• 한국생태학회:학술대회논문집
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• 한국생태학회 2002년도 VIII 세계생태학대회
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• pp.113-118
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• 2002

Vegetation and riverine structures were compared among urban and several semi-natural rivers by applying direct gradient analysis and ordination method. Urban rivers showed different species composition from the semi-natural ones. Species composition of semi-natural rivers depended on the geographical positions, such as the upstream, midstream, and downstream and on micro-topographies, such as the waterside, flooding bed, and embankment. Semi-natural rivers showed gentle change in micro-topography, whereas urban one did not so. Our restoration plan to improve the ecological quality of the degraded urban river by imitating semi-natural river was prepared based on those data.

• The Korean Journal of Ecology
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• 제25권4호
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• pp.247-252
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• 2002

Vegetation and riverine structures were compared among urban and several semi-natural rivers by applying direct gradient analysis and ordination method. Urban rivers showed different species composition from the semi-natural ones. Species composition of semi-natural rivers depended on the geographical positions, such as the upstream, midstream, and downstream and on micro-topographies, such as the waterside, flooding bed, and embankment. Semi-natural rivers showed gentle change in micro-topography, whereas urban one did not so. Our restoration plan to improve the ecological quality of the degraded urban river by imitating semi-natural river was prepared based on those data.

• Water Engineering Research
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• 제6권3호
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• pp.131-147
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• 2005

Today, a trend that tries to return the artificial space of a river to a natural one is expanding. But in Korea, which lies in the monsoon climate zone, rivers endure flood damage every year. Moreover, climatic change from global warming causes severe variations in precipitation patterns. Until recently, river restoration practices in Korea have followed partial restoration. These restorative treatments transformed artificial structures of the stream to natural ones and introduced natural vegetation by imitating natural or semi-natural streams. Treatment transformed the riparian structure and increased the diversity of micro-topography and vegetation. Furthermore, restoration recovered species composition, increased species diversity, and inhibited the establishment of exotic species. In particular, the Suip stream, which was left to its natural process for approximately 50 years, recovered its natural features almost completely through passive restoration. An urban stream, the Yangjae, and a rural stream, the Dongmoon, were restored partially by applying ecological principles. On the contrary, technological treatment applied to recover flood damage induced species composition far from the natural vegetation and decreased species diversity. Additionally, this treatment increased exotic species. The same results were found also in benthic invertebrate and fish fauna. The above-mentioned results reflect the importance of ecological considerations in river management.

• 한국주거학회논문집
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• 제11권3호
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• pp.43-51
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• 2000

This study aims to find the characteristics of the folk houses in the upper area of Seomjin river in the view point of generating housing floor plans by their human and natural elements of environment. Because they are formed differently as them and have the characteristics as the houses in the upper area of Seomjin river. Seomjin river flows from mid-west area of the Korean peninsula to the southern sea. This is about 212.3km long and the fourth in the south of the Korean peninsula. It is surrounded high mountains in the upper area and makes open field in the mid and lower area of river. The study is surveyed and analyzed to the folk houses of the middle and lower class people in the area of Seomjin river. Because they have been formed by their natural and human elements of environment gradually. They are 35 houses - 13 in Jinan-kun, 4 in Imsil-kun, 10 in Namwon city, 10 in Sunchang-kun. They are analyzed by their floor plans and their spatial relations. The result of this study is that they are made by their natural and human elements of environment. There are some houses with semi-several wings and with storage that are appeared in the mountain village. It reflects that they are surrounded by high mountains. And there are some houses with wooden floor room that are appeared in the area of river little in the area of mountain. To prevent wind from the river the houses are layouted as a form . open ㄴ type, open ㄷ type, and their wall is made of stone and planted bamboo trees around their houses.

• 한국광물학회지
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• 제26권3호
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• pp.189-196
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• 2013

