한강 하구역 점착성퇴적물 침강속도의 지엽적/공간적 변화 KCI

Title
한강 하구역 점착성퇴적물 침강속도의 지엽적/공간적 변화
Alternative Title
Local/Spatial Variation of Settling Velocities of Cohesive Sediments from Han Estuary
Author(s)
서영덕; 진재율; 황규남
KIOST Author(s)
Jin, Jae Youll(진재율)
Publication Year
2008-02
Abstract
The purpose of this study is to quantify the settling velocities of cohesive sediments from Han estuary and to evaluate their local variation within Han estuary. This study also includes an estimation of their spatial variation, for which the settling velocities of cohesive sediments from Han estuary arecompared with those for sediments from other regions. At the same time, physical-chemical properties, such as grain size distribution, the percentage of organic contents, mineralogical composition etc are measured in this study in order to examine their correlation with settling velocities and their effect on settling velocities. Results from settling tests show that the settling velocities of Han estuary mud varies in the range of two orders of magnitude (from 0.01 to 1.5 mm/sec) over the corresponding concentration range of 0.1 to 80 g/L, and a feature of the settling velocity profile is quite different in quantity as compared to those of previous studies for muds from other regions. Particularly in the flocculated settling region, the settling velocity for Han estuary muds is shown to be larger than that of Saemankeum and Keum estuary sediments, while in the hindered settling region all three sediments are shown to have a similar settling velocity. However, local variability of the settling velocities within Han estuary is shown to be insignificant.
ISSN
1225-0767
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/1904
Bibliographic Citation
한국해양공학회지, v.22, no.1, pp.37 - 45, 2008
Publisher
한국해양공학회
Keywords
Cohesive sediments; Settling velocity; Physico-chemical properties; Han estuary; 점착성 퇴적물; 침강속도; 물리·화학적 특성; 한강하구
Type
Article
Language
Korean
Publisher
한국해양공학회
Related Researcher
Research Interests

Sediment transport,Coastal erosion,Numerical modeling,퇴적물이동,연안침식,수치모델

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