• 한국환경복원기술학회지
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• 제18권6호
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• pp.85-95
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• 2015

Recent years, nationwide projects for ecological restoration are implemented with emerging issues on the stream ecosystem. In order to enhance effectiveness of the ecosystem restoration and reduce negative impact, the appraisal of effectiveness through the follow-up monitoring and the adaptive management process are executed in consecutive phase. In this study, planning phase, monitoring and adaptive management in Hakui stream which is part of An Yang stream restoration project is introduced as representative ongoing case of effective adaptive management. The aim of this study is to verify the adaptive management process and suggest direction of effective restoration. Restoration project of Hakui stream resulted in increasing number and diversity of species (vegetation, fish, bird, invertbrates, amphibian and reptilia) according to monitoring from 2004 to 2013, and enhancing natural river landscape by evaluation of river naturalness among 2001(before restoration), 2007 (after), 2015 (recent). However, excessive vegetation expansion or sediment deposition on channel over time caused unexpected results such as terrestrialization or degradation of habitats. Adaptive management action such as removing disturbance species (Humulus japonicus)(2007), coppicing willow (2007), release of march snail (2007), creation of wetland (2014) were implemented based on monitoring results. And then appraisal of management action was discussed.

• 대한지리학회지
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• 제40권4호
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• pp.441-453
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• 2005

본 연구의 목적은 지형자료에 대한 계층화 알고리즘을 개발하여 하계망을 일반화하고자 하였다. 하계망은 계층적인 구조를 갖기 때문에 일반화를 위해 선형사상들에 대한 지형자료의 계층화가 요구된다. 하계망 일반화의 절차는 하계망의 계층화, 차수별 선택과 제거, 그리고 알고리즘 적용으로 진행하였다. 계층화는 하계망의 고도에 따른 방향 결정, Stroke Segment 서열화. Strahler 차수화로 진행하였으며, 선형사상의 선택과 제거는 지리자료의 질의를 통해 차수와 선의 길이를 기준으로 처리하였다 개선된 Simoo 알고리즘은 선형사상의 곡률을 낮추고 완만화에 효과적이었다 연구결과는 공간적으로 다양한 계층구조를 갖는 사상들에 대한 일반화를 개선할 수 있을 것으로 기대된다.

• 한국수자원학회:학술대회논문집
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• 한국수자원학회 2004년도 학술발표회
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• pp.516-520
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• 2004

하천자연도란 하천 생태계의 자연스러운 정도를 의미한다. 하천자연도평가는 인위적 환경훼손의 영향을 상대적으로 평가하여, 현재 하천이 자연스러움에서 어떻게 어느 정도 벗어나 있는지를 가늠하며, 그리고 그러한 차이가 하천생태계에 어떤 중요성이 있으며, 자연에 가까운 하천구조를 다시 만들기 위해서는 얼마나 큰 행동이 필요한지를 보여주기 위해서 시행하는 것이다. 금번 연구에서는 국내외 하천자연도평가에 관한 연구성과를 검토하여 문제점을 개선하고 홍천강에 적용성을 검토하여 우리나라의 하천특성에 맞는 하천자연도 평가 방법을 제안하였다. 금번 제안한 하천자연도 평가는 하천의 치수 및 이수기능을 증진하고 하천생태계의 서식처 기능을 확보하기 위해, 하천의 환경적인 측면에서의 건전성을 평가하여 하천환경정비의 방향성을 제시할 수 있는 지표로 활용될 것으로 기대된다.

• Proceedings of the National Institute of Ecology of the Republic of Korea
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• 제2권4호
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• pp.259-273
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• 2021