제주 남서 이질대에서 채취된 138개의 해양표층퇴적물 시료와 황하와 양쯔강 하천퇴적물 시료에 대하여 반정량 X선회절분석법에 의한 점토광물 상대조성을 바탕으로 주성분분석을 이용하여 퇴적물의 기원지를 연구하였다. 제1주성분과 제2주성분이 전체 자료의 90% 이상을 설명하기 때문에 두 주성분만을 가지고 R프로그램을 이용하여 주성분분석을 실시하였다. 제주 남서 이질대 내 각각의 점토광물의 분포양상은 매우 복잡하지만, 전체적인 분포양상을 고려할 때, 스멕타이트와 카올리나이트는 서부지역에서 높은 함량을 보였고 일라이트와 녹니석은 동부지역에서 상대적으로 높은 값을 나타냈다. 제주 남서 이질대의 동부지역에서 보여주는 상대적으로 높은 일라이트와 녹니석 함량은 양쯔강 퇴적물과, 서부지역에서의 높은 스멕타이트와 카올리나이트 함량은 황하 퇴적물과 더 유사한 양상을 나타낸다. 이러한 통계 처리 결과를 바탕으로 제주 남서 이질대의 동부지역은 양쯔강에서 유래하였고 서부지역은 황하로부터 기원했음을 추정할 수 있다. 추후 퇴적물 기원지 연구에 주성분분석이 유용하게 활용될 것으로 기대한다.

• 한국수자원학회:학술대회논문집
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• 한국수자원학회 2020년도 학술발표회
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• pp.327-327
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• 2020

Increase in Earth's surface temperature, higher rainfall intensity rate, and rapid changes in land cover are just some of the most evident effects of climate change. Flooding, and river sedimentation are two inevitable natural processes in our environment, and both issues poses great risks in the dam industry when not addressed properly. River sedimentation is a significant issue that causes reservoir deposition, and thus causes the dam to gradually lose its ability to store water. In this study, the long-term effects of climate change on the sediment discharge in Yongdam Dam watershed is analyzed through the utilization of SWAT, a semi-distributed watershed model. Based from the results of this study, an abrupt increase on the annual sediment inflow trend in Yongdam Dam watershed was observed; which may suggests that due to the effects of climate change, higher rainfall intensity, land use and land cover changes, the sedimentation rate also increased. An efficient sedimentation management should consider the increasing trend in sedimentation rate due to the effects of climate change.

• 한국해안·해양공학회논문집
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• 제33권1호
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• pp.1-12
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• 2021

담수 유입이 항만 내 해수순환에 미치는 영향을 조사하기 위하여, 인천 남항의 남측에 위치한 신국제 여객터미널 해역에 3차원 유동 수치 모델을 구축 및 적용하였다. 수치 모델의 모의 기간은 경기만 지역의 평수기인 5월 15일부터 6월 30일까지 약 45일이며, 모델 결과와 관측자료의 비교를 통하여 유동과 염분 변화에 관한 모델의 재현성을 검증하였다. 신국제 여객터미널에 영향을 미치는 담수 공급원은 한강과 항만 동쪽에 위치한 용현 갯골 유수지가 있다. 유수지의 유무에 따른 잔차류 결과를 분석해 보면, 한강과 유수지가 모두 고려된 실험안이 한강만을 고려한 실험안보다 염분 경사에 의한 2층 흐름 구조(표층은 외해 방향, 저층은 항 내를 향한 흐름 구조)가 수평적으로 더 강하게 발달한다. 이는, 한강으로부터의 담수 영향보다 유수지로부터의 담수 영향이 신국제 여객터미널 해역에서 더 크다는 것을 시사한다. 또한, 잔차류의 2층 흐름 구조는 북쪽에 위치한 인천 남항보다, 남쪽에 위치한 신국제 여객터미널에서 더 강한 2층 흐름 구조가 발생한다. 이 프로세스는 유수지로부터의 담수와 항 내로 전파된 조류가 만나 신국제 여객터미널 방향으로 회전되어 전파되면서, 남쪽에 위치한 신국제 여객터미널에 저염수가 전달됨에 따라 형성된다. 이러한 흐름은 신국제 여객터미널 전면부에서 수평적인 염분 경사에 의한 성층을 강화시키며, 강화된 성층은 2층 흐름 구조를 형성 및 유지시킨다. 따라서, 항만 내의 경압 작용에 의한 해수순환과 물질이동을 재현하고자 할 때, 유수지와 같은 국지적인 담수 유입원이라도, 항만 내의 해수순환에 지배적인 영향을 미치므로, 현장 관측 자료를 기반으로 유수지에서 방류되는 실시간 담수 유량에 따른 수치모델을 수행해야 한다.

