• 한국지형학회지
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• 제17권3호
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• pp.17-30
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• 2010

대구를 대표하는 하천인 신천과 금호강에 발달하는 문화지형을 발굴하여 이야기 꺼리를 구성하였고 그것의 활용방안에 대해 다음과 같이 요약하였다. 1) 신천에서 볼 수 있는 대표적인 문화지형으로는 용두바위(하식애), 하식애, 바위그늘(암음), 판상절리지형, 하식동, 토르 등이다. 2) 금호강변에 발달하는 대표적인 문화지형으로는 습지, 나루터, 포인트바, 하식애, 화담(소), 동화천, 무태, 침산, 연암산, 상화대(하식애) 등이다. 3) 신천변과 금호강변에 발달하는 문화지형의 보존을 위해서는 방치되어 있는 문화지형의 발굴과 복원이 절실하며, 가치 있는 문화지형은 문화재로 지정하여 멸실이나 훼손으로부터 보호할 필요가 있다. 4) 활용방안의 경우 신천에서는 문화, 역사, 생태환경 체험을 위한 자연관찰학습장 조성이 필요하다. 금호강의 경우 '대구 금호강 문화지형 탐방로'를 조성하여 탐방객 스스로 찾아갈 수 있도록 하는 '자기주도형 탐방(self-guided tour)' 방식을 도입하는 것이 효과적이다.

• Environmental Analysis Health and Toxicology
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• 제16권4호
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• pp.161-170
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• 2001

In aqueous ecosystems, the level of toxicity is highly responsive dependant to multiple variables, including rainfall, sunlight, pH, adhesion, etc. Because Korea has particularly distinct wet and dry seasons, the toxicity of pollutants in rivers or streams is dependant on the sampling season and time. In order to examine the effects of rainfall on toxicity, sediment samples were collected from five sites along the Keumho river. It was found that Microtox toxicity levels were generally higher during the dry season than the wet season. It indicated that river pollutants are carried off more quickly by the water during the wet season. As a result, it was recommended that the point sources of pollutants of the Keumho river would be placed between KH3 (Paldalgyo) and KH4(Keumhogyo), KH4(Keumhogyo) and KH5(Dasa).

• 환경영향평가
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• 제18권5호
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• pp.271-280
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• 2009

The objective of this study is to develop a reliable flow forecasting model based on neural network algorithm in order to provide flow rate at stream sections without flow measurement in Nakdong river. Stream flow rate measured at 8-days interval by Nakdong river environment research center, daily upper dam discharge and precipitation data connecting upstream stage gauge were used in this development. Back propagation neural network and multi-layer with hidden layer that exists between input and output layer are used in model learning and constructing, respectively. Model calibration and verification is conducted based on observed data from 3 station in Nakdong river.

• 한국해양공학회:학술대회논문집
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• 한국해양공학회 2004년도 학술대회지
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• pp.133-136
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• 2004

In-situ collection experiments were performed to analyze inflowing sedilnents behavior as a basic study of topographical change in Nakdong River Estuary. Sediment rate and bed load flux ranged from 0.0004 to $0.472\;g/cm^2/day\;and\;0.0005\~1.7579\;g/cm^2/day$, respectively. The settling velocity of suspended particulate matter was estimated in tire range of $0.339\~1.010\;cm/sec$, The grain size analysis shows that surface sediments in backside of sandbar and bed load in front of dike have a similar grain size distribution. It is considered that the source of surface sediments in backside of sandbar were flowed in from Nakdong River. In order to verify the characteristics of inflowing sediments behavior, detailed surveys around Nakdong River Estuary need to be carried out, continuously.

• Spatial Information Research
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• 제22권2호
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• pp.45-52
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• 2014

최근 몇 년 동안 하천오염 관리의 중요성이 증가하고 중앙 및 지방정부는 하천오염 문제를 해결하기 위해 지속적인 노력을 하고 있다. 본 논문에서는 공간데이터와 오염원 정보의 응용 프로그램에 대해 살펴보고자 한다(항공사진, 지적정보, 오염원, GPS 데이터 등). 본 논문의 목적은 하천오염 관리시스템의 개발을 위해 공간정보의 응용 프로그램을 제공하는 것으로 보다 자세한 프레임웍을 보여 주기 위해 GPS 및 GIS를 적용하여 하천 오염원의 정량적 분석과 관리계획을 수행 하였다. 그런 이유에서 공간분석을 통한 하천오염 관리시스템을 구축 하였다. 본 연구가 도심하천 오염원 보전에 관한 관리정책 수립에 기여할 것을 기대한다.

