| Title |
A Study on the Selection of the Total Pollution Load Management at Tributaries by Evaluation of Water Quality Volatility: Case Study for Chungcheongnam-do |
| Authors |
최정호 ( Jeongho Choi ) ; 김홍수 ( Hongsu Kim ) ; 조병욱 ( Byunguk Cho ) ; 박상현 ( Sanghyun Park ) ; 이무규 ( Mukyu Lee ) ; 이병구 ( Byeonggu Lee ) ; 강우람 ( Uram Kang ) |
| DOI |
https://doi.org/10.15681/KSWE.2023.39.5.377 |
| Keywords |
Mann-Kendall test; Sen’s Slope; Stream grouping method; Total Pollution Load Management at Tributaries |
| Abstract |
Chungcheongnam-do has been measuring the flow rate and water quality of streams in the province once a month since 2011 in order to water environment policies. Based on the results, after evaluating the coefficient of variation and the tendency of the water quality trend by using the Mann-Kendall test and Sen’s Slope for each stream, the streams subject to priority introduction of Total Pollution Load Management at Tributaries were selected through the Stream Grouping Method. The water quality trend analysis results for 125 streams using the Mann-Kendall test and Sen’s Slope were evaluated as streams showing a tendency of deteriorating water quality Biochemical oxygen demand (BOD): 13 streams, Total Phosphorus (T-P): 16 streams). Streams with deteriorating water quality were classified into A-D groups using the Stream Grouping Method. Group A, which has a high flow rate and high water quality, is a stream that requires priority management, and was selected as a stream for introduction of Total Pollution Load Management at Tributaries. There are 7 streams that need to be introduced into the BOD category, and there are 7 streams that need to be introduced into the T-P category. In this study, based on flow and water quality monitoring data accumulated over a long period of time (2011-2022), statistical techniques are used to select watersheds in which water quality is deteriorating. Accordingly, it is expected that it will be useful in establishing a water quality improvement plan in the future. |