• Proceedings of the Korea Society of Environmental Biology Conference
• /
• 2002.05a
• /
• pp.41-41
• /
• 2002

• Korean Journal of Ecology and Environment
• /
• v.34 no.3 s.95
• /
• pp.199-205
• /
• 2001

This study was investigated to the assessment of organic pollution using attached diatom assemblages in the Shinchon stream on April, June, September and December 1999. Diatoms were identified total 74 taxa which composed of 68 species, 4 varieties and 2 unidentified species. The Centrales were 5 taxa and Pennales were 69 taxa. Dominant species were Navicula subminuscula, Navicula saprophila and Nitzschia palea which were saprophilous taxa to organic pollution. N. palea was dominant species at st. $1{\sim}3$ on April, June and September and N. subminuscula was recorded as dominant species at st. 4 on June, September and December. N. saprophila was dominated only at station 4 on April. DAIpo values were ranged $0.4{\sim}15.3$ at all stations from April to December and the water qualities were polysaprobic states except to ${\alpha}-mesosaprobic$ state at st. 1 on June. If Navicula sp. was identified as saprophilous taxa, DAIpo value of this station will be 3.5 and water quality of the station will be polysaprobic state. This stream was assessed the water qualities of polysaprobic states.

• Proceedings of the Korean Society for Applied Microbiology Conference
• /
• 1979.10a
• /
• pp.234-236
• /
• 1979

인구의 도시집중과 고도산업사회 건설에 필연적으로 수반되는 도시하수 및 산업폐수등은 하천을 심각하게 오염시켜 하천수가 지니고 있는 자정능력 한계를 초과하고 있어 재생될수 없는 상태이므로 수자원의 보호가 요청된다. 이런 상황의 하천오염 증가 추세와 주요 오염원 및 오염물에 대하여 고찰하고 대책에 방향을 제시한다. 먼저 전국의 급수 현황과 장래를 보면 다음과 같다. 한편 수도권 한강수계를 오염시키는 주요 오염원인 폐수를 보면 주거지의 생활하수, 상업행위로 발생되는 폐수와 공장의 산업폐수로 대별할 수 있으며 수도권 한강에 유입 되는 지천 수질을 보면 다음과 같다. 위와 같은 상태의 총폐수량은 280만톤인데 비하여 청계, 중량하수처리장과 서부 북부 동부분뇨처리장의 일일 처리능력은 16.4%에 불과하다. 한편 서울지역 오염원구성비를 보면 다음과 같다. 이런 계속적인 오염물은 1977년 경우 갈수기에 80~100t/sec의 하천유량으로 희석되고 있어 자정능력 한계를 벗어나서 하류의 물은 혼탁하고 용존산소의 고갈현상을 초래하고 있다. 그러므로 도시 하천에서는 수류침체로 인한 하상퇴적을 방지하여 국소적 오염의 심화를 방지하며 유량을 증가 시켜야 한다. 수도권 한강 수계의 수질의 일부는 다음과 같다. 한편 생활수준의 향상과 더불어 수요가 급증되며 처리장의 효율과 하천수의 수질을 악화시키는 합성세제의 총생산량은 1971년에 21000톤이던 것이 1978년에는 약 50,000톤에 이르고 있으며 이중 55~60%가 서울지역에서 소모되는 것으로 추산되어 진다' 결과 한강수에서 검출되는 합성세제의 오염 현황을 보면 다음과 같이 이미 몇개 지점에서는 세계 보건기구의 허용량인 0.5ppm을 초과 하고 있는 실정이다. 또한 오염의 연쇄현상을 나타내는 중금속의 일종인 csduium의 검출 정도를 보면 다음과 같다. 이상의 하천오염에 따른 수중생태계의 변화는 물리적 화학적 생물학적 환경요인이 복합적으로 작용하는 세부적 기계에 대하여는 규명되지 않은 문제가 아직도 많으며 지표생물의 표현형은 중요한 가치를 부여하고 있다. 식물성 plankton의 우점종의 출현 빈도에 따른 수질계급을 보면 뚝섬지역 BOD 3.3~5.3 빈부수성 $~\alpha$ 중부수성, 보광동 BOD 6.0~10.3중부수성, 제 2한강교 BOD10~28 $\alpha$ 강부수성, 난지도 BOD29 $\beta$ 강부수성 등이며 이와 상이한 결과도 보여주고 있다. 이상으로 볼 때 1) 가정하수의 질을 높이기 위하여 분뇨정화조 의 효율증대 2) 산업폐수의 공정별 폐수량의 조절 및 폐수성 상에 따른 총량규제에 대비한 효율증대 3) 하천의 오염부하와 자정능력 최대한 부여 4) 폐수처리를 위한 미생물제개발 및 오염지표 종 연구와 오염내성 생물의 연구등이 종합적 으로 수행되어야 한다. 5) 이상의 모든 조사와 연구결과를 객관적으로 표기할 수 있도록 하천의 이정표가 정해져야 하겠다.

