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This study was conducted to understand the variation of suspended matters in coastal waters of Cheju Island. Water sampling was carried out at 22 stations along the coast of this island from March 1988 to November 1989. Analyzed and/or observed items were water temperature, salinity, total solids (TS), total dissolved solids (TDS), volatile suspended solids (VSS), and fixed suspended solids (FSS). Inter-relationships between wind velocity, precipitation and total suspended solids (TSS) were also investigated.
More windy days prevail in winter season (December, January and February) in Cheju Island. Thirty-six points seven percent of total windy days of a year appeared in this season. The rate of windy days in spring was 27.3% and those in summer and fall were 17.9% each.
From February to July, the heaviest precipitation was observed in the southeastern area and that from August to January was observed in the eastern part of this island.
TS and TDS were firmly related with the fluctuation of salinity. Therefore, there were higher in spring and lower in summer. The highest TSS (7.73 mg/ℓ) was observed in February and was the lowest (4.73 mg/ℓ) in September. Annual mean value of TSS was 6.3mg/ℓ. The highest VSS (2.03 mg/ℓ) was observed in July and lowest (1.42 mg/ℓ) in September.
The percentage of VSS per TSS was 30.6 % in average that was not much higher level compared to the other polluted areas. This value became higher in summer (av. 34.17%) and lower in winter (av. 24.2 % ). Fluctuation of TSS was mainly related with the freshwater discharge, tidal action, and re-suspension of bottom sediments by the wind waves. Therefore, TSS concentration was low in summer and high in winter.
More windy days prevail in winter season (December, January and February) in Cheju Island. Thirty-six points seven percent of total windy days of a year appeared in this season. The rate of windy days in spring was 27.3% and those in summer and fall were 17.9% each.
From February to July, the heaviest precipitation was observed in the southeastern area and that from August to January was observed in the eastern part of this island.
TS and TDS were firmly related with the fluctuation of salinity. Therefore, there were higher in spring and lower in summer. The highest TSS (7.73 mg/ℓ) was observed in February and was the lowest (4.73 mg/ℓ) in September. Annual mean value of TSS was 6.3mg/ℓ. The highest VSS (2.03 mg/ℓ) was observed in July and lowest (1.42 mg/ℓ) in September.
The percentage of VSS per TSS was 30.6 % in average that was not much higher level compared to the other polluted areas. This value became higher in summer (av. 34.17%) and lower in winter (av. 24.2 % ). Fluctuation of TSS was mainly related with the freshwater discharge, tidal action, and re-suspension of bottom sediments by the wind waves. Therefore, TSS concentration was low in summer and high in winter.
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