논 물꼬관리 기법 적용에 따른 원단위 삭감부하량 산정식 평가
Assessing the Unit Load Reduction Equation of Drainage Outlet Raising Management in Paddy Fields
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초록
The DOR (Drainage outlet raising) in the paddy field has been suggested as one of the most important best management practices for the TMDL (Totalmaximum daily load) management in the technical guidelines by the NIER (National institute of environmental research). However, this method isunderestimated and is not well adopted by local governments for the TMDL. The purpose of this study is to evaluate the unit load reduction equationaccording to the application of DOR in order to expand this equation. The original equation in the guideline was derived using the HSPF (HydrologicalSimulation Program-Fortran) model for 1 year in Changnyeong. We analyzed the reduction effect of the original equation application by collectingadditional long-term monitoring data from the Buan, Icheon, Iksan, and Jeonju. When comparing the reduction loads between the original equation andmonitoring results, the evaluation results of the original equation were 11% of the monitoring analysis results, which was underestimated. This meansthat the original equation needs to be improved. For assessing the equation, the HSPF Paddy-RCH model was established according to the NIERguideline and evaluated for applicability. The performance results of the model showed a reasonable range by the statistical criteria. Modified equations1 and 2 were proposed based on the monitoring and modeling results. Modified equation 1 was the method of modifying the original equation’s mainfactors, and modified equation 2 was the method of applying the non-point pollution reduction efficiency according to the rainfall class using thelong-term modeling results. At the level of 58.6∼64.6% of monitoring data, the difference between them could be further reduced compared to theoriginal equation. The suggested approach will be more reasonable and practicable for decision-makers and will contribute to the TMDL managementplans.
Abstract
The DOR (Drainage outlet raising) in the paddy field has been suggested as one of the most important best management practices for the TMDL (Totalmaximum daily load) management in the technical guidelines by the NIER (National institute of environmental research). However, this method isunderestimated and is not well adopted by local governments for the TMDL. The purpose of this study is to evaluate the unit load reduction equationaccording to the application of DOR in order to expand this equation. The original equation in the guideline was derived using the HSPF (HydrologicalSimulation Program-Fortran) model for 1 year in Changnyeong. We analyzed the reduction effect of the original equation application by collectingadditional long-term monitoring data from the Buan, Icheon, Iksan, and Jeonju. When comparing the reduction loads between the original equation andmonitoring results, the evaluation results of the original equation were 11% of the monitoring analysis results, which was underestimated. This meansthat the original equation needs to be improved. For assessing the equation, the HSPF Paddy-RCH model was established according to the NIERguideline and evaluated for applicability. The performance results of the model showed a reasonable range by the statistical criteria. Modified equations1 and 2 were proposed based on the monitoring and modeling results. Modified equation 1 was the method of modifying the original equation’s mainfactors, and modified equation 2 was the method of applying the non-point pollution reduction efficiency according to the rainfall class using thelong-term modeling results. At the level of 58.6∼64.6% of monitoring data, the difference between them could be further reduced compared to theoriginal equation. The suggested approach will be more reasonable and practicable for decision-makers and will contribute to the TMDL managementplans.
참고문헌 (18)
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