| Title |
Evaluation of Impaired Waterbody and Multivariate Analysis Using Time Series Load Curve -in Jiseok Stream Watershed- |
| Authors |
박진환 ( Jinhwan Park ) ; 강태우 ( Taewoo Kang ) ; 한성욱 ( Sungwook Han ) ; 백승권 ( Seunggwon Baek ) ; 강태구 ( Teagu Kang ) ; 유제철 ( Jechul Yoo ) ; 김영석 ( Youngsuk Kim ) |
| DOI |
https://doi.org/10.15681/KSWE.2017.33.6.650 |
| Keywords |
Factor Analysis; Jiseok Stream Watershed; Load Duration Curve (LDC); Principal Component Analysis; Time Series Load Curve |
| Abstract |
In this study, pollutant emission characteristics by water damage period analyzed 11 items (water temperature, pH, DO, EC, BOD, COD, TOC, SS, T-N, T-P and flow) with load duration curve, time series load curve and factor analysis for three years (2014-2016). Load duration curve is applied to judge the level of impaired waterbody and estimate impaired level by pollutants such as BOD and T-P in this study depending on variation of stream flow. Water quality standard exceeded the flow of mid-range and low-range by flow condition evaluation using load duration curve. This watershed was influenced by point source more than non-point source. Cumulative excess rate of BOD and T-P kept water quality standard for all seasons (spring, summer, autumn and winter) except BOD 59% in spring. Water quality changes were influenced by pollutants of basic environmental treatment facilities and agricultural areas during spring and summer. Results of factor analysis were classified commonly first factor (BOD, COD, and TOC) and second factor (flow, water temperature and SS). Therefore, effects of artificial pollutants and maintenance water must be controlled seasonally and reduced relative to water damage caused by point pollution sources with effluent standard strengthened in the target watershed. |