대한해협의 수온 및 염분의 시간적 변동

박청길,Park, Chung Kil 한국해양학회 1972 韓國海洋學會誌 Vol.7 No.1

The observations of hourly change of salinity and temperature were made in the Korea Strait from August 1968 to July 1969. The largest hourly change of salinity and temperature was shown in August and the smallest in April. The range of hourly change of temperature (5.67-15.75$^{\circ}C$ on the depth of 125m) and salinity (32.1-34.3 on 20m layer) were significantly wide in August. These changes are correlated with the movement of water masses vertically and horizontally caused by changing direction and force of the current.

한국동해의 용존산소 분포의 특성에 관한 연구

박청길,Park, Chung Kil 한국해양학회 1979 韓國海洋學會誌 Vol.14 No.2

The characteristics of distribution of dissolved oxygen off the east coast of Korea were studied. The oxygen minimum layer was not clearly appeared on the vertical distribution of dissolved oxygen through the year. The dissolved oxygen content of the proper cold water of Japan Sea was 5.1-6.0ml/l which is very higher than those of the North Pacific region, and it means that the speed of transportation of a new and oxygen rich water from surface to deeper layer is relatively fast. Water masses in east coast of Korea can be classified by using of O$\_$2/-Salinity relations.

천연수중 구리 및 카드뮴의 화학종 예측

박청길,김은식,Chung Kil Park,Un Sik Kim 대한화학회 1985 대한화학회지 Vol.29 No.6

To predict speciation of copper and cadmium in natural waters, the stability constant of complexes formed between copper or cadmium and natural organic ligands have been determined by the ion selective electrodes at pH 6. The stability constants for copper and cadmium, log $K'_{CuL} = 5.80\;and\;log K'_{CdL}=3.82$, were incorporated inot MINEQL computer program and prediction of chemical species of copper and cadmium in a model fresh water system was made by using this computer program. The natural organic ligands form complex with cupric ions at the concentration of $10^{-6}$ moles/l and with cadmium ions at the concentration of $10^{-5}$ moles/l. This result showed that prediction of chemical species of heavy metals in natural waters was not possible without taking into account the presence of the natural organic ligands. 천연수중에 들어간 구리 및 카드뮴이 천연수중의 각종물질들과 상호작용하여 어떤 화학종으로 존재하게 될 것인가를 예측하기 위하여 금속과의 착화반응에 관한 자료가 아직까지 잘 알려져 있지 않은 천연유기물과 구리 및 카드뮴간의 착화물의 안정도 상수를 측정하였다. 이온 선택성 전극을 사용하여 pH6에서 전위차 적정법으로 구한 천연유기물과 구리 및 카드뮴 간의 착화물의 안정도 상수는 각각 log $K'_{CuL} = 5.80,\;log K'_{CdL}=3.82$였다. 이 값을 MINEQL 컴퓨터 프로그램의 자료에 새로이 넣고 모델 하천수에 대하여 전연유기물의 존재를 고려했을 때와 고려하지 않았을 때의 구리 및 카드뮴의 화학종을 계산하여 비교 검토해 보았다. 천연유기물이 $10^{-6}M$ 정도만 있어도 구리와 착화물을 형성하였으며 카드뮴의 경우는 천연유기물이 $10^{-5}M$ 정도 있으면 착화물을 형성 함으로서 천연유기물이 금속들의 화학종 분포에 상당히 영향을 미치고 있음을 알 수 있다.

