• Korean Journal of Fisheries and Aquatic Sciences
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• v.17 no.6
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• pp.549-556
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• 1984

Forty-eight fish species belonging to 38 genera and 10 families were collected along the Dongjin River from July 1982 to May 1984. The dominant species of them were Rhinogobius brunneus and Zacco platypus in the main stream and Abbottina springeri, Hemiculter eigenmanni and Moroco oxycephalus in the tributaries respectively. It was remarkable point in the distributional study of freshwater-fishes of Korea that both species of Pelteobagrus nitidus and Lefua costata were observed in the present studied areas for the first time. It was found that 6 species of Hypomesus olidus, Hemiculter eigenmanni, Pseudobagrus sp., Liobagrus mediadiposalis, Cobitis taenia striata, and Lepomis macrochirus inhabiting the seomjin River were unstably incorporated into the fish communities at the upper reaches of the Dongjin River which the Seomjin River flow down for the water power generation. It is suggested that the integradation between two subspecies of C. taenia occurs at the intermediate water areas in the mainstream of the Dongjin River, whereas C. t. striate is remained only at the upper reaches and C. t. lutheri is lived in the lower parts of the river. Population of C. koreensis found in the mainstream was exhibited considerable differences in the color patterns on the body sides of them in comparison with other populations, which was discussed in relation to the habitat variations adapted to the confluent condition of joining the Seomjin stream with the Dongjin River.

• Korean Journal of Breeding Science
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• v.40 no.4
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• pp.447-451
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• 2008

'Goamibyeo', a mid-late maturing ecotype with high amylose content in kernels, was developed by the rice breeding team of National Yeongnam Agricultural Experiment Station(NYAES) in 2000 and released in 2001. This variety was derived from the three way cross of Milyang 95//Kimcheonaengmi/$2^*Ilpumbyeo$ (in 1992 summer) through the pedigree breeding method and designated as 'Milyang 168' in 1997. The heading date of 'Goamibyeo' was Aug. 18 in ordinary season with culm length of 85 cm. However, 'Goamibyeo' showed susceptible to bacterial leaf blight, stripe virus and leaf blast disease. The amylose content of 'Goamibyeo' in milled rice kernels is about 26.7% with translucent and clear in chalkness. Thus, 'Goamibyeo' is expected to be used as a source grain for rice noodle industries. The milled rice yield potential of 'Goamibyeo' is about 5.38 MT/ha in local adaptability test of three years and it would be adaptable to Yeongnam plain of Korea.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.42 no.1
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• pp.42-48
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• 1997

Ten days old rice seedlings were treated with NaCl and the contents of endogenous hormones such as GA$_3$, ABA, IAA and zeatin were measured by ELISA. Water content and seedling growth were decreased as the salt concentration was increased. GA$_3$ increased up to 24 hours after NaCl treatment and decreased thereafter. ABA was raised by four times in 48 hours after NaCl treatment. IAA and zeatin decreased as the NaCl concentration and duration of treatment increased. GA$_3$ and ABA showed positive and negative correlation with the water content in the plant tissue, respectively.

• Proceedings of the Korea Water Resources Association Conference
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• 2019.05a
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• pp.424-424
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• 2019

