비점오염 발생 원단위 산정방법에 대한 고찰- 논 비점오염 원단위를 중심으로 -
A Study on the Estimation Methods of Nonpoint Pollutant Unit Load - Focus on Nonpoint Pollutant Unit Load in Paddy Field -
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In order to preserve water environment, Total Maximum Daily Load(TMDL) is used to manage the total amount of pollutant from various sources,and the annual average load of source is calculated by the unit load method. Determination of the unit load requires reliable data accumulation andanalysis based on a reasonable estimation method. In this study, we propose a revised unit load estimation method by analyzing the unit load calculationprocedure of National Institute of Environment Research(NIER) method. Both methods were tested using observed runoff ratio and water quality dataof rice paddy fields. The estimated values with the respective NIER and revised NIER methods were highly correlated each other. However, the EventMean Concentration(EMC) and the runoff ratio considered in the NIER method appeared to be influenced by rainfall classes, and the difference in unitload increases as the runoff and EMC increase. The error can be further increased when the EMC and runoff ratio are changed according to changesin rainfall patterns by climate change and change of agricultural activities. Therefore, it is recommended to calculate unit load by applying the revisedNIER method reflecting the non point pollution runoff characteristics for different rainfall classes
Abstract
In order to preserve water environment, Total Maximum Daily Load(TMDL) is used to manage the total amount of pollutant from various sources,and the annual average load of source is calculated by the unit load method. Determination of the unit load requires reliable data accumulation andanalysis based on a reasonable estimation method. In this study, we propose a revised unit load estimation method by analyzing the unit load calculationprocedure of National Institute of Environment Research(NIER) method. Both methods were tested using observed runoff ratio and water quality dataof rice paddy fields. The estimated values with the respective NIER and revised NIER methods were highly correlated each other. However, the EventMean Concentration(EMC) and the runoff ratio considered in the NIER method appeared to be influenced by rainfall classes, and the difference in unitload increases as the runoff and EMC increase. The error can be further increased when the EMC and runoff ratio are changed according to changesin rainfall patterns by climate change and change of agricultural activities. Therefore, it is recommended to calculate unit load by applying the revisedNIER method reflecting the non point pollution runoff characteristics for different rainfall classes
참고문헌 (33)
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