유량-유달부하량 관계식을 이용한 용전천 및 단장천의 수질특성 평가

• Published in: 한국수처리학회지, 29(6) pp. 21 - 31
• Main Authors: 최시영, 이남주, 임수빈
• Format: Journal Article
• Language: Korean
• Published: 한국수처리학회 31.12.2021
• Subjects: 토목공학
• ISSN: 1225-7192; 2289-0076
• DOI: 10.17640/KSWST.2021.29.6.21

This study was conducted to identify the runoff characteristics of Yongjeon and Danjang streams, tributaries of Nakdong river basin, through analyzing the flow rate-delivery pollution loading curves and the correlation of water quality factors. The flow rate-delivery pollutant concentration curve analysis exhibited that the water concentration of pollutants increased as the flow rate increased, but it was difficult to derive a correlation formula that could accurately predict changes in water concentration. In the flow rate-delivery pollution loading equation analysis for Yongjeon stream, the flow coefficient of TOC and T-N items were found to have 1.396 and 1.304, respectively, and the flow coefficient of T-P showed a high correlation of 1.606 and the determination coefficient (R2) of the relational expression was mostly 0.93 or higher. In the case of Danjang stream, TOC, T-N, and T-P items showed flow coefficient values of 1.347, 1.232, and 1.301, respectively, and the determination coefficient (R2) of the relational expression was higher than 0.95. These results suggest that Yongjeon and Danjang streams are watersheds with runoff characteristics that increase the organic and nutrient loadings as the flow rate increases. In Yongjeon stream, the flow rate (Q) correlated turbidity with high positive (+) and relatively high positive (+) correlation with TOC, T-N and NO3-N items (p<0.01). For Danjang stream, the flow rate (Q) revealed a relatively high positive (+) correlation with turbidity, TOC and T-P items (p<0.01), and negative (-) correlation with EC (p<0.01). KCI Citation Count: 0