낙동강 하구 부근의 해양환경 조사 연구

박청길 ( Chung Kil Park ),조규대 ( Kyu Dae Cho ),허성회 ( Sung Hoi Hun ),김삼곤 ( Sam Kon Kim ),조창환 ( Chang Hwan Cho ) 한국어업기술학회 1986 수산해양기술연구 Vol.22 No.4

도로변 인접 토양중의 납 , 카드뮴 , 아연 및 구리의 함량분포 특성

박청길(Chung Kil Park),이군자(Goon Ja Lee),유선재(Sun Jae You) 大韓環境工學會 1985 대한환경공학회지 Vol.7 No.1

낙동강 8개보 건설이 부영양화에 미치는 영향과 저감방안

박청길(Chung Kil Park) 한국생태공학회 2016 한국생태공학회지 Vol.5 No.1

As the storage capacity of water is increased by the constraction of the weirs increased residence time of 18 days and decreased dilution rate of 0.054/day. As the specific growth rate of 1.03/day of Microcystis is 20 fold greater than the dilution rate of 0.054/day of weirs promote eutrophication of the Nakdong River. All of the stations was over eutrophication stage except the Sangju station where concentartion of total phosphorus was not exceeded 0.05 mg/L which is the standard of eutrophication stage in a stationary stream. The reduction measures of eutrophication in the Nakdong River are to open the flood gate of weirs and to reduce the concentration of total phosphorus below 0.05 mg/L.

낙동강에서 chlorophyll - a 와 BOD 의 상관관계

신성교,박청길,이수웅 ( Sung Kyo Shin,Chung Kil Park,Su Woong Lee ) 한국물환경학회 1996 한국물환경학회지 Vol.12 No.4

The relationships between chlorophyll-a(Chl.a) and BOD were investigated through culture and degradation study of phytoplankton and field samples to determine the autochthonous BOD caused by the phytoplankton production in the eutrophic waters in the Nakdong River. The correlation coefficients between Chl.a and BOD, and Chl.a and COD were found to be 0.732 and 0.666 respectively. From the results of culture and degradation of phytoplankton in laboratory, the correlation coefficients between Chl.a and BOD were 0.876(mean value), and 0.968 respectively. Therefore, it was possible to express as TBOD = α. chl.a + allochthonous BOD, and to determine the contribution of autochthonous BOD to total BOD in the Nakdong River. It was found that the percentages of autochthonous BOD in total BOD were 51.7, 47.9, 65.2, 30.5 and 52.6 % at Mulgum, Namji, Jukpo, Koryong and Waekwan. The converting factor(α) for the calculation of autochthonous BOD was depended upon the biomass of phytoplankton as well as the activity, which was changed in accordance with waters conditions. It was found to be 0.042, 0.036, 0.047, 0.029 and 0.048 at Mulgum, Namji, Jukpo, Koryong and Waekwan.

식품공장 폐수의 BOD , COD , TOD 및 TOC 값들 간의 상관관계에 관한 연구

김성재,박청길(Chung Kil Park) 大韓環境工學會 1982 대한환경공학회지 Vol.4 No.1

생태계 모델을 이용한 황해의 환경용량 산정

김광수,박청길,조은일 ( Gwang Su Kim,Chung Kil Park,Eun Il Cho ) 한국물환경학회 1996 한국물환경학회지 Vol.12 No.4

The distributions of residual flows and dissolved oxygen concentration in the Yellow Sea were simulated and reproduced by an eco-hydrodynamic model which is composed of a three-dimensional hydrodynamic model and an ecosystem model. In order to estimate the environmental capacity of the Yellow Sea, the simulations for predicting the situation of unfavorable environment such as the formation of oxygen-deficient water mass in bottom layer were performed by controlling quantitatively the pollution loads of rivers flowing into the Yellow Sea. The field surveys and the seawater analyses were conducted over the Yellow Sea in summers, 1993 and 1994. The computed residual flows showed the counter-clockwise water circulation to exist in the surface and middle levels and no evident water circulation in the bottom level of the Yellow Sea. In the simulation of water quality with an ecosystem model, the more the pollution loads of 14 major rivers flowing into model region increase, the more evident appear the reductions of dissolved oxygen concentrations around the adjacent areas of estuaries receiving pollutants. In case the pollution loads of all 14 rivers become 7∼10 times as high as the present loads, the concentration of dissolved oxygen appears to be reduced to 5.0㎎ /ℓ or less in the bottom level of the water area being located eastward 60∼120㎞ away from the Changjiang estuary. Therefore, in order to keep the concentration of dissolved oxygen being 5.0㎎O₂/ℓ and above, which is the Korean criterion of the third class seawater quality, the environmental capacity of the Yellow Sea may be estimated to be 7∼10 times as high as the present pollution loads.

