| Title |
Analysis of Water Quality Trends Using the LOADEST Model: Focusing on the Youngsan River Basin |
| Authors |
이기순 ( Gi-Soon Lee ) ; 백종훈 ( Jonghun Baek ) ; 최지연 ( Ji Yeon Choi ) ; 이영재 ( Youngjea Lee ) ; 신동석 ( Dong Seok Shin ) ; 하돈우 ( Don-Woo Ha ) |
| DOI |
https://doi.org/10.15681/KSWE.2022.38.6.306 |
| Keywords |
LOADEST; Pollutant loads; Regression model; Youngsan river |
| Abstract |
In this study, long-term measurement data were applied to the LOADEST model and used as an analysis tool to identify and interpret trends in pollution load. The LOADEST model is a regression equation-based pollution load estimation program developed by the United States Geological Survey (USGS) to estimate the change in the pollution load of rivers according to flow rate and time and provides 11 regression equations for pollution load evaluation. As a result of simulating the Gwangjuchen2, Pungyeongjeongchen, and Pyeongdongchen in the Yeongbon B unit basin in the middle and upper reaches of the Yeongsan River with the LOADEST model using water quality and flow measurement data, lower values were observed for the Gwangjuchen2 and Pyeongdongchen, whereas the Pungyeongjeongchen had higher values. This was judged to be due to the characteristics of the LOADEST model related to data continuity. According to the parameters estimated by the LOADEST model, pollutant trends were affected by increases in the flow. In addition, variability increased with time, and BOD and T-P were affected by the season. Thus, the LOADEST model can contribute to water quality management as an analytical tool for long-term data monitoring. |