We conducted a study to investigate the characteristics of the carbon cycle of two streams (located in Shig a Prefecture, Japan), having similar size, namely, the Adokawa stream (length: 52 km, area: 305 km², watershed population: 8,000) and the Yasukawa stream (length: 62 km, area: 380 km², watershed population: 120,000), but with different degree of human activity. Samples were collected from these two streams at 14 (Adokawa stream) and 23 (Yasukawa stream) stations in the flowing direction. The dissolved inorganic carbon (DIC) concentration and the stable carbon isotope ratio of DIC (δ¹³C-DIC) were measured in addition to the watershed features and the chemical variables of the stream water. The δ¹³C-DIC (-9.50 ± 2.54‰), DIC concentration (249 ± 76 µM), and electric conductivity (52 ± 13 µS/cm) in Adokawa stream showed small variations from upstream to downstream. However, the δ¹³C-DIC (-8.68 ± 2.3‰) upstream of Yasukawa stream was similar to that of Adokawa stream and decreased downstream (-12.13 ± 0.43‰). DIC concentration (upstream: 272 ± 89 µM, downstream: 690 ± 37 µM) and electric conductivity (upstream: 69 ± 17 µS/cm, downstream: 193 ± 37 µS/cm) were higher downstream than upstream of Yasukawa stream. The DIC concentration of Yasukawa stream was significantly correlated with watershed environmental variables, such as, watershed population density (r = 0.8581, p<0.0001, n = 23), and forest area percentage of the watershed (r = -0.9188, p<0.0001, n = 23). δ¹³C-DIC showed significant negative correlation with the DIC concentration (r = -0.7734, p<0.0001, n = 23), electric conductivity (r = -0.5396, p = 0.0079, n = 23), and watershed population density (r = -0.6836, p = 0.0003, n = 23). Our approach using a stable carbon isotope ratio suggests that DIC concentration and δ¹³C-DIC could be used as indicators for monitoring the health of stream ecosystems with different watershed characteristics.

• 인문언어
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• 제6권
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• pp.295-320
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• 2004

$\ulcorner$Xixiangji[West chamber]$\lrcorner$ is one of the most popular Chinese dramas which was first translated into Korean by Chung-hee Kim in 1811. $\ulcorner$Dongsanggi[East chamber]$\lrcorner$is a Korean drama which was written in Chinese by Ok Lee in 1791. It adopted the form of Chinese traditional drama, $\ulcorner$xixianji$\lrcorner$. 1 think theses are very interesting examples which show how we accepted Chinese dramas through translation or modification and created our own dramas in the past. 1 quoted their names in the title because it is thought that they can represent the direction of the stream of cultural exchange between two countries in the past. The direction has recently changed. Han stream[Korean cultural effect] has become very powerful in whole Asia in last 10 years. Cultural exchange between Korea and China has been very steady and popular over 2000 years before the 20th century We used to have cultural identity by using Chinese character and accept many of the cultural aspects from China. Now, we are trying to reestablish the relationship which has been cut off for about 50years. In this paper I tried to retrospect the results of cultural exchange in the past and argue about the problems we are now facing by examining interchange or acceptance of the Chinese drama including translations and theatrical performances. 1 also tried to suggest the diverse ways of mutual exchange to uplift the cultural level of two countries.

• 동굴
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• 제69호
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• pp.9-20
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• 2005

Geologic Structures are reflected on the landform development. So lots of studies are emphasized on the individual processes and mechanism of the relationship between geologic structures and landforms. In this study, many cases are represented, such as : weathering, stream directions and structures expecially joints, gnamas, meander bending etc. New D-D Diagrams and photos are available to explain the relations of two factors. Landform developments are depend on geologic structures.

• 한국환경과학회지
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• 제12권6호
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• pp.615-626
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• 2003

The applied model for this study area is WINFLOW using mite element method, It is thought that the simulation result by WINFLOW model under the steady flow state reflects well the ground water distribution within the reliability level which shows the error range of 1.1% to 8.0% from the comparison between the computed values and the observed, and analyzed that the constant head distribution is shown along the east-west direction and gentle and stable head gradient along the north-south direction. Ground water of the study area shows stable movement from the south to the stream area, and the particle trace for each location shows relatively linear shape from the upstream to the pumping location while the radius of influence according to the pumping amount shows a significant difference at the down stream area from the pumping location. The simultaneous pumping from P and P1 shows more complicated appearance, not the increase of the radius of influence than pumping from a single well P or P1, and it is analyzed that the particle path takes nearly linear form. It is known that the flow direction of the ground water and the velocity of the flow affect on the magnitude of the radius of influence of the wells from the fact that the more decreasing pattern of the ground water head is observed at the side of the well and the down stream area than the upstream area when the ground water moves from south to north regarding the radius of influence according to the pumping amount. Satisfactory results in analyses of ground water movement are obtained through the significant reduction of the physical uncertainties in the flow system as well as the relatively convenient model application using WINFLOW model which is proposed in this study.

