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함종화,윤춘경,다니엘 라욱스,Ham, Jong-Hwa,Yoon, Chun-Gyoung,Loucks, Daniel P. 한국농공학회 2007 한국농공학회논문집 Vol.49 No.4
The uncertainty in water quality model predictions is inevitably high due to natural stochasticity, model uncertainty, and parameter uncertainty. An integrated modeling system under uncertainty was described and demonstrated for use in watershed management and receiving-water quality prediction. A watershed model (HSPF), a receiving water quality model (WASP), and a wetland model (NPS-WET) were incorporated into an integrated modeling system (modified-BASINS) and applied to the Hwaseong Reservoir watershed. Reservoir water quality was predicted using the calibrated integrated modeling system, and the deterministic integrated modeling output was useful for estimating mean water quality given future watershed conditions and assessing the spatial distribution of pollutant loads. A Monte Carlo simulation was used to investigate the effect of various uncertainties on output prediction. Without pollution control measures in the watershed, the concentrations of total nitrogen (T-N) and total phosphorous (T-P) in the Hwaseong Reservoir, considering uncertainty, would be less than about 4.8 and 0.26 mg 4.8 and 0.26 mg $L^{-1}$, respectively, with 95% confidence. The effects of two watershed management practices, a wastewater treatment plant (WWTP) and a constructed wetland (WETLAND), were evaluated. The combined scenario (WWTP + WETLAND) was the most effective at improving reservoir water quality, bringing concentrations of T-N and T-P in the Hwaseong Reservoir to less than 3.54 and 0.15 mg ${L^{-1}$, 26.7 and 42.9% improvements, respectively, with 95% confidence. Overall, the Monte Carlo simulation in the integrated modeling system was practical for estimating uncertainty and reliable in water quality prediction. The approach described here may allow decisions to be made based on probability and level of risk, and its application is recommended.
오수처리수의 관개가 벼의 생육 및 수확량에 미치는 효과
우선호 ( Woo Sun Ho ),윤춘경 ( Yoon Chun Gyoung ) 한국농공학회 2000 한국농공학회 학술대회초록집 Vol.2000 No.-
Effect of reclaimed sewage on the paddy rice culture was examined by field experiment for two consecutive years. The domestic sewage was treated by the constructed wetland, and the effluent of the treatment wetland was used for irrigation water. Growth components and yields were compared against the CONTROL plot where conventional fertilization was applied. In general, addition of the reclaimed sewage irrigation which contained high nutrient concentration didn’t affect paddy rice culture adversely, and even better growth and more yields were observed. Overall, reclaimed sewage irrigation was thought to be one of practical alternatives for irrigation water.
담수호에 유입되는 하천수에서의 SS와 COD 및 T-P와의 상관관계
우선호 ( Woo Sun Ho ),윤춘경 ( Yoon Chun Gyoung ) 한국농공학회 1999 한국농공학회 학술대회초록집 Vol.1999 No.-
When it rains, soil erosion occurs and soil particles move into the reservoirs or stream. Nutrients and contaminants, which are adsorbed on soil particles, flow into waterbody and are leached into water. Then they effect on water quality and eutrophication of reservoirs. In this study, correlation of SS to COD was surveyed, and that of SS to T-P was also done. R<sup>2</sup> values in wet period were almost over 0.8, but were very low in dry period. This shows that concentrations of COD and T-P will be assumed by using SS concentrations in wet period in stream.