• 한국마린엔지니어링학회:학술대회논문집
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• 한국마린엔지니어링학회 2005년도 후기학술대회논문집
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• pp.220-221
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• 2005

Sub-bottom profiler(SBP) has been used extensively for the mapping of basement in the foundation design of offshore structure, for pre- and post-dredging operations within harbors and channels, for selection of pipeline routes, sitting of drilling platforms, and in the exploration for an aggregates such as sands and gravels. During the construction of Siwha embankment for irrigation water and the expansion of arable land, the breaking of an embankment unfortunately occurred so that a lot of riprap was swept away and widely dispersed by the tide and strong current. The feasibility study for the construction of the tidal-powered electric plant in Siwha embankment was performed quite recently. Therefore we made use of SBP survey to investigate the distribution of the lost riprap. We could successfully map out the distribution of the lost riprap from the reflection amplitude characteristics of the sediments in SBP data set. We demonstrated the variation of reflection amplitude versus the sediments with and/or without riprap by means of the numerical modeling of acoustic wave equation using finite difference method. Also we examined an amplitude anomaly of the ripraped area through the physical modeling using ultrasonic.

• 기술사
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• 제35권4호
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• pp.48-51
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• 2002

Due to locally torrential downpours which shows Increasing trend, high tide of the southern sea of Korea and etc. submerged and Inundated districts at the lowlands of Nakdong River Basins has been Increasing year by year In order to protect flood hit, it is necessary to make an early implementation of flood control dam and other flood protection works according to Nakdong River Comprehensive Development Project. In addition to the large scale comprehensive projects, local key measures, such as lowland development control, embankment reinforcement, leakage protection, maintenance and management of facilities, increase in pumping station, will be highly effective.

• 한국균학회지
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• 제48권4호
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• pp.457-473
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• 2020

본 연구에서는 국내 기수 환경의 물과 토양에서 균류의 다양성을 확인하기 위해 을숙도, 금강하구둑, 순천만습지, 대호방조제, 신두리사구 및 부남방조제 총 6지점의 현장조사 및 시료를 채집하였다. 현장에서 여과한 담수시료와 담수퇴적물로부터 곰팡이를 순수분리하여 PDA배지에 접종한 후 25℃에서 배양하였다. 기수역 시료에서 순수분리된 균주는 총 173균주로 ITS 부분을 분석하여 속 수준으로 동정하였다. 분리 동정된 균주를 다양성 지수를 이용하여 분석하였다. 분리된 균류는 Pleosporales, Eurotiales, Capnodiales, Hypocreales, Polyporales, Saccharomycetales, Agaricales, Glomerellales, Mucorales, Dothideales, Russulales, Xylariales, Sordariales, Myrmecridiales, Tubeufiales, Onygenales, Cantharellales, Amphisphaeriales 목에 속하며 Cladosporium속이 20%로 가장 우점하며, 그 다음은 Penicillium (19%), Fusarium (5%)의 순서로 많이 분포하였다. Sarocladium kiliense NNIBRFG3280와 Fusicolla merismoides NNIBRFG23708를 국내 기수환경에서 발굴하였으며, 이를 국내 미기록종으로 보고하고자 한다.

• 한국어류학회지
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• 제17권2호
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• pp.142-147
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• 2005

새만금 방조제 축조에 따른 조간대 어류 군집의 변화를 알아보기 위해 조수웅덩이가 잘 발달된 전북 군산시 내초도와 전북 부안군 해창의 조수웅덩이를 대상으로 2002년부터 2004년까지 매월 어류를 채집하였다. 조사 기간 동안 채집된 어류를 기존의 자료와 비교 검토한 결과, 부안군 해창의 조수웅덩이에서 종의 수는 다소 감소하였으나, 두줄망둑 Tridentiger trigonocephalus가 우점종으로 나타난 점은 종전에 비해 변화가 없었다. 그러나 전북 군산시 내초도의 조간대에서는 종 수의 감소 외에도 우점종이 두줄망둑 T. trigonocephalus에서 풀망둑 Synechogobius hasta로 바뀌었고, 특히 모래 바닥을 서식처로 하는 날개망둑 Favonigobius gymnauchen의 감소현상이 뚜렷하였다. 한편 부안군 해창의 조간대에는 감성돔의 유어들이 본 조사 기간에도 다량 출현하고 있었지만, 내초도 조간대의 경우 1994년과 2000년에 조수웅덩이에서 다량으로 채집되었던 감성돔 Acanthopagrus schlegeli와 농어 Lateolabrax japonicus의 유어들이 채집되지 않았다. 결과적으로 내초도 조간대는 이들 어류의 성육장으로서의 기능이 갈수록 소실되어 가고 있는 것으로 판단되며, 이러한 전반적인 결과는 부안 해창에 비해 군산 내초도의 조간대가 펄에 의한 퇴적이 더욱 심하여 조간대 어류의 서식 환경이 크게 변하고 있기 때문으로 생각된다.

• 한국신재생에너지학회:학술대회논문집
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• 한국신재생에너지학회 2007년도 춘계학술대회
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• pp.613-616
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• 2007

The main structures that comprise a tidal power plant are turbine structure, sluice structure, tide embankment and gate. Since these structures are founded on seabed ground, an extensive geotechnical site investigation to evaluate the engineering properties of field soils must be conducted prior to design and construction. According to the results of geotechnical site investigation conducted at the planned site for construction of Incheon bay tidal power plant, soft ground generally lie 7 meters below the seabed surface level. This research suggests the reliable and economical design of foundations and ground improvements required for construction of main structures in Incheon bay tidal power plant, with considerations on field conditions.

