Distribution and Behaviors of In-Situ Suspended Particulate Matters of Gwangyang Bay

J. Ocean Eng. Technol. 2010;24(1):99-105.

Lee Byoung-Kwan,Kim Seok-Yun,Cho Hyun-Man

Oceaneng Co. LTD.,Dept of Oceanography Pukyung National University,Dept of Ocean Engineering Pukyung National University

광양만내의 현장 부유입자물질 분포와 거동

이병관,김석윤,조현만

(주)오션이엔지,부경대학교 해양학과,부경대학교 해양공학과

Keywords: Seomjin river estuary, Gwangyang bay, In-situ particle size, Suspended particulate matters, LISST-100

핵심용어: 섬진강하구, 광양만, 현장입도, 부유입자물질, 수중입도분석기

Abstract

The concentration and size analysis of in-situ suspended particulate material were measured using an optical instrument, LISST-100, in the bottom layer at the three inlets of the Seomjin River Estuary, mouth of Gwangyang bay, and Gwangyang bay-side of the Namhae Bridge. In the Seomjin river estuary and mouth of Gwangyang bay-side of the Namhae Bridge, the in-situ mean grain size of the suspended material changed from a uni-modal distribution with a dominant peak at a coarse fraction to a bi-modal distribution with a secondary peak at the finer particles. Seomjin River. The interactions between suspended particulate concentration and beam attenuation coefficient of suspended particulate matters depended on the supply of finer and coarser particles in the mouth of Gwangyang Bay and Seomjin River. So, interactions reflected difference of the concentration, mean size and sorting of suspended particulate matters. The difference of interaction showed dynamic behaviors to the resuspension and deflocculation processes increased river discharge. This showed that it may be possible to use the interactions between the suspended particle concentration and beam attenuation coefficient to monitor the temporal and spatial distributions of in-situ particles.