• 한국습지학회지
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• 제14권2호
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• pp.223-235
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• 2012

본 연구에서는 '09년' 환경부의 비점오염저감시설 모니터링 및 유지관리 시범사업으로 건설된 강우유출수 처리목적의 인공습지 침강지에서 퇴적특성 및 설계 적정성에 대하여 조사분석 하였다. 본 연구대상 인공습지가 설치된 지역에는 대규모 우사가 산재해 있으며 인공습지는 가축사육지역에서 발생되는 강우유출수를 처리하기 위하여 설치되었다. 퇴적물의 발생양은 강우량 및 강우강도에 영향을 받아 결정되며 유입유량의 크기에 따라 지점별 퇴적량이 결정되는 것으로 나타났다. 퇴적물의 성분분석결과 영양염류의 경우 일반 농촌지역 인공습지 대비 연구대상 습지의 농도가 10배 높은 수치로 분석되었고 주변토양과 중금속함량을 비교한 결과 Tatal-Pb, Total-As는 비슷한 수준을 보이고 있으나 Total-Cu의 경우 축산단지의 영향을 받아 높은 수준의 함량을 나타내었다. 연간 퇴적물 발생량을 추정한 결과 중량으로는 13톤, 퇴적깊이는 약 23cm, 체적기준 $65m^3$이었고 현재의 기준을 바탕으로 준설시기를 산출하였을 때 약 2.7년 정도로 조사되었다. 한편 침강지의 구조는 고유량시(강우시) 발생하는 세굴을 감안하여 현재와 같은 장방형 구조가 아닌 쐐기형 구조가 적합한 것으로 판단된다.

• 한국습지학회지
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• 제14권2호
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• pp.265-275
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• 2012

최근에 기후변화와 수질관리의 중요성이 증가하면서 습지토양의 탄소와 영양물질 보유 특성에 대한 관심이 증가되고 있다. 본 연구에서는 연안퇴적물과 인공습지, 자연습지(내륙, 하구, 갯벌)와 같이 연안퇴적물 및 다양한 유형의 습지토양에서의 유기물과 영양물질의 보유특성을 알아 보고자하였다. 또한 유기물, 영양물질, 입도에 따른 상관관계를 분석하여 이들 항목 간의 연관성을 살펴보았다. 연구 결과 유기물이나 영양물질의 보유정도가 습지의 유형에 따라 달라지는 것으로 나타났는데 내륙습지가 하구나 연안습지보다 질소의 보유 능력이 큰 것으로 나타났으며, 같은 육상생태계에서도 더 오랜 기간 동안 오염물질이 유입되고 자체적으로 유기물을 생산하여 축적하고 있는 자연습지에서 유기물과 질소의 농도가 인공습지보다 더 높은 것을 조사되었다. 연안지역의 경우 해수의 흐름이 원활한 하구나 갯벌 보다 해수의 유통이 느린 만 지역에서 유기물과 질소 농도가 높게 나타났다. 또한 화학적산소요구량은 총유기탄소 및 총질소농도와 높은 상관관계를 보여주어 화학적산소요구량 자료를 이용하여 해당 습지의 총유기탄소나 총질소 농도를 효과적으로 추정할 수 있음을 보여주었다.

• 한국물환경학회지
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• 제22권6호
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• pp.1031-1037
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• 2006

In order to improve water quality of the Juam Lake, a constructed wetland was implemented and operated for 2 years with the effluent of sewage treatment plant and diffuse pollutant discharged from agricultural area. During the summer season, average removal efficiencies for BOD and SS were 15.8% and 39.4%, respectively. Due to the mixed effect of vegetation, soil microbes and sediments, the higher nutrient removal efficiencies were obtained: average T-N and T-P removal efficiencies were 64.2% and 71.7%, respectively. The concentration of sediment was increased initially, and maintained constant throughout monitoring period. The highest nitrogen and phosphorus uptake were observed in Phragmites japonica. The nitrogen uptake was estimated as 0.235 DW mg/g while phosphorus uptake was estimated as 2.059 DW mg/g.

• 한국미생물학회:학술대회논문집
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• 한국미생물학회 2005년도 International Meeting of the Microbiological Society of Korea
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• pp.199.1-199
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• 2005

• Journal of Ecology and Environment
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• 제29권5호
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• pp.453-460
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• 2006

Upo wetland is the largest inland wetland in Korea as Ramsar Convention Area. The purposes of the study were to investigate the levels of heavy metals (Cd, Cr, Cu, Ni, Pb and Zn) in the sediment and Cipangopaludina chinensis malleata from three sites of the wetland and to assess the potential of the gastropod as a bioindicator for heavy metal levels. The gastropods were dissected into shell and soft tissue without the digestive and excretive organs. The levels of Cd, Cu and Pb were below the guideline of Soil Environment Conservation Act and the heavy metals except Cr were slightly different among the sites. Cd was higher in Upo site ($0.32{\mu}g/g$) than Sajipo site ($0.28{\mu}g/g$). Cu and Zn showed the highest value in Sajipo as $43.5{\mu}g/g\;and\;39.8{\mu}g/g$, respectively while the concentrations of Pb and Zn were the highest in Upstream as $58.8{\mu}g/g\;and\;138{\mu}g/g$, respectively. In the soft tissues and shells of the gastropod, the overall common trend in the concentrations of the heavy metals was revealed with the following order: Zn > Cu > Cr > Ni > Pb > Cd and Ni > Zn > Cr > Cu > Pb > Cd, respectively. Although the soft tissues exhibited higher concentrations of the heavy metals except Ni than the shell in the gastropod, the levels of Cd and Pb in the gastropod were generally below the restrictive values set up by Korea Food & Drug Administration. From Duncan's Multiple Range Test (DMRT) results, the concentrations of Pb and Zn in the sediments among the sites were reflected on the soft tissue (Pb) and the shell (Pb and Zn) of the gastropod in the same order. The lower value of coefficient of variation (CV) in Pb concentration of the shell than in that of the soft tissue supports the usefulness of the shell as a bioindicator for Pb pollution. Although the CV value in the shell was a little higher than in the soft tissue, DMRT results and the stability of incorporated Zn into the shell support the use of the shell of the gastropod as a potential bioindicator for long-term contamination of Zn.

