• Title/Summary/Keyword: 득량만

Search Result 75, Processing Time 0.042 seconds

Surface Sediment and Suspended Material in Deukryang Bay (득량만의 퇴적물 및 부유물 특성)

  • 공영세;이병걸
    • 한국해양학회지
    • /
    • v.29 no.3
    • /
    • pp.269-277
    • /
    • 1994
  • Process of resuspension and accumulation well explaines the characteristics of surface sediment size distribution and suspended material in Deukryang Bay. Most of the surface sediments of the bay show asymmetric unimodal size distribution, which is found also in sediments from western part of the inner shelf mud area between Keomundo and Yokchido islands. Investigation of the size curves indicates that surface sediment in Deukryang Bay is a deposit of suspended coastal sediment transported east along southern coast of Korea. The distribution pattern of coarse sit fraction content in the surface sediment is very similar to that of computed current velocity (Lee, 1994), suggesting that fine sediment on the bed may reassumed and accumulate repeatedly due to shallow depth and strong tidal current in Deukryang Bay. The process of repeated resuspension and accumulate repeatedly due to shallow depth and strong tidal current in Deukryang Bay. The process of repeated resuspension and accumulation seems to be responsible not only to the asymmetric size distribution of the surface sediment, but also to the amount of suspended material in the bay. The difference of suspended material concentration between surface and near bottom water in summer is two times as large as that the in winter. This seems to derive from the fact that stratification of water mass prevails in summer, while total water mass is vertically mixed in winter. It was found that the most important factors to decide distribution of suspended material in Deukryang Bay are the physical properties of water mass such as current velocity and stratification, and water depth, in part with the supply of suspended sediment by rivers.

  • PDF

득량만 표층퇴적물내 미량금속원소의 지리적 분포특성

  • 김성수;이재성;김귀영;정래홍;고태승
    • Proceedings of the Korean Society of Fisheries Technology Conference
    • /
    • 2002.10a
    • /
    • pp.152-153
    • /
    • 2002
  • 남해안의 서쪽에 위치한 득량만은 면적이 374$\textrm{km}^2$로 비교적 넓으며, 평균 수심이 약 7.5m(최고수심 40m)로서 남북방향 장축의 길이가 약 50km, 동서방향 폭이 4.6~11.0km이다. 만 남쪽에는 금당도, 거금도, 소록도 등의 섬들 사이의 3개 수로에 의해 해수교환이 이루어지고 있어 남해안의 다른 만에 비해 외해와의 해수교환이 비교적 원활한 편이다. (중략)

  • PDF

Distribution of Zooplankton in Deukryang Bay, Korea (득량만 동물플랑크톤의 분포)

  • HAN Dong Hoon;HONG Sung Yun;MA Chae Woo
    • Korean Journal of Fisheries and Aquatic Sciences
    • /
    • v.28 no.5
    • /
    • pp.517-532
    • /
    • 1995
  • Distribution of zooplankton was studied based on the zooplankton samples from collected 15 stations in Deukryang Bay in July and September, 1992 and January and March, 1993. Zooplankton biomass $(mg/m^3)$ showed maximum in March and minimum in July, whereas abundance $(inds./m^3)$. showed maximum in September and minimum in March. Variation in biomass depended on changes in body size of Sagitta crassa. S. crassa of large body size resulted in high biomass in March. Noctiluca scintillans and copepods in September showed high abundance but low biomass. Species composition and abundance were closely related to seasonal variation of water temperature. Of the dominant zooplankton taxa, decapod larvae were predominant in July, copepods in September and January, and coelenterates 3n March. Three copepod species, Paracalanus indicus, Acartia pacifica and Pseudodiaptomus marinus were dominant in July and March, September, and January, respectively.

  • PDF

Distribution of the Bivalve Resources in Keukryang Bay (득량만에서 조개류 자원 분포)

  • 김철원;허성범
    • Journal of Aquaculture
    • /
    • v.11 no.2
    • /
    • pp.249-260
    • /
    • 1998
  • Distribution of the bivalve resorves in Deukryang Bay was investigated in May, August and November, 1995 and February, 1996. Seasonal sampling was carred out from 29 stations in Deukryang Bay. The bivalve resouces in the bay consisted of 10 species nd mean density in individuals and biomass was 3 inds./$m^2$ and 211g/$m^2$ in May, 3 inds./$m^2$ and 185g/$m^2$ in August, 2 inds./$m^2$ and 379g/$m^2$ in November, 2 inds./$m^2$ and 305g/$m^2$ in February. The dominant bivalve species in Deukryang Bay was pen shell (Atrina pectinata) through the year. Species composition and abundance of the bivalve resources were closely related to station. The stock density was high at inner stations in the bay. G1 station showed the highest density among 29 stations.

  • PDF