해양오염의 진단을 위한 생화학적 오염지표에 관한 연구 IV. 황해산 도다리 (Pleuronichthys cornutus)의 지질성분의 변화

최진호,김동우,박청길,김재일,양동범,CHOI Jin-Ho,KIM Dong-Woo,PARK Chung-Kil,KIM Jae-Il,YANG Dong-Beom 한국수산과학회 1997 한국수산과학회지 Vol.30 No.4

해양오염의 진단을 위한 생화학적 오염지표 설정의 기초연구의 일환으로서 오염이 심각한 서해산 (황해) 도다리 (Pleuronichthys conutus)의 혈액의 지질성분을 분석 평가하였다. 서해안의 자연산 도다리의 혈액중의 헤모글로빈의 함량은 동해안 포항의 자연산 도다리 대비 $15\~30\%$의 현저한 감소현상이 나타나서 서해안의 내해 (內海) 뿐만 아니라 외해 (外海)의 오염도 상당히 심각함을 알 수 있었다. 서해안의 자연산 도다리의 혈청중의 중성지질 (TG)의 함량도 포항의 자연산 도다리의 혈청중의 TG의 함량 대비 $15\~50\%$나 유의적으로 높았다. 서해안 자연산 도다리의 혈청중의 총콜레스테롤의 함량은 포항의 자연산 도다리의 혈청중의 총콜레스테롤의 함량 대비 아산과 서산은 $20\~25\%$나 높았지만, 격포나 보령은 차이가 없었다. 서해안의 자연산 도다리의 혈청 중의 LDL-콜레스테롤의 함량도 각각 $15\~35\%$나 유의적으로 높았지만, HDL-콜레스테롤의 함량의 증가는 거의 인정할 수 없었다. 또한 서해안의 자연산 도다리의 동맥 경화지수는 포항의 자연산 도다리의 동맥경화지수 대비 각각 $10\~60\%$의 유의적인 증가효과가 인정되었다. 질병이나 노화와 함께 증가되는 것으로 알려진 인지질에 대한 총콜레스테롤의 함량비 (T-Chol/PL ratio)는 서해안의 자연산 도다리의 T-Chol/PL비가 포항의 자연산 도다리의 T-Chol/PL비와 거의 유사한 값을 나타내고 있었다. 이상의 결과에서 볼 때 서해안의 자연산 도다리의 오염도 서해안의 넙치와 마찬가지로 병적상태로 오염의 정도가 상당히 심각할 것으로 판단된다. 이러한 사실은 서해안의 수질환경이 공장폐수 및 육상오수의 유입, 그리고 농약 등의 오염원에 노출되어 있다는 사실을 알 수 있다. This study was designed to investigate the biochemical pollutant marker for diagnosis of marine pollutions by the changes in lipid components of the flounder (Pleuronichthys cornutus) in the Yellow Sea of Korea. Hemoglobin levels in serum of wild flounders in the yellow Sea were significantly lower $(15\~30\%)$ than those of wild flounder in Pohang (control) of the East Sea. Triglyceride (TG) contents in serum of wild flounders in the Yellow Sea were higher $(15\~50\%)$ than those of wild flounder in Pohang. Total and low density lipoprotein (LDL)-cholesterol contents in serum of flounders in the Yellow Sea were significantly higher $(20\~25\%\;and\;15\~35\%,\;respectively)$ than those of wild flounder in Pohang. Atherogenic index (Al) in serum of wild flounders in the Yellow Sea were significantly higher $(10\~60\%)$ than these of wild flounder in Pohang but T-Chol/PL ratios showed almost no change in serum of flounders in the Yellow Sea we examined. These results suggest that near-coastal water as well as neritic water of the Yellow Sea might be affected by pollutant input.