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다변량통계분석을 이용한 수질오염총량관리 단위유역별 오염물질 배출특성 분석 -한강수계를 중심으로-
최옥연 ( Ok Youn Choi ),김기훈 ( Ki Hoon Kim ),한인섭 ( Ihn Sup Han ) 한국물환경학회 2015 한국물환경학회지 Vol.31 No.6
The characteristic of the water quality and pollutant discharge was analyzed at the units watershed of the total amount management in Han-river basin, and after classified in a similar area by multivariate statistical analysis, the main trend such as the water quality trend and pollutant discharge characteristic were analyzed. As a result of this study, the density of the pollutant at the unit watershed is not necessarily identified as discharge density, and the primary management watershed and targeted substances were analyzed depending on the operating status of the environmental infrastructure in watershed and the main pollution factor and discharge path per pollutants. As a result of cluster analysis, watersheds were classified into four groups according to discharge characteristics. It will be used when selecting target area of primary management that is appropriate to the characteristics of each river and establishing efficient water quality improvement plans.
수질오염총량관리 대상물질 확대를 위한 한강수계 하천수질 경향 및 수질특성 분석
최옥연 ( Ok Youn Choi ),김홍태 ( Hong Tae Kim ),서희승 ( Hee Seung Seo ),한인섭 ( Ihn Sup Han ) 한국물환경학회(구 한국수질보전학회) 2017 한국물환경학회지 Vol.33 No.1
Based on the existing pollutant emission standards which are armed at the pollutant concentration of each pollution source, the government formulated and implemented a new management system of total water-pollutant emission. By virtue of this new management system, pollution-loading amount of individual watershed could be controlled, which achieved the requirements of water-quality management, such as TP and BOD. In initiate stage of its implementation, BOD was selected as the object of water-quality management, since we need to consider the continuity of water-quality data and established pollutant-management laws and policy. During the ongoing management, TP management was added into the system, since BOD management alone was not enough. However, the frequency of algae bloom in Han river showed the same trend, even though TP was treated as additional control target. Therefore, this paper will analyze different water-quality parameters and characteristic of water quality, in order to serve as a reference for watershed management of water quality, by which the applicable management period and target pollutant can be selected in the future.
수질오염총량관리 단위유역별 오염물질 배출부하량 특성분석 -금강수계를 대상으로
박준대 ( Jun Dae Park ),최옥연 ( Youn Choi Ok ),오승영 ( Seung Young Oh ) 한국물환경학회 2012 한국물환경학회지 Vol.28 No.6
Water quality management should be focused on the pollution concentrated area so that the improvement of water quality can be achieved effectively for the management of Total Maximum Daily Loads (TMDLs). It is necessary to consider discharge characteristics in the TMDL plan. This study analysed discharge characteristics such as pollution generation and discharge load density, and reduction potential by each unit watershed, and categorized the unit watershed into four groups according to its discharge load characteristics. This analysis can be used as helpful information for the prioritization of pollution reduction area and selection of pollution reduction measures in the development of TMDL plans.
유병로 ( Byong-ro Ryu ),최옥연 ( Ok-youn Choi ) 한국환경기술학회 2006 한국환경기술학회지 Vol.7 No.4
본 연구는 대전광역시를 대상으로 생활용수의 현장표본조사를 통하여 회귀율 및 원단위를 산정한 것이다. 2004년 5월부터 2005년 4월까지의 자료수집기간을 거쳐 미시적방법과 거시적 분석방법을 통해 회귀율을 분석하여 다음과 같은 결론을 얻었다. 생활용수의 미시적 회귀수량 분석 결과 단독주택 지역의 회귀율은 88.0%, 87.3%, 아파트 지역의 회귀율은 93.5%, 93.1%, 상가지역의 회귀율은 89.8%, 91.3%로 나타났다. 또한 계절별 회귀율을 분석한 결과 겨울철에 높은 회귀율을 나타냈으며, 여름철에는 낮은 회귀율을 보였다. 생활용수의 거시적 회귀수량 분석 결과 120.2%로 산정되었다. 이는 대전시의 하수관거 보급률이 94.4%에 달하며, 하수관거의 부식과 노후 그리고 시내권 밖의 합류식 관거로 유입되는 침입수로 인한 것이라고 판단되며, 지하수 이용량 등이 정확히 파악되지 못했기 때문으로 판단된다. The recurrence rate of municipal water use has been studied by using micro and macro analysis of Daejeon metropolitan city near Keum river. After analyzing micro recurrence rate of water use, the recurrence rate of housing area is 88.0% and 87.3%, the recurrence rate of apartment is 93.5% and 93.1%, and the recurrence rate of commercial area is 89.8% and 91.3%. Based on seasonal recurrence rate, the recurrence rate in winter is higher than in summer. After analyzing, macro recurrence rate of public water is 120.2%. This result seem to be 94.4% diffusion rate of sewage discharge, corrosion or outwearing of sewage discharge, and invading water from outside of city due to confluent type of Sewage. The amount of underground water consumed was not grasped accurately as well.
