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RISS 인기검색어
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- 저자 : 윤광식 ( Yun Gwang Sig ) (검색결과 1 건)
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전지홍 ( Jeon Ji Hong ),윤춘경 ( Yun Chun Gyeong ),황하선 ( Hwang Ha Seon ),윤광식 ( Yun Gwang Sig ) 한국하천호수학회 2003 생태와 환경 Vol.36 No.3
Water quality model applicable paddy field was developed using field experiment during 1999~2002. This model involves inputs from fertilization and sediment release as dirac delta function and continuous source function, respectively, and can simulate various processes such as ponded depth, surface drainage, total nitrogen concentration and total phosphorus concentration in a daily basis. The model was calibrated using data collected from field experiments which was irrigated with ground water and validated from field experiments which was irrigated with surface water. The nutrient concentration of surface water depended on the fertilization and dirac delta function can efficiently explain the valiance of nutrient concentration of surface water by fertilizer. As a result of calibration and validation, this model demonstrates good agreement. The model fit efficiencies (R²) of ponded depth, surface concentration of TN and TP were 0.93, 0.98 and 0.95, respectively for calibration, and whose of TN and TP were 0.99 and 0.70, respectively for validation. We can apply lake and reservoir model to analysis paddy field considered with shallow ponded system, but it will need so many parameters and have much uncertainty. Fortunately, paddy field have a series of cultural practices yearly basis, such as irrigation-fertilization-forced drain-harvest with a similar time, so simple model may explain the mechanism for paddy field. Water quality model for paddy field developed in this study is simply, needs little parameters, but appeared high applicability to evaluate paddy filed drainage. We recommend this model to estimate nutrient loading from paddy field and establish best management practice.
ScienceON
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