수질오염 저감을 위한 유기물질의 처리를 위해 생물학적 처리에 중점을 둔 하 폐수 처리시설의 증가에 따라 BOD로 대표되는 생분해성 유기물질은 꾸준히 감소하였으나, COD농도의 경우 뚜렷한 감소를 보이지 않고 있다. 유기물질 중 특히 난분해성 물질의 증가는 상수원으로 사용되는 하천의 경우 조류 증식 등을 유발하고 여과공정에 영향을 미쳐 상수처리의 효율을 떨어뜨리는 등의 환경적인 문제를 야기할 수 있다. 기존 BOD, COD로 대표되는 유기물질의 경우 각 유기물질별 상관관계 및 유출특성 등에 대한 연구는 많이 이루어졌으나, 난분해성 물질에 대한 조사는 상대적으로 미진한 실정이다. 특히 동진강수계는 '새만금 제2단계 수질개선종합대책' 등 장기적인 수질개선 대책들이 추진되면서 하천의 BOD5 및 TP는 감소추세를 보이고 있으나, COD는 개선되지 않고 증가하는 추세를 보이고 있다. 동진강의 말단부의 경우 COD/BOD5의 비율이 지속적으로 증가하는 추세를 보이고 있어 상대적으로 난분해성 유기물질에 대한 관리의 중요성이 대두되고 있다. 이러한 COD 및 COD/BOD5의 증가 추세는 국내 4대강에서 전반적으로 나타나고 있는 추세로서, 정부는 2013년부터 하천 및 호소의 생활환경기준에 TOC 항목을 도입하여 2016년부터 호소환경기준의 대표항목을 COD에서 TOC로 대체하였으며, 폐수배출시설에 대해서도 점차적으로 확대 적용할 계획으로, 난분해성물질을 포함하는 총유기물질 관리를 위해서 수질 및 수생태계 환경기준에서 유기물질에 대한 환경기준을 BOD5와 COD에서 TOC로 변경하는 정책을 추진 중에 있다. 본 연구에서는 동진강 유역의 본류 및 지류에서 TOC등 유기물질의 시공간적인 분포와 오염원별 배출특성을 현장조사를 통해 조사 분석하였다. 조사 시기는 건기시, 강우시로 구분하여 수행하였으며 조사항목은 일반수질항목, 유기물질 항목, 유기물질 성상 분석 등에 대하여 수행하였다. 난분해성물질 관리를 위한 기초자료확보를 통하여 새만금호의 수질개선 및 목표수질 달성에 기여 할 것으로 판단된다.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.51 no.spc1
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• pp.12-20
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• 2006

This study was carried out to investigate the relationship between each quality characteristics and changes of grain quality according to storage temperature and moisture contents of rough rice of Dongjin 1 and Siodongjinbyeo. Respiration rate of rough rice and fat acidity of brown rice were increased with moisture contents of rough rice and storage temperature. Germination rate of rough rice was the highest at $17{\sim}18%$ moisture contents of rough rice stored at low temperatures for 12 months. Germiation rate of the stored at low temperature after 16 months was up to 80% however the rate of $13{\sim}14%$ moisture contents of rough rice stored at room temperature was severely decreased to below the 10%. Gloss value of cooked rice was increased with moisture contents of rough rice and the lower storage temperature. Fat acidity of brown rice was lower in Sindongjinbyeo than Dongjin 1 at the lower storage temperature. Sensory score of cooked rice of Sindongjinbyeo which stored at low temperature for 16 months was better than Dongjin 1 and excllent at $17{\sim}18%$ moisture contents of rough rice. Correlations between sensory score of cooked rices and color b value of brown rice, gloss value of cooked rice and color L value of brown rice were significant 0.731**, 0.625*, and 0.615*, resectively, and were also positively significant correlated with break down, peak viscosity, pasting temperature, and fat acidity of brown rice -0.864**, -0.795**, -0.786**, and -0.779**, respectively.

• Food Science and Preservation
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• v.12 no.4
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• pp.310-316
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• 2005

This study was carried out to investigate the quality characteristics by packaging materials and storage temperature to predict safe storage period for milled rice. Mechanical taste value and whiteness of milled rices stored at room temperature were severely decreased than those of the stored at low temperature, but fat acidity and b value of those at room temperature was rapidly increased than those of stored at low temperature. Milled rice packed in LDPE film bag were smelled stale flavor after 4 months storage at room temperature, Hojinbyeo was not produced flour in the rice grain surface but Dongjinbyeo was showed production of flour. pH of milled rice of Dongjinbyeo and Hojinbyeo packed in LDPE film bag were the lowest showing 5.3 and 5.6, respectively after 6 months at mom temperature. Safe storage period of Dongjinbyeo and Hojinbyeo packed in craft paper bag were 1 month at room temperature, those of packed in LDPE film bag were 2 months. At low temperature safe storage period of Dongjinbyeo and Hojinbyeo packed in craft paper bag were 2 months, those of packed in LDPE film bag were 5 and 4 months, respectively.