수질오염총량관리 관거월류부하 변화에 따른 배출부하량 산정방법
박준대 ( Jun Dae Park ),오승영 ( Seung Young Oh ),최옥연 ( Ok Youn Choi ) 한국물환경학회 2011 한국물환경학회지 Vol.27 No.3
The quantity of a discharge load can change with changes in rainfall in the area with a combined sewer system (CSS). To evaluate the implementation appropriately in the management of total maximum daily loads (TMDLs), the effects of rainfall changes should be considered in the estimation of the discharge load. The rainfall condition for the estimation of the discharge load in a certain year should be standardized to the same rainfall condition as that of the reference year. However, the calculation process is very complicated with its potential limitations. This study investigated and developed relatively simple methods for estimating the discharge load. Load conversion method (LCM) is designed to convert the discharge load under the current rainfall condition into that of the reference rainfall conditions. Simple rainfall data method (SRDM) is to simplify the estimation process of the discharge load by the simple conversion of rainfall data. These methods were applied to calculate the discharge load and examine the estimation results. From the results of this study the application of these methods may be useful for estimating the discharge load in the TMDL process.
수질오염총량관리 단위유역의 유량변화 특성분석 -금강수계를 대상으로-
박준대 ( Jun Dae Park ),오승영 ( Seung Young Oh ),최옥연 ( Ok Youn Choi ) 한국물환경학회 2011 한국물환경학회지 Vol.27 No.6
The variation of streamflow is regarded as one of the most influential factors on the fluctuation of water quality in the stream. The characteristics of the variation should be taken into account in the plans for the management of Total Maximum Daily Loads (TMDLs). This study analysed and characterized spatial distribution and temporal variation of streamflow at each unit watershed in Guem-river basin. For the analysis of the distribution of streamflow, the type and the extent of the distribution were investigated for the unit watershed. For the analysis of the variation, short and long term changes of streamflow were examined. The result showed that most of the distributions were not log-normalized and the extent of variation tends to be greater at the unit watershed placed on the tributaries in the basin. A kind of margin could be granted to the unit watershed involving high variations so as to establish the water quality goal and load allotment more reasonably and effectively in view of whole waterbody.
총량관리 단위유역의 토지이용 변화 및 오염물질 배출형태 분석
박준대 ( Jun Dae Park ),오승영 ( Seung Young Oh ),최옥연 ( Ok Youn Choi ) 한국물환경학회 2014 한국물환경학회지 Vol.30 No.2
The land use of the unit watersheds should be maintained appropriately in order to keep the load allotment stable for the management of Total Maximum Daily Loads (TMDLs). This study classified the land area in four types and analyzed the use of each land type and its changing pattern by calculating the occupation and conversion ratios for the unit watersheds in three river basins. The forest land showed the greatest occupation ratio with 63.0%, followed by the farm land with 23%, the other area with 8.0% and the site area with 6.0% in 2003. The occupation ratio of the site and the other area increased by 0.4% and 0.2% respectively, and that of the farm and the forest land decreased by 0.4% and 0.2% respectively in 2007. The conversion ratio for the site area ranged from 1.65% to 1.97%, for the farm land from -0.47% to -0.33%, for the forest land from -0.10% to -0.04% and for the other area from 0.17% to 1.97%. It can be inferred that the decrease in the farm and the forest land contributed to the increase in the site area and that the increase in the other area was mainly made by the decrease in the forest land. It could be more effective to take into account the changes in the site area and in the forest land in the process of developing the TMDL plans.