• 한국환경교육학회지:환경교육
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• 제10권2호
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• pp.175-190
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• 1997

The objective of this study is to increase bio-diversity by developing more efficient methods to created habitats and applying them in introducing prototypes of forest, grassland, and marsh which are found in natural ecosystem, to urban environment. In this context, in creating man-made marsh in Seoul Engineering High School, firstly, philosophical framework to create man-made marsh to restore urban nature and conceptual system to create a region considering life and ecosystem were established. Secondly, by applying the philosophical framework and the conceptual system, water quality section, plantation section, and techniques to create habitats to increase bio-diversity were introduced. Lastly, when the creation is completed, maintenance of the marsh will continue with participation and education of students and residents. This study presents how natural environment can be restored and created in urban areas. This may be viewed as modest beginning. I expect this study proves to be effective in increasing bio-diversity, fulfill its role as an experiment station for restoration and creation of natural environment and natural educational center for students and community as well as habitats for wild life, and open a new chapter in developing a society seeking co-existence of humankind and life. Therefore, when technological guideline on restoration and creation of man-made marsh in urban area is developed based on the outcome of this study, expansion of the project to nationwide including metropolitan cities like Seoul is recommended.

• 한국환경생태학회지
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• 제7권2호
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• pp.104-111
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• 1994

덕유산 국립공원내 두문산 부근에 위치한 소택지내 식물생태계의 실태를 분석함으로서 추후 개발행위에 의한 소택지 식생의 변화동태 파악을 위한 자료를 제공할 목적으로 본 조사를 수행하였다. 본 조사지역내에 생육하는 식물의 종류는 39과 77속 74종 18변종 및 1 품종 등 총 93 종류가 기록되었다. 소택지내 초본 중에서 10 % 이상의 중요치를 보인 종은 골풀, 산괭이사초, 좁쌀풀, 세모고랭이, 솔방울고랭이, 동의나물, 흰사초, 산거울, 연리갈퀴, 애기나리 등 10 종류였고, 처녀치마, 노루오줌, 꽃마리, 쉽사리, 붓꽃, 일월비비추 등 습지성 초본류가 국소적 또는 전체적으로 흔하게 분포되어 있었다. 본 소택지의 특성은 비교적 습지를 좋아하는 다양한 종류가 소택지 전체에 걸쳐 국소적 우점을 의여 주고 있다. 본 조사지역은 덕유산 국립공원 지역에 있는 자연자원 중에서 매우 희소성을 지니고 있으며 현재 개발행위가 진행되고 있는 점에 비추어 앞으로 적극적인 보전과 관리대책이 필요하다고 판단된다.

• 산업기술연구
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• 제29권B호
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• pp.215-219
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• 2009

Based on the data interpretation on an artificial marsh built in Chun-cheon Lake, the study analyzed flow characteristics and found that flow was unstable due to sediment of natural river but the effect of artificial marsh was similar with that of river improvement works. Flow velocity in the section of artificial marsh was found to be 1m/sec. Therefore flow velocity was stable, which could contribute to improving water quality. A flow velocity as well as stream vector was improved.

• 한국경영정보학회:학술대회논문집
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• 한국경영정보학회 2008년도 춘계학술대회
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• pp.129-134
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• 2008

Dividend is one of essential factors determining the value of a firm. According to the valuation theory in finance, discounted cash flow (DCF) is the most popular and widely used method for the valuation of any asset. Since dividends play a key role in the pricing of a firm value by DCF, it is natural that the accurate prediction of future dividends should be most important work in the valuation. Although the dividend forecasting is of importance in the real world for the purpose of investment and financing decision, it is not easy for us to find good theoretical models which can predict future dividends accurately except Marsh and Merton (1987) model. Thus, if we can develop a better method than Marsh and Merton in the prediction of future dividends, it can contribute significantly to the enhancement of a firm value. Therefore, the most important goal of this study is to develop a better method than Marsh and Merton model by applying artificial intelligence techniques.

• ALGAE
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• 제23권3호
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• pp.219-230
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• 2008

The structure of phytoplankton community was studied for one year round at 6 stations in the Beopsu Marsh, Haman-gun, Gyeongsangnam-do, Korea. One hundred seventy-eight taxa (69 taxa belonging to Chlorophyta, 55 taxa to Bacillariophyta, 33 taxa to Cyanophyta, 15 taxa to Euglenophyta, 2 taxa to Rhodophyta, 2 taxa to Dinophyta and 1 taxon to Xanthophyta) were observed. Phytoplankton bloom occurred at the staions 2, 3 and 4 where waters were polluted by sewage and treated water of purification plants from the vicinity. The species diversity index of phytoplankton was the lowest (0.66) in November at the station 3, which the station showed the most eutrophic water due to the diverse pollutants from surroundings of the marsh. For the whole seasons, Fragilaria sp. and Euglena sp. appeared in pollutant water at the station 3, while Cyclotella sp. and Pinnularia sp. inhabited in relatively clean water at the station 5. To reserve the natural treasure, the wetland should be more specially managed by a local governing institution.

