錦江 河口域의 浮遊물질 年變動에 관한 硏究

• 영문명: Annual Variation Characteristics of Suspended Solid in the Keum River Estuary
• 발행기관: 군산대학교 수산과학연구소
• 저자명: 김영섭(Kim Young-Seup) 이정열(Lee Jeong-Yeol)
• 간행물 정보: 『수산과학연구』제4호, 11~23쪽, 전체 13쪽
• 주제분류: 농수해양 > 해양학
• 파일형태: PDF
• 발행일자: 1988.11.01

영문 초록

This study was conducted to understand the variation characteristics of suspended solid in the Keum River Estuary. Water sampling was carried out regularly with response to the tidal cycle from September, 1986 to August, 1987. Analyzed or observed items were sea water temperature, salinity, TS, TDS, TSS, VSS, FSS. And also the relationships between wind velocity, precipitation, tidal cycle and TSS were investigated. It is found that the sea water temperature is the lowest in January(2.5℃) and the highest in August(24.4℃), and increases toward upstream in summer and vice versa in winter. Salinity is the lowest in August(13.6‰) and the higheirt in December(20.3‰), and the annual mean value shows 13.6‰. TS and TDS are firmly related with her variation of salinity, thus, high in spring and low in summer. The annual mean values of TSS in 199.8(65.3-454.5)mg/ℓ, highest in March 308,2(61.5-792.3)mg/ℓ and lowest in June 36.8(10.9-200.0)mg/ℓ. The annual mean values of VSS is 22.0mg/ℓ, its variation tendency is similar to that of TSS. The annual mean value of VSS/TSS ratio is 13.9(6.8-20.0)%, which are not high level compared with those of polluted sea areas. This ratio is high in summer(24.1%) and low in autumn(13.3%), and increases toward the downstream direction. It is also revealed that TSS shows a positive corpoation with the wind velocity(r=O.59), and a negative with the precipitation in the. Keum River basin(r= -0.64). TSS concentration is primarily subjected to the tidal range and the freshwater discharge and also related to the resuspension of bottom sediments by the action of wind force or wind waves. The dilution rate is strongly subjected to the seasonal variation of the freshwater discharge, therefore, TSS concentration shows low in summer and high in winter. Under low discharge condition in spring, autumn and winter, TSS, VSS are high level in spring tide compared with those in neap tide: under high discharge condition in summer, these values are reversed that is, TSS is higher in neap tide than in spring tide.

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