영일만 수질의 시공간 변동에 미치는 담수유입의 효과
The effect of Freshwater Inflow on the Spatio-temporal Variation of water quality of Yeongil Bay
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- In order to determine the effect of fresh water inflow from the Heongsanriver on the changes of water quality in the Yeongil Bay (Korea), the seasonal changesof water temperature, salinity, chemical oxygen demand (COD), dissolved inorganicnitrogen(DIN) and phosphate phosphorus (PO4-P) concentrations were examinedusing the data set obtained five fixed points of Yeongil Bay from 1998 to 2000. Thedistributions and changes of COD and concentrations of total inorganic phosphorous(TIP) and nitrogen (TIN) at three points Heongsan river, were also compared withthose of Yeongil Bay. Based on the correlations of DIN and PO4-P, it was found thatthe inflow of freshwater affected on the water quality of Yeongil Bay. Such a compli-cacy was confirmed by the prominent differences in a few water quality measuresbetween Site 1(the innermost area) and Site 5 (the mouth of the bay). The negativecorrelations in N/P at sites 1, 2 and 3 of the inner-part of the bay also indicated alarge effect of freshwater inflow on the water quality of the bay. The extremely lowatomic ratio of an average of 6.4 in N/P compared to the Redfild ratio suggested thatthe DIN was depleted in the overall bay system. In contrast, it was inferred that theexcessive PO4-P concentration was due to the inflow of freshwater from the Heongsanriver.
Abstract
- In order to determine the effect of fresh water inflow from the Heongsanriver on the changes of water quality in the Yeongil Bay (Korea), the seasonal changesof water temperature, salinity, chemical oxygen demand (COD), dissolved inorganicnitrogen(DIN) and phosphate phosphorus (PO4-P) concentrations were examinedusing the data set obtained five fixed points of Yeongil Bay from 1998 to 2000. Thedistributions and changes of COD and concentrations of total inorganic phosphorous(TIP) and nitrogen (TIN) at three points Heongsan river, were also compared withthose of Yeongil Bay. Based on the correlations of DIN and PO4-P, it was found thatthe inflow of freshwater affected on the water quality of Yeongil Bay. Such a compli-cacy was confirmed by the prominent differences in a few water quality measuresbetween Site 1(the innermost area) and Site 5 (the mouth of the bay). The negativecorrelations in N/P at sites 1, 2 and 3 of the inner-part of the bay also indicated alarge effect of freshwater inflow on the water quality of the bay. The extremely lowatomic ratio of an average of 6.4 in N/P compared to the Redfild ratio suggested thatthe DIN was depleted in the overall bay system. In contrast, it was inferred that theexcessive PO4-P concentration was due to the inflow of freshwater from the Heongsanriver.
참고문헌 (19)
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