• 한국측량학회지
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• 제20권2호
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• pp.207-214
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• 2002

서해 연안의 개발은 갯벌의 감소로 해양생태계를 위협하고 있으며 산업화에 따른 대형 매립공사는 주변의 기상변화와 해상변화를 일으켜 해저지형 및 해안선에 많은 변화를 발생시키고 있다. 또한 선박의 안전한 입, 출항을 위한 항로에 영향을 주고 있다. 따라서 본 연구는 해도에 나타난 기준선인 최저저조면의 해양 기준면에 근거한 해안선(0 m선), 수심 2 m선. 그리고 지형도에 근거한 해안선(육지부분)으로 나누어 수치화하였으며 수치화 된 도면을 4개의 구역으로 구분하여 분석함으로써 인천국제공항 건설, 신도시 개발, 방조제 공사 등의 서해 연안 개발에 따른 해안과 해저의 변화 정도를 알아보았다.

• 한국지반공학회:학술대회논문집
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• 한국지반공학회 2008년도 추계 학술발표회
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• pp.1727-1734
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• 2008

After the final closure of sea dyke, seepage behaviour of embankment is highly changed by variation of water head different between tide wave and controlled water level at fresh lake. Especially, the seepage behaviour of bottom protection layer of final closure section is more important factor for structural and functional stability of sea dyke, because of the bottom protection layer of final closure section is penetrated sea side to fresh lake. Even though bottom protection layer was filled with dredged fine sand, it has a high permeability. In this paper, mainly described about the seepage velocity and borehole image of bottom protection layer filled with dredged sand after final closure. Various in-situ tests such as BIPS (Borehole Image Processing System) and ABI (Acoustic Borehole Imager) survey, wave velocity measuring, and color tracer survey were conducted to evaluate the seepage behavior of bottom protection layer. Based on the in-situ tests, the bottom protection layer of final closure section was almost filled with dredged sand which is slightly coarse grain sand and there have sea water flow by water head different between tide wave and controlled water level at fresh lake. Also, comply with tracer survey results, the sea water flow path was not exist or generated in the bottom protection layer. However, because of this result not only short term survey but also just one test borehole survey results, additional long term and other borehole tests are needed.

• 대한원격탐사학회지
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• 제31권1호
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• pp.29-38
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• 2015

The coastline influenced naturally and artificially changes dynamically. While the long-term change is influenced by the rise in the surface of the sea and the changes in water level of the rivers, the short-term change is influenced by the tide, earthquake and storm. Also, man-made thoughtless development such as construction of embankment and reclaimed land not considering erosion and deformation of coast has been causes for breaking functions of coast and damages on natural environment. In order to manage coastal environment and resources effectively, In this study is intended to analyze and predict erosion in coastal environment and changes in sedimentation quantitatively by detecting changes in coastal line from data collection for satellite images and aerial LiDAR data. The coastal line in 2007 and 2012 was extracted by manufacturing Digital Surface Model (DSM) with Aviation LiDAR materials. For the coastal line in 2009 and 2010, Normalized Difference Vegetation Index (NDVI) method was used to extract the KOMPSAT-2 image selected after considering tide level and wave height. The change rate of the coastal line is varied in line with the forms of the observation target but most of topography shows a tendency of being eroded as time goes by. Compared to the relatively monotonous beach of Taean, the gravel and rock has very complex form. Therefore, there are more errors in extraction of coastlines and the combination of transect and shoreline, which affect overall changes. Thus, we think the correction of the anomalies caused by these properties is required in the future research.

• 한국측량학회:학술대회논문집
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• 한국측량학회 2002년도 창립 20주년기념 국제학술대회
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• pp.219-228
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• 2002

서해 연안의 개발은 갯벌의 감소로 해양생태계를 위협하고 있으며 산업화에 따른 대형 매립공사는 주변의 기상변화와 해상변화를 일으켜 해저지형 및 해안선에 많은 변화를 발생시키고 있다. 또한 선박의 안전한 입, 출항을 위한 항로에 영향을 주고 있다. 따라서 본 연구는 해도에 나타난 기준선인 최저저조면의 해양 기준면을 기초 자료로 사용하여 육지부분의 해안선과 갯벌의 경계로 나타나는 0m경계선, 수심2m선을 수치화 하였으며, 수치화 된 도면을 4개의 구역으로 구분하여 분석함으로써 신공항건설과 신도시개발, 방조제공사 등의 서해 연안 개발에 따른 해안과 해저의 변화 정도를 알아보았다.

• 한국유체기계학회 논문집
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• 제12권3호
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• pp.38-43
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• 2009

The Shiwhaho is an artificial lake located in Yellow sea of Korea where the ocean tidal current is significantly strong, and the tidal power plant is currently being under construction to generate electric power from the ocean tidal current. In addition to the tidal power plant under construction, an ocean current power park was proposed to maximize the power generation by utilizing the ocean current generated by the tidal power plant. To evaluate the feasibility of such combined power plant, the flow characteristics in the ocean current power parks connected with the tidal power plants were investigated numerically in the present study. When two different type of generations are operating together as a system, their interference may occur, which affects their efficiency. Therefore, the minimum distances between the tidal power plants and the ocean current power generators are studied in the present study to minimize such interference. The feasible region to generate power around the Shiwha tide embankment is also predicted by considering predicted ocean current speed distribution. Various arrangements of the ocean current generators are examined and an optimal arrangement is also discussed.