유기염소계 잔류농약이 제주도 연안 해양환경에 미치는 영향

오윤근,김정호 ( Youn Keun Oh,Jung Ho Kim ) 한국물환경학회 1997 한국물환경학회지 Vol.13 No.3

To obtain the effects of residual organochlorine pesticides in the coastal environment on the Cheju Island, the ocean environment of Cheju city and Wimi was surveyed in May, August and October 1996. The qualification defection concentration of captan, chlorothalonil and dicofol of organochlorine pesticides in the water were 0.009ng/㎖, 0.005ng/㎖ and 0.023ng/㎖ by GC-ECD, respectively. The qualification defection concentration of captan, chlorothalonil and dicofol of organochlorine pesticides in the plant and animal were 0.018ng/g, 0.010ng/g and 0.046ng/g by GC-ECD, respectively. Captan, chlorothalonil and dicofol of organochlorine pesticides used in the farm were not detected in any water, sediment, seaweed cava(Ecklonia Cava), Agar(Gelidium amansii), turban sell(Batillus cornutus) and sea urchin(Anthocidaris Crassispina). The coastal environment in the cheju island was not effected the captan, chlorothalonil and dicofol of organochlorine pesticides used in the farm on cheju island

조석에 따른 제주도 동부지역 염지하수의 수질특성

오윤근 제주대학교 해양연구소 2000 해양과환경연구소 연구논문집 Vol.24 No.-

The salinization of groundwater is widely known as one type of water contamination in all over the coastal area. To investigate this salinization of groundwater, the various approaches are needed because its characteristics is widely changed from area to area and from time to time, depending on the aquifer conditions. The purpose of this study is to investigate the physical and chemical characteristics of salinization of groundwater at the east area of Jeju island. For this purpose, the major ions of groundwater, are analyzed according to the well depth and tidal levels. The results obtained from this study are summarized as follows : At D -28 well, the deeper the well depth, the greater the degree of water quality fluctuation with tidal levels. However. this phenomenon is appeared inversely at D-124 well. This difference is due to the existence of the specific permeation structure such as cracks and joints at the same level with mean sea level at their location. It is found that time la9 between tidal level and the fluctuation of water quality is 2∼2.5 hours at D-28 well. and 3∼3.5 hours at D-124 well. As the depth of well is deeper. the concentrations of major ions are increased, excepting the case of NO3- originated from the land sources.

휴가철 고속도로 통행시간 변동성 변화분석 연구

오윤근,김도경,김준원,한동희 한국ITS학회 2015 한국ITS학회 학술대회 Vol.2015 No.10

제주도내의 용출수 및 지하수를 정수처리하였을 때 Trihalomethanes 생성에 관한 연구

오윤근,송영철 대한환경공학회 1997 대한환경공학회 학술발표논문집 Vol.1997 No.12

조석에 따른 제주도 동부지역 염지하수의 수질특성

오윤근 제주대학교 해양연구소 2000 해양자원연구소연구보고 Vol.24 No.-

The salinization of groundwater is widely known as one type of water contamination in all over the coastal area. To investigate this salinization of groundwater, the various approaches are needed because its characteristics is widely changed from area to area and from time to time. depending on the aquifer conditions. The purpose of this study is to investigate the physical and chemical Characteristics of salinization of groundwater at the east area of Jeju island. For this purpose. the major ions of groundwater. are analyzed according to the well depth and tidal levels. The results obtained from this study are summarized as follows: At D-28 well. the deeper the well depth, the greater the degree of water quality fluctuation with tidal levels. However. this phenomenon is appeared inversely at D-124 well. This difference is due to the existence of the specific permeation structure such as cracks and joints at the same level with mean sea level at their location. It is found that time lag between tidal level and the fluctuation of water quality is 2-2.5 hours at D-28 well. and 3-3.5 hours a t D-124 well. As the depth of well is deeper. the concentrations of major ions are increased. excepting the case of NO_(3)^(-) originated from the land sources.