• 한국환경과학회지
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• 제12권2호
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• pp.133-137
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• 2003

The Yellow River delta is an important region where coastal and newly formed wetlands distribute in north China. Based on satellite remote sensing images and GIS techniques, this paper tends to delineate the dynamic changes of newly formed wetland in the Yellow River mouth from 1986.5 to 1996.10. Our results show that the newly formed wetland increased by 24.9 $\textrm{km}^2$ per year. Before 1990. 1 and it decreased by 2.40 $\textrm{km}^2$ per year after that. The northern and southwestern parts of the Yellow River mouth are main positions of decrease and the southern and the estuary parts are main positions of increase. The advancing rate of river mouth extending into the Bo Sea is decreasing obviously. The reason for that is the decreasing of water and sediments in the Yellow River, which caused by the increasing use of water and soil conservation on upper reach.

• Journal of Ecology and Environment
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• 제42권4호
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• pp.150-154
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• 2018

In lotic wetlands, runner reed (Phragmites japonicus) plays a role as a pioneer, which helps other plant species to settle by making dense roots trapping floating-sediments. In lentic wetlands, on the other hand, P. japonicus could play a role as an invader threatening biodiversity by forming tall and dense stands. To conserve an abandoned paddy terrace in mountainous areas, a habitat of an endangered dragonfly species (Nannophya pygmaea), from the monotypic-occupation by P. japonicus, we applied three kinds of treatment: (1) hand-clipping in 2009, (2) mechanical excavating in 2012, and (3) planting of alternative vegetational unit in 2012. We have monitored vegetation changes in the wetland in 2008~2012 and 2017. Vegetation cover of P. japonicus sharply decreased from 43% in 2011 to 16% in 2012 by the mechanical excavation. After 5 years from applying the treatment, Schoenoplectiella mucronata that was utilized in the planting became the predominant species instead of P. japonicus and the number of wetland plant species increased from 16 to 25 with the shift in species composition. This study showed the utility of three control methods of P. japonicas in a lentic wetland.

• Membrane and Water Treatment
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• 제10권1호
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• pp.57-65
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• 2019

This study assessed the contribution of emergent vegetation (Phragmites australis, Typha latifolia, and Nelumbo nucifera) to the submerged surface area, the amount of biofilms attached to the submerged portions of the plants, and the treatment performance of a free water surface (FWS) constructed wetland. Results showed that a 1% increase ($31m^2$) in the vegetative area resulted in an increase of $220m^2$ of submerged surface area, and 0.48 kg Volatile Suspended Solids (VSS) of attached biofilm. As the vegetation coverage increased, effluent organic matter and total Kjeldahl nitrogen decreased. Conversely, a higher nitrate concentration was found in the effluent as a result of increased nitrification and incomplete denitrification, which was limited by the availability of a carbon source. In addition, a larger vegetation coverage resulted in a higher phosphorus in the effluent, most likely released from senescent biofilms and sediments, which resulted from the partial suppression of algal growth. Based on the results, it was recommended that constructed wetlands should be operated with a vegetation coverage of just under 50% to maximize pollutant removal.

• 한국습지학회지
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• 제2권1호
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• pp.69-85
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• 2000

Wetlands are generally thought to be among the most fertile and productive ecosystems of the world. They provide a variety of ecological functions to the landscape. In recent years there has been considerable research activity to generate more scientific documentation on the ecological functions of wetlands. Many pollutants released to the environment settle and accumulate in the silt and mud called sediment on the bottoms of wetlands. Contaminated sediment can cause adverse effects to aquatic organism and eventually to ecological system. Sediment toxicity test with water fleas has been done by standardized preparation method of pore and elutriate water methods described in the literature for the need to protect Woopo wetlands. The results of Daphnia magna, Ceridaphnia dubla and Simocephalus sp. toxicity test were compared and discussed in terms of the relative sensitivity and discrimination abilities with both pore and elutriate water obtained from the sediments of Woopo wetlands.

• 한국습지학회지
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• 제15권1호
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• pp.43-50
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• 2013

미국 캘리포니아 주의 Searsville 호수와 인근 생태습지의 지하수-지표수의 상호작용을 3차원 지하수 수치 모형을 사용하여 모의하였다. 특히, 호수 수위의 급격한 저하가 호수를 둘러싸고 있는 생태습지의 지하 수위를 어떻게 변화시키는지에 대해 초점을 맞추어 연구를 진행하였다. 모의 결과, 모형에 적용된 다양한 대수층의 수문지질학적 매개변수에 상관 없이 습지의 생태에 큰 영향을 줄 정도로 지하수위의 변화가 크지 않다는 결론을 도출하였다. 이러한 연구 결과는, 댐 및 보의 수문 개방, 가뭄 등으로 인한 지표수위의 급격한 저하에 따른 주변 생태습지에서의 지하수위 및 이에 큰 영향을 받는 생태계의 변화에 대한 유용한 정보를 제공할 수 있을 것이다.