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기술노트 : 수질오염총량관리제 시행에 따른 영산강,섬진강수계 단위유역의 수질 현황
박재홍 ( Jae Hong Park ),류덕희 ( Doug Hee Rhew ),정동일 ( Dong Il Jung ) 한국물환경학회(구 한국수질보전학회) 2011 한국물환경학회지 Vol.27 No.5
The results of investigation on the water quality of the unit watersheds in the Yeongsang/Seomjin River indicate that BOD5, SS, T-P decrease in most of the unit watersheds. However, CODMn and T-N increase since the Total Maximum Daily Loads (TMDLs). It is thought that CODMn, which is included non-biodegradable matters, is difficult to decrease only using by conventional biological treatment facilities and T-N is affected by non-point source, etc. The results of assessment on 3 years BOD5 indicate that most of the unit watersheds were being improved except Yeongbon A, Seombon C and Yocheon B. In addition, it was found that T-P were also being improved except Yocheon B and Hwangryeong A. Consequently, water qualities of the unit watersheds have been improved in many cases since the TMDLs.
박재홍 ( Jae Hong Park ),류덕희 ( Doug Hee Rhew ) 한국물환경학회(구 한국수질보전학회) 2018 한국물환경학회지 Vol.34 No.2
Small-scale wastewater discharge facilities account for 98% of all workplaces, but in the generation and emission of major pollutants, they account for 27.5 % and 23.5 %, respectively. Since the proportion of the emission load of the small-scale workplace is not large, the national environmental policy has been established mainly around large-scale wastewater discharge facilities. However, in the case of specific hazardous substances in water, the amount of the discharge load of the small-scale wastewater discharge facility was 2.4 times higher than that of the generation load. Certain types of specific hazardous substances in water, which have a higher discharge load than large-scale wastewater discharge facilities, account for 24 ~ 32 %. There are also cases in which the discharge load from a small-scale discharge facility is more than four times higher, depending on the specific kind of water pollutant. As a result of inspections, the violation rate of the small-scale wastewater discharge facility among the total violations by facilities is 93.9 ~ 97.5 %. As a result, the ecotoxicity value of small-scale wastewater discharge facilities was high in most industries, and there was a fluctuation in the measured value. This indicates that the ecological integrity of the water system can be largely influenced by small-scale wastewater discharge facilities. Therefore, it is necessary to expand the environmental management of small-scale wastewater discharge facilities, and in some cases, the effect of the improvement in quality may be more significant than in the management of large-scale wastewater discharge facilities.
비모수 경향분석법 적용을 통한 금강수계 총량관리 단위유역의 수질변화 연구
김은정 ( Eun Jung Kim ),김용석 ( Yong Seok Kim ),류덕희 ( Doug Hee Rhew ),류지철 ( Ji Chul Ryu ),박배경 ( Bae Kyung Park ) 한국물환경학회 2014 한국물환경학회지 Vol.30 No.2
In order to assess the effect of TMDLs management and improve that in the future, it is necessary to analyze long-term changes in water quality during management period. Therefore, long term trend analysis of BOD was performed on thirty monitoring stations in Geum River TMDL unit watersheds. Nonparametric trend analysis method was used for analysis as the water quality data are generally not in normal distribution. The monthly median values of BOD during 2004∼. 2010 were analyzed by Seasonal Mann-Kendall test and LOWESS(LOcally WEighted Scatter plot Smoother). And the effect of Total Maximum Daily Loads(TMDLs) management on water quality changes at each unit watershed was analyzed with the result of trend analysis. The Seasonal Mann-Kendall test results showed that BOD concentrations had the downward trend at 10 unit watersheds, upward trend at 4 unit watersheds and no significant trend at 16 unit watersheds. And the LOWESS analysis showed that BOD concentration began to decrease after mid-2009 at almost all of unit watersheds having no trend in implementation plan watershed. It was estimated that TMDLs improved water quality in Geum River water system and the improvement of water quality was made mainly in implementation plan unit watershed and tributaries.
경험식과 요인분석을 통한 오염물질 유출 특성 연구-남한강 상,하류 수계 주요 하천을 중심으로
박지형 ( Ji Hyoung Park ),손수민 ( Su Min Sohn ),류덕희 ( Doug Hee Rhew ) 한국물환경학회 2011 한국물환경학회지 Vol.27 No.6
This study was conducted to characterize the discharge feature of pollutant load from the upper and lower watershed influencing on the water quality of South Han River using the empirical equation and Factor Analysis. The results of regression analysis between flow rate and pollutant load were as follows. In the streams of the upper watershed of South Han river, BOD5 and CODMn were increased as the flow rate was increased. Also, steep increases in SS and TP were observed with positive correlation with the flow rate while change in TN was slightly shown. On the other hand, in the streams of the lower watershed of South Han river, BOD5 was negatively correlated with the flow rate, being decreased with the increase in the flow rate. However, changes in CODMn, TN, SS, and TP showed a similar trend with those observed in the upper watershed. With Factor Analysis of the water quality and various components, it was appeared that the flow rate, SS, and TP were significantly correlated each other and they were indicated as the principal component influencing on water quality in the streams of the upper watershed. In contrast, BOD5, CODMn, and TOC were significantly correlated each other and they were included as the principal pollution component of the streams in the lower watershed. From these results, it was conclusive that the upper watershed of South Han River was mainly affected by non point source pollutants while the lower watershed was influenced by point source pollutants from the developed areas.
BASINS/HSPF 모형을 이용한 수질오염총량관리 유달율 산정방법 연구
박주현 ( Ju Hyun Park ),황하선 ( Ha Sun Hwang ),류덕희 ( Doug Hee Rhew ),권오상 ( Oh Sang Kwon ) 한국물환경학회 2012 한국물환경학회지 Vol.28 No.6
In this study Window interface to Hydrological Simulation Program-FORTRAN (HSPF) developed by the United States Environmental Protection Agency (EPA) was applied to the upstream of Namgang watershed to estimate its applicability for estimating Delivery Ratio (DR) of water pollutants for Total Maximum Daily load (TMDL). BASINS/HSPF which is selected in this study, is found to be appropriate for simulation of daily flow and water quality in target basins. DR was estimated utilizing discharge loads of unobserved sub-basin and delivery load of unobserved locations obtained not by actual evaluation but by simulation through validation and verification. Annual average DR of BOD, TN and TP were 0.97~1.50, 2.23~3.21, and 0.81~1.09 respectively. NET DR of dependent basins excluding influence of upstream basin was 1.50~1.70, 0.55~0.69, and 0.24~0.31, all of which are lower than those of independent basins area. Utilizing the model selected by this research, DR and Net DR of unobserved basins will be estimated, which will help determine priorities in management of basin area.