Multilingual Abstract)

As a preliminary study on the sediment flux, concentrations of suspended particulate matter and current speeds were measured at three inlets of Gwangyang Bay during one tidal cycle of a spring tide of March 2003. The suspended sediment flux rate (g/m2/s) at the mouth of Seomjin River (St. K1) was observed to be higher throughout surface layer during ebb tide (14.3g/m2/s) and throughout near-bottom layer during the flood tide (23.2g/m2/s), resulting in a net upstream-ward transport of 0.9×103kg/m during 13 period. At the inlet toward Yeosu Bay (St. K2), a relatively low rate (5.0-6.7g/m2/s) of sediment flux occurred throughout the water column compared to St. K1, with a depth-integrated net transport of 5.6×103kg/m toward the outer reaches of Gwangyang Bay inlet. At St. K3 located at Gwangyang Bay-side of Noryang Strait, the outward flux toward the Jinju Bay was observed to be dominant during the flood tide (16.2-23.2 g/m2/s), especially through the mid and near bottom layer, compared to the inward flux throughout the whole water column during the ebb tide (13.1-19.7g/m2/s). The net transport at St. K3 was calculated to be 4.0×103kg/m toward the outside of Gwangyang Bay. The outward net transport of suspended sediment at all three inlets seems to be consistent with a trend of bottom sediment texture, which suggests a net movement of sediment from a relatively coarse and poorly sorted inner-bay toward a relatively fine and better sorted outer-bay environment.

참고문헌 (Reference)

1 "Suspended sediment budget in Gwangyang Bay through the Yeosu Sound" 31-38, 1991

2 "Summer-Time Behaviour and Flux of Sus- pended Sediments at the Entrance to Semi-Closed Hampyung Bay, Southwestern Coast Of Korea" 5 (5): 105-118, 2000

3 "Spatial and temporal variation of grain size of the surface sediments in Kwangyang Bay, South Coast of Korea" 8 : 340-348, 2003

4 "Sedimentary environments of the Gwangyang Bay southern coast of Korea" ocea (ocea): 82-88, 1984

5 "Sedimentary environment change in Kwangyang bay and Yosu Sound－Based on sediment characteristics and Clay minerals-." 17 : 407-416, 1996

6 "Seasonal variations of Suspended Matters int he Keum Estuary and its Adjacent Coastal Area J" ocea (ocea): 272-280, 1993

7 "Seasonal changes of Tidal-flat sediments; Kwangyang Bay, South Coast of Korea" 8 : 349-356, 2003

8 "Recent Geo- morphological changes and late Quaternary deposi- tional sequence of Gwangyang Bay, southern coast of Korea" 35-43, 2002

9 "Petrology of Sedimentary Rocks" 1968

10 "Numerical experiments for the changes of currents by reclamation of land in Kwangyang Bay" 11 : 637-650, 2002

11 "Fine-grained sedi- ment transport and sorting by tidal exchange in Xiangshan Bay" 397-409, 1990

12 "Concentration and transport of suspended particulate matter in the Seomjin Estuary and Kwang- yang Bay University of Seoul" 1984

13 "Changes in sedimentary process and distribution of benthic foraminifera in the Eastern Part of Kwangyang Bay, South Sea of Korea" 1 : 32-45, 1996

14 "A study on the tidal current structure of Noryang Strait." 124-, 2004

15 "A study in the significance of grain size parameters" 3-26, 1957