• Korean Journal of Ecology and Environment
• /
• v.45 no.1
• /
• pp.1-10
• /
• 2012

The Jinwi stream, which is located in the Gyeonggi Province, shows a large variation in water quality from the upper stream to downstream. Therefore the Jinwi stream is suitable for assessing changes to the benthic macroinvertebrate community structure according to saprobity. This study was conducted to find out the applicability of biotic indices for water quality pollution through an analysis of the correlation between water quality and benthic macroinvertebrate indices for the Jinwi stream. Along with the pollution of water, the species composition of Ephemeroptera decreased, while that of Annelida increased. The ecological score for the benthic macroinvertebrate community (ESB) showed more significant correlations than any other biotic index (H', DI, R1, J, EPT and KSI) with the water quality items.

• Korean Journal of Ecology and Environment
• /
• v.40 no.3
• /
• pp.468-480
• /
• 2007

The urbanization is altering the hydrology, water quality, channel form of waterway and changing the composition of biological communities in the aquatic ecosystem. Recently, towns grew bigger by the drift of large numbers of people and the medium and small leather and dyeing industries around the Pocheon and Youngpyeong streams. The discharges of sewage were increased by them. The UII (urban intensity index) was 85 (st. P-3) and 91 (st. P-6) in the Pocheon stream and about 20 in the Youngpyeong stream. A total 141 taxa of epilithic diatoms which were composed of 2 order, 8 family, 30 genera. Dominant species were Navicula saprophila, N. subminuscula, Nitzschia palea, Gomphonema pseudoaugur in the Pocheon stream and Achnanthes alteragracillima, A. convergens, A. minutissima, N. minima, N. fonticola, N. frustulum and Cymbella minuta var. silesiaca in the Youngpyeong stream. It Showed the different composition of dominant species by the urbanization near two streams. In the relationships between UII and environmental factors such as EC, BOD, COD, TN, TP and DAIpo, UII showed the high relations $(r^2>0.8)$. It was the difference of organic pollution according to urbanization. It therefore, was higher the relative abundance and more the numbers of saprophilous taxa in the Pocheon stream than the Youngpyeong stream. The water quality of two streams by biological indicators(DAIpo) was polysaprobic state(st. P-3, P-4, P-5) in the Pocheon stream and was oligosaprobic (Y-1), mesosaprobic (Y-2, 3) and polysaprobic state (Y-4) in the Youngpyeong stream during the investigation periods.

• Korean Journal of Environmental Biology
• /
• v.22 no.1
• /
• pp.242-245
• /
• 2004

This study was conducted to assess water quality of Dae stream in Busan using the periphyton. Species of the higher rank 10% in standing crops were Cymbella ventricosa, Aulacoseira granulata, Gomphonema olivaceum, Synedra ulna through the study. In addition, Fragilaria intermedia ill the station 1 and 2, and Nitzschia palea in the station 3 and 4 dominated the periphyton community respectively. These species mainly appeared in the urban stream. Where input of pollutant is forecasted, standing crops of dominant species are investigated very highly. Also, standing crops of Nitzschia palea were higher in the pollution area such as polysaprobic than any other area. Water quality by the saprobic index were oligosaprobic in the station 1, $\beta$-mesosaprobic in the station 2 and 3, and $\alpha$- mesosaprobic in the station 4. These results suggests that the pollution of Dae stream gradually increased with downstream due perhaps to the loading of sewage from the new residental complex.

• Journal of Life Science
• /
• v.29 no.5
• /
• pp.580-587
• /
• 2019

Benthic macroinvertebrates were analyzed in March, June, September, and December 2018 to evaluate water quality in the Songji River in Sacheon-ci, Korea. The identified benthic macroinvertebrates included 447 individuals belonging to 20 species, 18 families, 12 orders, 5 classes, and 3 phyla. Various ecological parameters were estimated for evaluation of the river status. The total ecological score of benthic macroinvertebrate community (TESB) varied from 17 (Station D) to 41 (Station A). The saprobic index and ecological score of benthic macroinvertebrate community (ESB) for the evaluation of river status revealed a water quality evaluation at Station A of II (oligosaprobic), indicating some satisfactory water protection. The benthic macroinvertebrate index (BMI) varied from 25.207 (Site C) to 39.348 (Station A). The evaluation of the river status at Stations C and D was polysaprobic, and sensitive taxa were absent. The mean Shannon-Weaver index (H') of diversity varied from 1.288 (Station D) to 2.250 (Station A). The classification of saprobity based on H' was ${\beta}$-mesosaprobic at Station A and ${\alpha}$-mesosaprobic at the other stations. The value of geometric density was varied from 1.229 (Station A) to 2.071 (Station D), with a mean of 1.582. An artificial load is being added to this river. One of load is the rectal river construction which flows straight through the river physics. Thus, the environment of living organisms deteriorates due to insufficient water. In order to secure the quality of the Songji River and a good environmental habitat, several low-height stepped-beam structures are required.