| Title |
A Study of Marine Environment in the Estuary of Nakdong River : Sedimentation Processes and Heavy Metal Distributions |
| Authors |
이유대 ; 김창원 ; 김동윤 ; 박병남 ; 이기종 ( You Dae Lee ; Chang Won Kim ; Dong Youn Kim ; Byung Nam Park ; Ki Jong Lee ) |
| Abstract |
The sedimentation processes and heavy metal distributions at the Nakdong estuary were investigated during October 1987 and September 1988. The depositional sedimentary environment of the studied area was estuarine environments and was devided into three provinces depending on its textural parameters such as barrier, tidal flat, and water passes. The relationship between the textural parameters showed that the barrier was under strong wave action, that the tidal flat was under relatively weak wind-induced currents, and that the water passes were under strong and continuous tidal currents. Each environment was resulted from different transport mechanism. The sand-barrier sediments were transported by all three populations including suspension, saltation, and bed load. And the water pass-deposited sediments were by the bed-load with some suspension population. In water mass over the studied area, the concentrations of heavy metals including Cu, Cd, Cr^(+6), Pb, and Zn were recorded to be 27.9, 6.7, 20.4, 16.3, and 37.3 ppb in their highest concentrations, respectively. And those in sediments were 20.0, 1.65, 25.4, 15.4, and 132.9 ppm, respectively. The total uptake factors of Cu, Cd, Cr^(+6), Pb, and Zn by V. Mu¨iller (Corbicula fluminea) were 1600, 310, 310, 490, and 7900, respectively. |