• 한국환경생태학회지
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• 제31권6호
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• pp.578-585
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• 2017

본 연구는 천연기념물 중에서 유일한 늪지식물인 제346호 함안 대송리 늪지식물을 대상으로 방문객의 문화재적 가치에 대한 인식현황과 활용 및 관리에 대한 요구도 등을 분석하여 향후 관리방안의 시사점 제공을 목적으로 한다. 방문객 인식현황을 분석한 결과 대상지의 인지도 및 인식수준은 전반적으로 낮았고 방문동기는 '자연 체험 및 교육', '휴식 및 여가', '문화자원 체험' 순으로 높게 나타났다. 인식수준에 따른 방문동기 차이를 분석한 결과 대상지에 대한 인식수준이 높거나 대상지의 문화재적 가치를 높게 평가하는 집단의 경우 단순 휴식 보다 '자연 체험' 또는 '문화자원 체험'을 위해 방문하는 경향이 높았다. 활용 측면에서는 안내판 등 관람, 편의를 위한 기본시설 및 적극적인 홍보에 대한 요구가 가장 높았고 늪지식물을 이용한 전통자원 발굴과 자연체험을 선호하는 것으로 조사되었다. 현행관리의 주요 방해요인으로는 지역주민과 일반 탐방객 모두 체계적인 관리정책 부재와 지역주민과의 소통 부재 등을 문제로 인식하는 것으로 나타났다. 적절한 관리방안을 모색하기 위해서는 지역주민을 포함한 다양한 이해관계자들의 협력을 통한 보존과 이용의 조화를 이루는 정책 수립 및 현장 적용이 필요하다고 인식하였다.

• Ocean and Polar Research
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• 제24권1호
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• pp.63-71
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• 2002

This preliminary study on the changes of macrobenthic assemblages in experimental sediment fences was conducted as a part of tidal marsh restoration project. Intertidal sediment fences were designed to increase the efficiency of trapping sediments on unvegetated tidal flats in order to raise sediment elevation and to allow colonization of intertidal vegetation. Although increment of soil surface level was not observed over the first three months of the study, it was possible to obtain some effects of the sediment fence. Three months later, the particle sizes of the surface sediment at experimental plots became much finer compared to unfenced areas on the natural mudflats located in the same tide level as that of the plots. The difference was much greater on the plot with drainage canals than on the plot without ones. Species diversity of the experimental plots became much higher than that of natural sites. Perinereis aibuhitensis and Glauconome chinensis which were absent from initial community appeared with high density in the plot with drainage canals. Those species were significantly different in abundance between the experimental plot and the natural mudflat. Changes in species composition were not detected in another experimental plot without drainage canals.

• 한국생물공학회:학술대회논문집
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• 한국생물공학회 2003년도 생물공학의 동향(XII)
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• pp.673-675
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• 2003

The antioxidant activities of methanol and dichloromethane extracts of eighteen salt marsh plants were tested by using 1,1-Diphenyl-2-picryl-hydrazyl(DPPH) at a $100{\mu}g/ml$ concentrations. The methanol extracts of four salt marsh plants(Rosa rugosa Thunberg, Erigeron annuus, Ixeris tamagawaensis kitamura, Artemisia capillaris Thunberg) were found to be most effective in DPPH radical scavenging activity. The DPPH radical scavenging effect of these plants was Artemisia capillaris Thunberg(88.67%), Rosa rugosa Thunberg(87.51%), Erigeron annuus(78.49%), Ixeris tamagawaensis kitamura(69.99%) in order and was comparable with that of natural antioxidant, L-ascorbic acid(96.64%). The next effective ones were the methanol extracts of Teragonia tetragonoides(58.66%) and the dichloromethane extracts of Artemisia capillaris Thunberg(54.67%) and the others did not show a considerable activity. These salt marsh plants were evaluated using the pyrogallol UV-VIS spectrophotometeric method to generate superoxide anion. Among them, the dichloromethane extracts of four salt marsh plants and the methanol extracts of fifteen ones were weak superoxide dismutase-like activities.

• 한국제4기학회지
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• 제24권1호
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• pp.35-45
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• 2010

부여 능산리 왕포천 유역 충적평야에서 지형면 분류, 퇴적상분석, 연대측정 등을 행하여 충적평야의 지형발달을 밝히고 식생환경과 농경활동에 대해 고찰하였다. 왕포천 충적평야는 홀로세 해면상승과 함께 대하천인 금강의 영향을 크게 받아 형성되었으며, 자연제방, 배후습지성 범람원, 곡저평야, 구릉지로 구성되어 있다. 왕포천이 금강에 합류하는 곳에 금강의 자연제방이 폭넓게 나타나고, 중, 하류부 충적평야는 금강의 배후습지가 된다. 또한 왕포천 연안이 배후지역보다 조립질 함량이 높고 토탄층이 얇았다. 왕포천 충적층의 가장 하부 모래층은 해면하강기에 청동기인의 영향을 받아 퇴적되었고, 초기철기시대의 해면상승기에 왕포천의 수위가 높아지면서 토탄층이 형성되었다.

• 한국수자원학회:학술대회논문집
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• 한국수자원학회 2009년도 학술발표회 초록집
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• pp.827-831
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• 2009

Recently, frequency occurring flood and drought has increased the necessity of an effective water resources control and management of river flows. Therefore, the simulation of the flow distribution in natural rivers is great importance to the solution of a wide variety of practical flow problems in water resources engineering. However The serious problem facing two-dimensional hydraulic model is the treatment of wet and dry areas. The objective of this study is to investigate the wet and dry parameters that have direct relevance to model performance in situations where inundation of initially dry areas occurs. Several numerical simulations were carried out, which examined the performance of the marsh porosity method for the purpose of sensitivity analysis. Experimental channel and a variety of channel were performed for model tests. The results were compared with those of the observation data and simulation data of existing model. The RMA-2 model displayed reasonable flow distribution compare to the observation data and simulation data of existing model in dry area for application of natural river flow. As a result of this study, effectively applied marsh porosity method provide a reliable results for flow distribution of wet and dry area, it could be further developed to basis for extending to water quality and sediment transport analysis.