• The Korean Journal of Quaternary Research
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• v.9 no.1
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• pp.19-32
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• 1995

한반도 서해 만경강-동진강 하구역 조간대 퇴적층의 수직층서 퇴적상 변화를 분석 하여 퇴적과정을 기초해양환경의 관점에서 해석하였다. 본 연구해역 저 조선의 퇴적층은 사 질함량이 우세한 반면 방조제와 인접한 만조선의 퇴적층은 실트질이 우세하였고 상층과 하 층의 퇴적물이 뚜렷하게 구분되었다. 사질퇴적층의 내부퇴적구조는 괴상구조, 평행층리 및 사층리 구조등이 우세하며 니질퇴적층에서는 모래/니질 교호엽리구조가 우세하다. 본 연구 의 결과 만경강-동진강 조간대 퇴적층서는 인근의 방조제 축조에 다른 퇴적환경 변화에 크 게 영향받은 것으로 해석된다, 즉 방조제축소 이전 고에너지의 퇴적환경에서 집적되었던 사 질퇴적층이 방조제축조 이후에는 저에너지 환경조건에서 집적된 니질퇴적물로 피복된 것으 로 해석된다.

• Proceedings of the Korea Water Resources Association Conference
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• 2017.05a
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• pp.297-301
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• 2017

본 연구에서는 새만금유역과 호 내의 복잡한 수체 형상, 유입 및 유출 구조를 반영하는데 적합한 모델을 적용하고 재현성이 검토된 모델 결과를 이용하여 호 내 수질을 모의하였다. 또한 구성한 모형의 결과를 바탕으로 만경강, 동진강의 상류에 위치하고 있는 제수문에서의 방류조건을 가정하여 모의를 수행하였다. 방류조건별 모의 결과, M3, D5지점에서 목표수질을 초과하는 것으로 나타났고 새만금호 상류부인 M3, D3지점은 방류조건에 따른 수질개선효과가 큰 것으로 예측되어 만경강과 동진강의 유입수의 영향이 지배적인 것으로 평가되었다. 전량방류시 영향범위를 거리로 살펴보면 만경강대교에서 새만금호 하류방향으로 약 22 km지점, 동진강대교에서 새만금호 하류방향으로 약 15 km지점까지로 나타났다. 농도변화와 방류조건별 영향범위를 살펴보면, 하류측으로 갈수록 수질개선에 영향을 적게 미치지만, 증가된 방류량에 의해 수질이 개선되어 제수문에서의 방류량 증가는 호 내 수질개선에 기여하는 것으로 판단된다.

• Korean Journal of Ichthyology
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• v.13 no.1
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• pp.40-49
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• 2001

The ichthyofauna and fish community of the Dongjin River system were surveyed at 21 sites from October 1998 to September 1999. We confirmed the presence of 53 species in 14 families belonging to seven orders. Thirty-two species of cyprinid fishes accounted for 60.4% of the total, four species of cobitid and gobiid fishes 7.5% of the total, and two species of bagrid and centrarchid fishes for 3.8% of the total. The dominant species in the Dongjin River system was Zacco platypus (relative abundant 26.0%), the subdominant species was Carassius auratus (14.7%). The dominant and subdominant species in each stream of the Dongjin River system were determined. In the Dongjin River, the dominant species was Z. platypus (40.6%), the subdominant Acheilognathus lanceolatus (20.5%); in Wonpyeong stream, Pseudorasbora parva (22.6%) and Hypomesus olidus (13.2%); in Gobu stream C. auratus (67.5%) and Cyprinnus carpio (15.4%). Fourteen of the 53 species from the the Dongjin River system comprised 28.6% of the total Korean endemic species; seven rare species accounted for less than 0.1% of the total. Four exotic fish species were found: Cyprinus carpio (Islaeli carp), Carassius cuvieri, Micropterus salmoides and Lepomis macrochirus. The species dominance, diversity, and evenness index of the fish community from the Wonpyeong stream were 0.12, 1.08, and 0.91, respectively, indicating better conditions than those of the Dongjin River and the Gobu stream. The fish community of the Wonpyeong stream showed closer relationship to that of the Dongjin River than to that of the Gobu stream.

• 베이커리
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• no.7 s.396
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• pp.130-132
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• 2001