만경강 상류 수질 및 식생분포와 토양환경에 따른 하천식생의 종 다양성

이경보,김창환,이덕배,김종구,박찬원,나승용 한국환경농학회 2003 한국환경농학회지 Vol.22 No.2

만경강 상류유역 수질 및 하천식생 군락 변화를 조사 분석하여 수질에 따른 하천식생의 종 다양성 및 토양요인에 따른 종 다양성의 변화를 평가하기 위하여 2001년 6월부터 2002년 9월까지 만경강 상류유역 5개 조사지점을 선정한 후 조사를 실시하였다. 수질중 T-N의 농도는 전주천과 삼천에서 높았으며, 겨울철에 전주천에서 7.45 mg/L로 가장 높았다. 무기태 질소 성분벽 함량은 NH₄-N 경우 고산천과 소양천 유역은 0.01~0.06 mg/L 범위로 계절별 커다란 차이가 없는 낮은 농도를 나타냈으나, 생활하수가 유입되는 전주천과 삼천에서는 0.77~3.01 mg/L로 계절별로 큰 차이를 보였다. T-P의 농도는 계절별로 비슷하였으나 전주천에서 겨울천에 0.89 mg/L로 가장 높았다. 계절별 BOD의 농도는 고산천과 소양천 유역에서 0.92~2.14 mg/L를 나타내었으나 생활하수가 유입되는 유역에서는 2.01~7.65 mg/L범위를 보였다. SO₄²^(-)의 농도는 농업용수 수질기준인 50 mg/L를 초과하는 지역은 없었으며 소양천에서 다소 높았다. 만경강 지류인 고산천에서 조사된 식물은 59과 과 129속 165종 20변종으로 총 185종류가 조사되었으며, 소양천에서 조사된 식물은 53과 111속 141종 19변종으로 총 160종이었고, 전주천 하류에서 조사된 식물은 37과 68속 86종 15변종으로 총 103종이었다. 그리고 삼천에서 조사된 식물은 32과 92속 110종 18변종으로 총 128종류 조사되었으며, 만경강 본류인 하리유역에서 조사된 식물은 73과 134속 218종 33변종으로 총 251종류가 조사되었는데 식물의 생활형에 따라 분류하면 침수식물이 13종, 부엽식물이 5종, 부유식물이 2종, 추수식물이 26종, 수생식물이 46종, 습생식물이 47종으로 조사지점중 이 지역의 식생이 가장 다양하였다. 식물사회학적 방법에 따라 분류된 하천식생의 식물군락은 10개의 수생식물 군락과 2개의 습생 및 수변식물 군락으로 대별되어졌다. 이들 군락들에 대한 4종류(종수, 종의 풍부도지수, 종의 이질성지수, 종의 균등도지수)의 종 다양성과 토양요인(pH, EC, 유기물 함량, 전질소, 인삭)과의 관계를 분석한 결과 pH가 높을수록 4종류의 종 다양성 지수는 높아 졌으며, EC는 값이 높을수록 종수(SN), 종의 풍부도지수(SR), 종의 이질성지수(H'), 종의 균등도지수(J')가 낮아 졌다. 또한 유기물 함량(OM)과 전질소(T-N)의 경우도 4종류의 다양성지수와는 부의 상관관계를 나타내었다. 인산(P₂O_(5))은 4종류의 다양성 지수의 변화에 영향을 미치지 않았다. This study was conducted to evaluate influence of chemical properties in the riparian on the species diversity and to get plant information for enhancement of natural purification in Mankyeong River. The concentration of total nitrogen was high in Jeonju and Sam stream, while that of total nitrogen showed the highest peak in Winter. Concentrations of NH₄-N was 0.01-0.06 ㎎/L in Gosan and Soyang stream. The water quality of upstream along with Mankyeong River was suitable for the imgation source. The riparian vegetation was investigated by Zurich-Montpellier school's method from June, 2001 to September, 2002. The number of riparian plants were 59 families, 129 genera, 165 species, 20 varieties in Gosancheon, on the while 53 families, 111 genera, 141 species, 19 varieties in Soyangcheon The number of riparian plants in Hari basin was higher than that of other sites namely, 73 families, 134 genera, 218 species, 33 varieties. Riparian vegetation was consisted of 12 plant communities. The contents of organic matter, total nitrogen and electrical conductivity had negative relationship with species diversity (Species richness index, Heterogeneity index, Species evenness index, Species number). On the while, species diversity had positive relationship with soil pH. Species diversity of the plant communities were affected by topography and disturbance.

황토와 생석회의 혼합비율에 따른 축산폐수 처리에 관한 연구

김보국,신은섭,원찬희 全北大學校 附設 都市및環境硏究所 1999 都市 및 環境硏究 Vol.14 No.1

This study was conducted in order to investigate removal efficiency of turbidity, organic matter, nitrogen and phosphorus to reduce environmental pollution of treatment livestock wastewater with mixed proportion of loess and lime. The result of study, the removal of turbidity, COD_Cr and T-P increased along the dosage, and was to be fixed above the appropriate dosage. In the removal turbidity, the appropriate mixed proportion of loess and lime was Loess:Lime = 3:7, the appropriate dosage was 30g. In the removal COD_Cr, T-P and TKN was Loess:Lime = 3:7, 30g, Loess:Lime = 5:5, 20g, Loess:Lime = 5:5, 40g, respectively.

