poster - International Conference of Agricultural Engineering
poster - International Conference of Agricultural Engineering poster - International Conference of Agricultural Engineering
FIGURE 2 shows the SS and Turbidity variations of Seokji stream. The variations were divided into irrigation and non-irrigation periods to analyze the changes in water quality to the differences in the flow. The pollutant concentrations regarding COD, TOC, and Turbidity of the non-irrigation periods were slightly higher than the pollutant concentrations of the irrigation periods in the Hai reservoir. The pollutant concentrations of the regarding SS, COD, COD, TOC, Turbidity, T-N, and T-P of the non-irrigation periods were higher than the pollutant concentrations of the irrigation periods in the Seokji stream. The contaminant concentrations decreased nearer downstream. However, at the last station, there was a showing of an increase in concentration. This phenomenon was judged to be from the effects of ambient pollutants, like incinerated waste. The concentrations of SS were almost immeasurable during the non-irrigation periods. However, the concentrations of SS were judged to be high due to the inflow of ambient pollutants during the irrigation periods. FIGURE 2 SS and Turbidity variations for irrigation and non-irrigation periods of Seokji stream 3.3 Correlation Analysis between Water Quality Parameters The correlation of water quality items from the reservoir and stream studies were analyzed using the water quality data obtained in July. Water quality was the independent variable and the control variable was the flow. In the case of the station located 530 m of Seokji stream, the correlation coefficients between SS and T-P, and TOC and Turbidity were shown to be 0.925 and 0.960, respectively at a 0.01 level of significance. The correlation coefficients between COD and TOC, SS and TOC, SS and Turbidity, and TOC and T-P were shown to be 0.865, 0.854, 0.856, and 0.836, respectively at a 0.05 level of significance (TABLE 4). In the case of the station located 750 m of Bonghyeon stream, the correlation coefficient between COD and TOC was shown to be 0.887 at a 0.05 level of significance. At the station located 1,260 m of Bonghyeon stream, the correlation coefficients between the pH and COD, the pH and TOC, BOD and T-N, and COD and TOC were shown to be 0.920, 0.930, 0.938, and 0.932, respectively at a 0.01 level of significance. The correlation coefficients between the pH and T-P, BOD and COD, BOD and T-P, COD and T-P, TOC and T-P were shown to be 0.813, 0.814, 0.822, 0.866, and 0.818, respectively at a 0.05 level of significance (TABLE 5). TABLE 4 Correlation analysis of water quality data at Seokji stream (530 m) pH BOD COD SS TOC Turbidity T-P T-N pH 1.000 0.649 0.672 0.294 0.631 0.578 0.229 0.535 BOD 1.000 0.594 0.777 0.743 0.777 0.534 0.467 COD 1.000 0.571 0.865 * 0.744 0.530 0.449 SS 1.000 0.854 * 0.856 * 0.925 ** -0.069 TOC 1.000 0.960 ** 0.836 * 0.188 Turbidity 1.000 0.800 0.238 T-P 1.000 -0.343 T-N 1.000 * p
TABLE 5 Correlation analysis of water quality data at Bonghyeon stream 750 m 1,260 m pH BOD COD SS TOC Turbidity T-P T-N pH 1.000 0.335 0.652 -0.408 0.791 0.041 -0.185 -0.429 BOD 1.000 0.756 0.104 0.710 -0.586 -0.144 0.004 COD 1.000 -0.064 0.887 * 0.033 -0.591 0.055 SS 1.000 -0.366 -0.126 0.362 -0.350 TOC 1.000 -0.057 -0.413 0.040 Turbidity 1.000 -0.554 0.315 T-P 1.000 -0.642 T-N 1.000 pH 1.000 0.660 0.920 ** 0.158 0.930 ** 0.655 0.813 * 0.503 BOD 1.000 0.814 * -0.156 0.768 -0.070 0.822 * 0.938 ** COD 1.000 -0.209 0.932 ** 0.452 0.866 * 0.759 SS 1.000 0.002 0.229 -0.044 -0.450 TOC 1.000 0.429 0.818 * 0.700 Turbidity 1.000 0.417 -0.200 T-P 1.000 0.727 T-N 1.000 * p
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- Page 221 and 222: OD (mg L -1 ) OD obs (mg L -1 ) TAB
- Page 223 and 224: OD (mg L -1 ) DBO (mg L -1 ) 8,00 7
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TABLE 5 Correlation analysis <strong>of</strong> water quality data at Bonghyeon stream<br />
750 m<br />
1,260 m<br />
pH BOD COD SS TOC Turbidity T-P T-N<br />
pH 1.000 0.335 0.652 -0.408 0.791 0.041 -0.185 -0.429<br />
BOD 1.000 0.756 0.104 0.710 -0.586 -0.144 0.004<br />
COD 1.000 -0.064 0.887 * 0.033 -0.591 0.055<br />
SS 1.000 -0.366 -0.126 0.362 -0.350<br />
TOC 1.000 -0.057 -0.413 0.040<br />
Turbidity 1.000 -0.554 0.315<br />
T-P 1.000 -0.642<br />
T-N 1.000<br />
pH 1.000 0.660 0.920 ** 0.158 0.930 ** 0.655 0.813 * 0.503<br />
BOD 1.000 0.814 * -0.156 0.768 -0.070 0.822 * 0.938 **<br />
COD 1.000 -0.209 0.932 ** 0.452 0.866 * 0.759<br />
SS 1.000 0.002 0.229 -0.044 -0.450<br />
TOC 1.000 0.429 0.818 * 0.700<br />
Turbidity 1.000 0.417 -0.200<br />
T-P 1.000 0.727<br />
T-N 1.000<br />
* p
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