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A Study on Settling Properties of Fine-Cohesive Sediments in Keum Estuary  

Ryu Hong-Ryul (Dept. of Civil Eng., Chonbuk National Univ.)
Chun Min-Chul (Hangdo ENG.)
Hwang Kyu-Nam (Dept. of Civil Eng. & RICT, Chonbuk National Univ.)
Publication Information
Journal of Korean Society of Coastal and Ocean Engineers / v.18, no.3, 2006 , pp. 251-261 More about this Journal
Abstract
The purpose of this study is to quantitatively estimate the settling property for fine-cohesive sediments in Keum Estuary and to evaluate the spatial variation by analyzing and comparing the local and seasonal variation of the settling properties in Keum Estuary with that of the settling properties in the other sites. After the spatial variation of physico-chemical properties such grain size distribution, the percentage of organic contents, mineralogical composition etc is investigated through experiments and analyses, interrelation between the physico-chemical properties and settling velocities and effect that the physico-chemical properties have on the quantitative variation of settling velocities were also analyzed in this study. Experimental results of settling tests shows that settling velocities of Keum Estuary mud vary in the range of two orders of magnitude (from 0.01 to 1mm/sec) over the corresponding concentration range of 0.1 to 80 g/L, and a feature of settling velocity profile is quite different in quantity as compared to those of previous studies with mud of other regions: Saemankuem, Tampa Bay, Sevem Estuary and lake Okeechobee. However, their local and seasonal variabilities within Keum Estuary appear to be insignificant.
Keywords
fine-cohesive sediments; settling velocity; settling test; physico-chemical properties;
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