淸州市의 氣候

오윤근 청주대학교 사회(지리)교육학과 1978 上黨地理 Vol.- No.2

제주도 동부지역 地下水의 鹽水化와 理化學的 特性

오윤근,김경훈,류성필 한국환경과학회 2000 한국환경과학회지 Vol.9 No.3

The purpose of this study is to investigate the physicochemical characteristics of salinization of groundwater at the estern area of Cheju island. For this purpose, the major ions of groundwater. spring water are analyzed. The concentration of Cl^- and Na^-+K^- contained in the groundwater at near the coastline are higher than those at inland area away from the coastline. The water quality components of groundwater observed at this area can be classified into 4 types such as Na-Cl, HCO_3, Na-Cl-HCO_3 and Ca-HCO_3. The concentration ratio of SO_4^- to Cl^- is 0.1354(R^2=0.972) at this area. This value is very similar with Dittomer's ratio of 0.13. For Na^-, K^-, and Mg^2+ versus Cl^-, their ratios also show a significant relationship between sea water and groundwater in this area. From the chloride-bicarbonate ratio, it can be estimated that the intrusion distance of seawater from coastline to inland area is 2.8km at Onpyung-Nansan, Sangdo and Pyungdae areas, and 5.4㎞ at Kosung-Susan area. The mixing ratio between seawater and fresh water by the intrusion of seawater is decreased with the distance toward inland from coastline. This ratio(fresh water : seawater) is 80:20 in spring water adjacent the coastlines, Onpyung area and 99.8:0.2 in the well at No.3 of Susan located at inland away from the coastline. The concentration of Na^- observed at field is 25∼45% lower than that theoretically calculated by this mixing ratio. Based on the data of EC, the equipotential line of 500μmhos/㎝ is located at 4∼5㎞ point at Kosung-Susan area and 2.5㎞ point at the other area. The equation of correlation between Cl^- concentration and EC values is Cl^-=0.1927EC-16.683 for the area lower than 500μmhos/㎝ and Cl^-=0.2773EC for the area beyond 500 μmhos/㎝.

$\delta$$^{15}$ N값을 이용한 제주도 지하수중의 질산성질소 오염원추정에 관한 연구

오윤근,현익현 한국지하수토양환경학회 1997 지하수환경 Vol.4 No.1

제주도 지하수중의 $\delta$$^{15}$ N값을 이용하여 질산성질소의 오염원을 추정하기 위해 질산성질소농도가 먹는물 최대허용농도를 초과하거나 초과할 우려가 있는 지역중 7개 지점을 선정했으며, 대조지역으로 질산성 질소가 1 mg/ι 미만인 1개 지역을 선정하였다 질산성질소의 오염원은 $\delta$$^{15}$ N와의 관계를 비교하여 자연토양, 화학비료, 가정하수, 축산폐기물이나 퇴비등에서 유래되는 것으로 구분하였다. 질산성 질소농도와 $\delta$$^{15}$ N에 의한 주요 기원별 구성비에서는 A-1, R 및 F-1이 각각 61.1%, 50.0% 및 20.0%가 축산분뇨.생활하수 로 27,8%, 45.7% 및 40.0%가 화학비료로 11.1%, 4.3% 및 40.0%가 자연토양으로 구별되였고, A-2에서 A-6은 각각 37.8%, 25.0%, 40.9%, 26.2% 및 35.7%가 축산분뇨.생활하수로 2.6%, 3.3%, 6.1%, 2.3% 및 4.1%가 자연 토양으로 59.6%, 71.7%, 53.0%, 71.5% 및 60.2%가 화학비료로 추정되었다. This study was carried out to find out the source of nitrate-nitrogen (NO$_3$-N) contamination in the groundwater in Cheju Island. Among the sites which have exceeded or may exceed the criterion level (10 mg/L) of NO$_3$-N in drinking water, seven sampling sites including two reference sites were chosen. The former regions are mainly agricultural ones (A-1 to A-6) and residential (R). The latter regions are forest (F-1 and F-2). The predicted major source and its contribution to NO$_3$-N concentration at each site, using $\delta$$\^$15/N and NO$_3$-N concentration, were as follow; Those at A-1, R and F-1 was 61.1%, 50.0% and 20.0% to manure or domestic sewage, 27.8%, 45.7% and 40.0% to chemical fertilizers and 11.1%, 4.3% and 40.0% to natural soil, respectively. Those at A-2 to A-6 were 37.8%, 25.0%, 40.9%, 26.2% and 35.7% to manure or domestic sewage, 59.6%, 71.7%, 53.0%, 71.5% and 60.2% to chemical fertilizers and 2.6%, 3.3%, 6.1%, 2.3% and 4.1% to natural soil, respectively.

화학물질이 환경에 미치는 영향

오윤근,O, Yun-Geun 환경보전협회 1988 환경정보 Vol.10 No.1

동해선 민통선 및 DMZ 지역의 하천현황

오윤근,O, Yun-Geun 한국하천협회 2007 하천과 문화 Vol.3 No.3