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Journal of the Korean Chemical Society (JKCS)

ISSN 1017-2548(Print)
ISSN 2234-8530(Online)
Volume 6, Number 2
JKCSEZ 6(2)
April 20, 1962 

 
Title
Seasonal Variations of Chemical Composition of the Estuary Water in Guang Yang Inlet from Mar. 1961 to Feb. 1962

섬진강 하구 간석지 수질의 연간변화
Author
Chong Hun Won

원종훈
Keywords
Abstract
Seasonal variation of chemical constituents of estuarine water at a definite station of the tidal flat in Guang Yang inlet have been determined for two days a month. The range and mean of the annual variations are as follows: Constituent Range Mean Constituent Range Mean Water temp. (℃) 4-30 19 Oxygen, Saturation (%) 69-143 99 pH 8.0-8.6 8.3 Silicate-Si (μg-at./l) 3.40-85.1 17.6 Chlorinity (‰) 7.15-18.28 15.68 Phosphate-P (μg-at./l) 0.14-1.19 0.43 Magnesium (g/ls) 0.58-1.28 1.08 Ammonia-N (μg-at./l) 1.35-6.26 3.54 Calcium (g/l) 0.16-0.40 0.35 Nitrite-N (μg-at./l) 0.03-0.64 0.12 Iron (μg-at./l) 0.1-2.5 0.5 Nitrate-N (μg-at./l) 1.05-4.89 2.12 Tidal variations through a year are as follows: 1. Although the tidal value of pH is almost constant during one tidal cycle, it raises abruptly 0.1-0.2 intervals of pH value during the first period of flood. 2. The lower values of chlorinity, magnesium and calcium contents have been determined the nearer the slack after ebb, and slightly higher during the first period of flood tide than the last of ebb. The tidal change of calcium contents is more remarkable than of magnesium. 3. The higher per cent saturation values of dissolved oxygen, sometimes higher than 100 per cent, are determined the nearer the slack after ebb. 4. The total nitrogen contents, relatively poor, varies accidentally during one tidal cycle, whereas phosphate-P and silicate-Si are rich at the slack after ebb and increase proportionally to the mixing percentage of fresh water. The average values, 52.2 and 18.5, of Si/P and N/P are greater than of the normal. 5. The acid soluble iron contents, lower in winter than in summer, is also varies accidentally during one tidal cycle and the magnitude of the variation is large. 6. The chemical composition considered from the value of Ca/Cl or Mg/Cl of estuarine water varies according to the chlorinity even at the high chlorinity of 18-19‰.
Page
176 - 197
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