• Ecology and Resilient Infrastructure
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• 제6권4호
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• pp.258-266
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• 2019

이 연구는 자연에 기반을 둔 하천기술을 제방에 적용하여 그 효과를 평가하기 위해 수행되었다. 친환경 신소재 바이오폴리머를 제체 표면에 적용하여 내구성과 친환경성을 증진시킴과 동시에 월류에 대응하기 위한 제방의 보강 대책을 수립하고자 하였다. 안동하천연구센터에 현장토를 사용하여 높이 1 m, 마루 폭 3 m, 사면경사 1:2, 총 길이 5 m의 중규모 제방모형을 제작하였으며, 바이오폴리머와 흙을 적정 비율로 혼합한 바이오-소일 (bio-soil)을 제방 전면에 5 cm 두께로 도포하여 월류 발생에 대한 제방의 안정성 평가 실험을 수행하였다. 영상분석 프로그램을 이용한 픽셀기반 분석 기법을 적용하여 시간에 따른 제방사면의 붕괴면적을 산정하였으며 그 결과, 신소재 적용 제방의 경우 완전붕괴가 발생하는 시간은 일반 흙 제방에 비해 12배 이상 증가해서 붕괴지연효과가 상당히 높은 것으로 나타났다.

• 한국조경학회지
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• 제32권3호
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• pp.1-17
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• 2004

The focus of this study is the promotion of green area volumes and their naturalness, water circulation system, decline of entropy, creation of biological habitats and linkage of separated urban green space. Re-presentative urban biotope survey sites were categorized as urban biotope, semi-natural biotope, and natural forest. In the urban biotope, a residential biotope was constructed near the Han river and in mountain areas. The green-area ratio at the housing complex was about 25%. GVZ(Grunvolumenzahl) was 0.35m$^3$/m$^2$ at the 5∼10-story housing complex, and 1.53m$^3$/m$^2$ over the 11-story. As for the green-area structure of the housing complex, canopy layer, understory layer, and shrub layer were not differentiated and the green-area volume was not high enough. The green-area ratio of school areas as a public area biotope was 5∼20%. GVZ was 1.12m$^3$/m$^2$ at Myungduk High School, and 1.78m$^3$/m$^2$ at Jeonggok Elementary School. In order to convert the urban biotope into an ecological area, green areas around the buildings should be connected to urban buffer green areas, and multi-layer structures should be established with natural plant species. In the semi-natural biotope, neighbor parks were created park in the vicinity of the natural forests. GVZ was 0.28m$^3$/m$^2$, and plantation was established with single layer structure and was definitely insufficient for the area. The urban buffer green areas have been established in strip corridors with the width of 20∼123m. In those areas, GVZ was 0.16∼0.27m$^3$/m$^2$ and had a deficient canopy layer, understory layer, and shrub layer. Soil conditions were not favorable for tree growth. In the natural biotope, GVZ of the plantation was 1.03∼1.5m$^3$/m$^2$ but the high crown closure of this area reduces the chance of species change and succession. GVZ of natural forest was 2.53∼2.57m$^3$/m$^2$. It is desirable to plant diverse plants and the natural forest should be succeeded by broad-leaf deciduous tree species. To improve the value of biotope at Kangseo-Gu, building height needs to be limited to reduce the environmental deterioration in the city. In order to maintain the water circulation system, water-permeable material is recommened when the urban surface areas are paved. The establishment of a water circulation system will improve ground water levels, soil moisture, water quality, and habitats. In order to improve biological diversity, it is desirable to have multi-layer structures in urban green areas with native species.

• 한국수자원학회논문집
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• 제37권7호
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• pp.589-598
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• 2004

장기적 유출 측면에서 유역의 도시화는 불투수면적의 확대로 인한 토지이용변화, 인위적 구조물의 설치여부, 하천 환경의 변화를 유발하며 따라서 도시화되기 이전과 매우 다른 형태의 유출거동 특성을 가진다. 따라서 자연적인 유출 성분변화 특성은 물론 도시화 유역 특성변화요소를 적절히 반영함으로써 지표수, 하천수, 지하수 등의 수문순환 요소를 장기적인 측면에서 정량적으로 평가할 수 있는 유출모의모형이 필요하다. 본 연구에서는 준 분포형 장기 유출모형인 SWAT모형과 도시지역의 유출해석에 주로 이용되는 SWMM 모형의 RUNOFF 블록을 결합함으로써 자연유역은 물론 도시유역의 제반 유역특성을 충분히 고려할 수 있는 장기유출모형인 SWAT-SWMM 모형을 개발하였다. SWAT-SWMM 결합모형의 구정방법 및 모형의 한계 그리고 결합모형의 모식을 중심으로 두 모형의 결합상황을 기술하였다.