• 한국주거학회논문집
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• 제25권6호
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• pp.133-146
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• 2014

This study aims to analyze the changes of adjacent residential area after the restoration of covered urban streams in seoul. The changes of adjacent residential area after restoration were analyzed by changes of land using, urban structure, individual lot of land and architecture to investigate relationship of the urban stream and residential change. The result as follows: the first one is the change of land use and urban structure in adjacent residential area. This change of infrastructure through stream restoration has transformed land use and urban structure in adjacent residential area. Secondly, there is the changes of the individual lot of land. It seemed that new development by combined lots would be concentrated in stream-side blocks. But, the changes of lots such as combining or dividing lots tend to be concentrated in stream-side, main road and main streets. In stream-side, commercial function of land use has changed to residential one which has restored streams landscape by transformation of lots use without changes of ownership-lots. Finally, there is the change of architecture. It turned out new building in adjacent residential area is similar to general development. However, new building in streamside is related to direction of stream. In addition, remodeling and expansion tend to change in commercial buildings on stream-side bridges of corner lots intensively. As a result, it is related to expectation of architectural activation and improvement of sidewalk environment by stream restoration.

• 한국수자원학회논문집
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• 제35권6호
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• pp.685-692
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• 2002

하천의 자연적 특성과 인간의 이용정도에 따라 하천들간의 서열이나 등급을 정하면, 하천의 여러 가지 특성들을 파악하기 쉽고 하천관리에 객관성을 부여할 수 있게 되어 매우 유용하다. 본 연구에서는 현재 확보 가능한 각종 통계 자료와 전문가 조사를 이용하여 하천의 자연적 특성, 하천의 이용정도, 그리고 하천이 관류하는 지역의 사회적 여건을 고려한 "하천별 중요로“ 라는 계량화된 평가지표를 제시하였다. 하천별 중요도는 계층분석법을 이용하여 하천에 영향을 미치는 여러 가지 인자들을 단계적 절차를 거쳐 선정하고, 전문가 조사를 통해 항목별 가중치를 결정한 후 표준화된 인자값에 각 인자별 가중치를 곱한 후 합산하여 산정하였다. 하천별 중요도는 하천들간의 상대적 중요도 파악, 하천의 향후 관리방향 판단, 현재의 하천등급 조정을 통한 하천관리의 효율성 제고, 중요도를 고려한 하천관리방식의 결정 등에 이용될 수 있다.수 있다.

• Spatial Information Research
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• 제10권1호
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• pp.107-122
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• 2002

유역 및 하천의 지형학적 특성은 유역을 모델링하고 관리하는데 매우 중요한 인자로 사용되고 있다. 본 연구에서는 최근 GIS 분야에서 구축된 수자원 관련 자료인 수자원 단위지도, 수치지도 등을 이용하여 밀양강 유역의 DEM과 하천망을 생성하고, 누가표고곡선, 하천 지형법칙, 유역특성인자 등을 이용하며 지형학적 특성을 파악하였다. DEM과 하천망은 수치지도의 지형 관련 레이어와 하천 관련 레이어를 추출하여 생성되었으며, 하천망은 위상 구조 뿐 아니라 방향성과 하천차수도 부여 되었다. 밀양강 유역의 지형학적 특성을 파악한 결과, 밀양강은 지질학적으로 장년기에서 노년기로 변화하고 있는 지역이며, 하천 구조는 Horton-Strahler의 하천지형법칙을 따르고 있음을 알 수 있었다. 본 연구는 수자원 관련 자료가 다양하게 구축되고 있는 현 시점에서, 벡터 자료를 이용한 수자원 관련 분석의 가능성을 제시한 것으로 사료된다.