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연구논문 : 과수재배지 비점오염부하량 추정회귀식 비교 검증
권헌각 ( Heon Gak Kwon ),이재운 ( Jae Woon Lee ),이윤정 ( Youn Jeong Yi ),천세억 ( Se Uk Cheon ) 한국물환경학회(구 한국수질보전학회) 2014 한국물환경학회지 Vol.30 No.1
In this study, regression equation was analyzed to estimate non-point sources (NPS) pollutant loads in orchard area. Many Factors affecting the runoff of NPS pollutant as precipitation, storm duration time, antecedent dry weather period, total runoff density, average storm intensity and average runoff intensity were used as independent variables, NPS pollutant was used as a dependent variable to estimate multiple regression equation. Based on the real measurement data from 2008 to 2012, we performed correlation analysis among the environmental variables related to the rainfall NPS pollutant runoff. Significance test was confirmed that T-P (R2=0.89) and BOD (R2=0.79) showed the highest similarity with the estimated regression equations according to the NPS pollutant followed by SS and T-N with good similarity (R2>0.5). In the case of regression equation to estimate the NPS pollutant loads, regression equations of multiplied independent variables by exponential function and the logarithmic function model represented optimum with the experimented value.
수질오염총량관리 단위유역 장기유황곡선 구축 -낙동강수계를 대상으로-
김경훈 ( Gyeong Hoon Kim ),권헌각 ( Heon Gak Kwon ),안정민 ( Jung Min Ahn ),김상훈 ( Sanghun Kim ),임태효 ( Tae Hyo Im ),신동석 ( Dong Seok Shin ),정강영 ( Kang-young Jung ) 한국환경과학회 2017 한국환경과학회지 Vol.26 No.8
For the development of flow duration curves for the management of 41 Total Maximum Daily Load (TMDL) units of the Nakdong River basin, first, an equation for estimating daily flow rates as well as the level of correlation (correlation and determination coefficients) was extrapolated through regression analysis of discrete (Ministry of Environment) and continuous (Ministry of Land, Infrastructure and Transportation) measurement data. The equation derived from the analysis was used to estimate daily flow rates in order to develop flow duration curves for each TMDL unit. By using the equation, the annual flow duration curves and flow curves, for the entire period and for each TMDL unit of the basin, were developed to be demonstrated in this research. Standard flow rates (abundant-, ordinary-, low- and drought flows) for major flow duration periods were calculated based on the annual flow duration curves. Then, the flow rates, based on percentile ranks of exceedance probabilities (5, 25, 50, 75, and 95%), were calculated according to the flow duration curves for the entire period and are suggested in this research. These results can be used for feasibility assessment of the set values of primary and secondary standard flow rates for each river system, which are derived from complicated models. In addition, they will also be useful for the process of implementing TMDL management, including evaluation of the target level of water purity based on load duration curves.
연구논문 : 낙동강유역 과수재배지의 단위면적당 비점오염부하량 산정에 관한 연구
이재운 ( Jae Woon Lee ),권헌각 ( Heon Gak Kwon ),이윤정 ( Youn Jeong Yi ),천세억 ( Se Uk Cheon ) 한국환경영향평가학회 2013 환경영향평가 Vol.22 No.6
In this study, Calculated the nonpoint sources(NPS) load per unit area about various rainy events in vineyard of Nakdong River basin. NPS monitoring and calculation for NPS load per unit area were estimated from ‘Investigation method of precipitation discharge(National Institute of Environmental Research, 2007)’. The evaluation of applicability for NPS load per unit by compared with prior research data and Total Maximum Daily Load(TMDL) data. Five target areas were each 2000㎡ , 1800㎡ , 1943㎡ , 2484㎡ , 864㎡ and located in Gyeongsangbukdo Gyeongju, Gyeongsangbukdo Sangju, Gyeongsangnamdo Hapcheon in Korea. Since fruits were the only crop on the target area, the characteristics of stormwater discharge at survey sites could be evaluated independently. A total of 115 rainfall events in the Orchard area during five years(2008- 2012) was surveyed, and 38 of them became stormwater discharge. In the Nakdong River watershed, average of event mean concentrations(EMCs) in Orchard area for biochemical oxyzen demand(BOD), Chemical oxyzen demand(COD), total nitrogen(T-N), total phosphorus(T-P) were 2.0㎎/L, 10.1㎎/L, 3.195 ㎎/L, 0.578㎎/L, respectively. NPS load per unit area in Orchard area showed BOD : 2.0㎏/㎢·day, COD : 10.2㎏/㎢·day, T-N : 3.220㎏/㎢·day, T-P : 0.606㎏/㎢·day.