식도에 발생한 원발성 소세포암 1예

류보열,김태종,곽재정,김영학,박찬국,김만우,이승일,기근홍 조선의대 1995 The Medical Journal of Chosun University Vol.20 No.2

白雲山 成熟林木伐採作業地에서 伐出直後 野生動物과 土壤微小動物相의 變化

禹保命,朴在鉉,朴贊烈 서울大學校 農業生命科學大學 農業開發硏究所 1995 서울대농학연구지 Vol.20 No.2

道路橋 Prestressed Concrete 合成 1桁의 最適斷面

李普炯,徐鎭國,金炅燦 嶺南大學校工業技術硏究所 1992 연구보고 Vol.20 No.2

The series of standardized sections of prestressed concrete I-girders for highway bridge are analyzed and characteristic relations are derived for the section parameters and applicable girder spans. The validity and the applicability of the equations are investigated with the following observations: 1. The parabolic relations exist between a pair of section parameters and applicable spans in the form of Np*h=c1+c2L+c3L2. 2. The validity of given designs is checked by comparing the design spans with the spans caculated from the equations using the given section parameters. 3. The section profiles are determined to suit given design terms by selecting grider heights and tendons in this equation. This paper thus presents formula for readily establishing the validity of given designs, and selecting section profiles to satisfy given design terms for prestressed concrete composite highway bridge.

집적화된 실리콘 압력센서의 출력전압 보상파라미터 추출 및 그 특성

이보나,김건년,박효덕,신상모,이경탁,김찬,권혁채,이상조,박현주 경북대학교 센서기술연구소 1998 센서技術學術大會論文集 Vol.9 No.1

An integrated silicon pressure sensor has been designed, fabricated and tested. The signal conditioning circuits were designed to include calibration and temperature compensation of output voltage through trimming of diffusion and ion-implanted resistors. Before trimming of resistors, the compensation parameters such as pressure sensitivity, temperature coefficient of pressure sensitivity, temperature coefficient of piezoresistors and pressure sensitivity of piezoresistors were measured. Then offset voltage, span, and temperature coefficients of offset voltage and span were calibrated by trimming of resistors. The measured output voltage met our design specification and simulation value above room temperature. But, the measured output voltage at -30°C deviated from our design specification and simulation value because the offset voltages were found to vary randomly as a function of temperature.

고정화 백색부후균을 이용한 제지폐수처리

金保局,元燦熙 全北大學校 附設 都市및環境硏究所 1996 都市 및 環境硏究 Vol.11 No.1

The discharge of papermill wastewater has been continuously increased from 512,000 ㎥/day in 1987 to 735,000 ㎥/day in 1994. The method used for treating this type of industrial wastewater has been an activated sludge process, which may be the most effective and widely used form of biological wastewater treatment, but this method causes some operational problems when it is applied for treating a papermill wastewater: i. e.) 1) activated sludge processes are efficient for reducing BOD removal but are not effective in reducing COD level due to a higher fraction of NBDCOD caused mainly by celluloses and lignins, 2) the extra sludge production is too much. It is known that lignins can be soundly degraded by Phanerochaete chrysosporium called "a white rot fungi". Treating papermill wastewater using an immobilized Phanerochaete chrysosporium would give some relative benefits: 1) it can reduce a significant fraction of NBDCOD of the papermill wastewater, 2) the sludge production can be reduced. The results of this study can be used to provide not only new and innovative design parameters for prototype treatment process but also to renovate the existing treatment facilities. The results of this study are follows; 1) Nutrient(P) injection had no significant effect on the removal efficiency. 2) The operational condition that could keep the national discharge limit of effluent("Na" zone, less than COD_Mn 90㎎/ℓ and less than BOD_5 80㎎/ℓ) was about 0.33㎏-BOD_5/㎥·day or less, and was required for the same limit more than 8 hours of hydraulic time. 3) The sludge produced from treating one cubic meter of papermill wastewater was about 0.001 ∼ 0.06 ㎏/㎥, which is much less than the amount of activated sludge produced.

지역별 오존농도 조사자료의 비교 : 부산시를 중심으로 the city of Busan

전보경,유수영,최금찬 동아대학교 환경문제연구소 2002 硏究報告 Vol.25 No.1

This study was to charaterize the concentrations of the spring and summer seasons for ozone. Ozone measured using the O3 Analyzer(49C, TEI.). Samples were measured from April to May, 1937 and from July to August, 1998. Five areas were investigated in Busan of which measured sites were Seomyeon, Sasang, Geumjeong, Yeongdo, Guseodong. Ozone concentrations in industry area(Sasang) were higher than the other sites. The maximum concentration is 0.038 ppm and the minimum is 0.012 ppm in this site

익산지역 강수성분의 연차적 변이

이경보,이덕배,이상복,김재덕,박찬원 한국환경농학회 2006 한국환경농학회지 Vol.25 No.1

백색부후균 Phanerochaete chrysosporium의 고정화에 관한 연구

金保局,元燦喜 全北大學校 附設 都市및環境硏究所 1996 都市 및 環境硏究 Vol.11 No.1

One of the important things for biological wastewater treatment is to maintain microorganism to high concentration purely. For this, a white rot fungus, Phanerochaete chrysosporium is immobilized because it is known that lignin, nondegradable substances of the papermill wastewater, can be degraded soundly. The purpose of this study is to find an appropriate mixing ratio of immobilized Phanerochaete chrysosporium and filling ratio when a reactor is operated. The results of this study are follows; 1) The ratios of mixture between 2:1, 1:1, 1:2 white rot fungi Phanerochaete chrysosporium with PVA had a little effect on respiration rates. The amount of suspended solid produced from 2:1 ratio was negligible and the stability of the mixture was also good at 2:1. 2) The maximum removal efficiency was obtained when the filling rate was 25%.