한강수계 중권역별 오염물질 추세분석 및 달성도 평가를 통한 우선관리물질 선정
Pollutants Classification based on Trend Analysis and Assessment of Water Pollutants Achievement in Subbasins of Han River Basin
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초록
The objectives of this study were to analyze trends of water pollutants and to evaluate the achievement of water quality standards by subbasins in theHan River. The trends of 40 water pollutants at 232 water quality measurement points were analyzed. Chemical oxygen demand (COD), Total organiccarbon (TOC), Total coliforms (TC), et cetera were found to be worsening trend. For evaluation of achievement, we evaluated water quality arithmeticmean with river environment standards and human health standards at representative points of the subbasin. Biochemical oxygen demand (BOD), TOC,Total phosphorus (T-P), Fecal coliforms (FC), TC exceeded water quality standards, and water quality of human health standards was all satisfied. So,we prioritized pollutants. If pollutants exceed water quality standards or were worse, they were classified first pollutants. Although BOD and T-P arefirst pollutants because of water quality standards excess, they are continuously improved. Also, it is better to maintain current status because waterquality management system of BOD and T-P is well prepared. Meanwhile, TOC, TC, and FC exceed water quality standards. Furthermore, they wereworse gradually, but there is a lack of management systems such as water quality standards of the effluence facilities. Therefore, it is necessary tosupplement the system. The results of this study can be used as primary data for the establishment of water quality standards and selection ofmanagement pollutants.
Abstract
The objectives of this study were to analyze trends of water pollutants and to evaluate the achievement of water quality standards by subbasins in theHan River. The trends of 40 water pollutants at 232 water quality measurement points were analyzed. Chemical oxygen demand (COD), Total organiccarbon (TOC), Total coliforms (TC), et cetera were found to be worsening trend. For evaluation of achievement, we evaluated water quality arithmeticmean with river environment standards and human health standards at representative points of the subbasin. Biochemical oxygen demand (BOD), TOC,Total phosphorus (T-P), Fecal coliforms (FC), TC exceeded water quality standards, and water quality of human health standards was all satisfied. So,we prioritized pollutants. If pollutants exceed water quality standards or were worse, they were classified first pollutants. Although BOD and T-P arefirst pollutants because of water quality standards excess, they are continuously improved. Also, it is better to maintain current status because waterquality management system of BOD and T-P is well prepared. Meanwhile, TOC, TC, and FC exceed water quality standards. Furthermore, they wereworse gradually, but there is a lack of management systems such as water quality standards of the effluence facilities. Therefore, it is necessary tosupplement the system. The results of this study can be used as primary data for the establishment of water quality standards and selection ofmanagement pollutants.
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