• 산업기술연구
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• 제27권B호
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• pp.229-233
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• 2007

This research investigated the way of generating the flowing of water in case of artificial fluctuation of river width by the unidimensional numerical analysis in order to reconstruct vertical and expanse features of flowing, and the problem of existing numerical analysis in accordance with local enlargement and reduction of river through hydraulic model experiments with results of numerical analysis. The result revealed that when the local section change in the same river is exist, it showed 0.93m in the case of no change of local section in the hydraulic model experiments and numerical analysis, however, it presented 1.645m on the occasion of local section changes in the hydraulic model experiments and numerical analysis. In other words, there was a significant difference in the existing numerical analysis, when there was a local section change. As a result of the experimental section for the enlargement and reduction of local river width, due to the sensitive change for fluctuation of flood discharge, there was a significant difference between numerical analysis and hydraulic model experiments. In addition, the result of comparison between the enlargement and reduction of local river width confirmed that the result of numerical analysis with hydraulic model experiments showed larger generation of deviation in case of enlargement of section than in case of reduction of section.

• 생태와환경
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• 제43권4호
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• pp.503-512
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• 2010

This study was conducted to evaluate fish fauna, species composition, and various guilds against stream orders along with analysis of fish community structure and diversity in Geum River watershed from 2005 to 2007. The total number of fish collected was 4,216 representing 12 families with 56 species. Zacco platypus was the most abundant fish species with 26% in relative abundance (RA). Korean endemic species were 24 species including Zacco koreanus, Microphysogobio yaluensis, Gobiobotia nakdongensis, and Iksookimia koreensis, etc. We also collected endangered fish species such as G. nakdongensis, Liobagrus obesus, and Pseudopungtungia nigra, etc., and their new distribution sites were found in the survey, providing some sites of the fish conservation and protection. Fish tolerance and trophic guilds analysis showed that the proportion of sensitive species, intermediate species, and tolerant species were 33.4%, 29.3%, and 37.3%, respectively and omnivores and insectivores were 48.1 % and 38.4%, respectively. Analysis of site-base study indicated that tolerant species and omnivore species were high in some polluted tributary streams (i.e., Gap and Miho stream) and sensitive and insectivore species were low. In the functional relations, expressed as simple linear regression equations, of stream order on fish metric attributes, showed that the number of species and the number of individuals increased as the stream order increases. This phenomenon was explained by greater availability of stable water volume, rich food, and higher physical habitat capacity. Such guild compositions and stream order characteristics of the river influenced the community structures, based on species diversity, dominance and evenness index in the study. This study may be used as important data in the future for comparisons of fish fauna and compositions before and after two weir (dam) constructions in the middle of Geum River by the government.

• 한국조경학회지
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• 제35권1호
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• pp.28-35
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• 2007

The purpose of this study is to evaluate the visual preference factors for river scenery, which can vary according to changes in water levels, to estimate the optimal ratio of water surface/river width. Five locations on the Youngsan and Sumjin Rivers were selected as representative samples and field survey data such as channel geometry with water levels were prepared to develop the slide of river scenery, To estimate the level of satisfaction in river scenery, slides of 4 different water levels at each of the representative locations were developed through questionnaire. To analyse the correlation between the visual preference for river scenery and preference factors, a multi regression analysis method was adopted in this study. According to the results of the multi regression analysis, Factor B(Aesthetic factors) have the greatest affect on visual preferences and Factor A(A Feeling of Open space and Physical factors) affect significantly to visual preferences for river scenery. The results of analysis shows that the most preferred W/B ratio varies from 0.5 to 0.7 and this result indicates that many people prefer high levels river flow to maintain a natural and harmonious view of rivers. The results of this study will contribute to the field of river landscape design and river restoration projects in order to maximize the human being's satisfaction as a part of nature.

• 한국콘텐츠학회:학술대회논문집
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• 한국콘텐츠학회 2009년도 춘계 종합학술대회 논문집
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• pp.437-441
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• 2009

현대사회는 하천에서부터 시작되었다고 할 정도로 우리 삶의 중심에 있는 자연의 중요한 일부라고 할 수 있다. 하천은 단순한 치수와 이수뿐만 아니라 다양한 자연 그대로의 환경적 잠재 기능을 복원하는 방향으로 전환되고 있다. 이러한 하천 복원의 필수적 요소는 식생이나 이것은 하천의 흐름저항을 크게 하여 홍수시 수위를 증가시키는 요인이 된다. 따라서 식생에 따른 조도계수의 변화와 흐름저항으로 인한 수리학적 특성을 이해하는 것은 하천복원에서 중요한 요소가 된다. 본 연구에서는 하천식생 복원모형에서의 홍수위 분석과 하상변동을 예측하고자 한다. 이를 위해 공주대교 상 하류 구간에 HEC-RAS와 RMA-2 모형을 적용하여 홍수위 분석을 실시함과 동시에 SED-2D 모형을 적용하여 하상변동을 예측하였다.

• 한국재난관리표준학회지
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• 제3권1호
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• pp.51-60
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• 2010

본 연구는 선행연구들의 하천 유역 오염물질 및 오염도 분석결과를 바탕으로 하천 오염도와 지반 오염물질 간의 상호관계에 대해 분석하였다. 크게 도시 및 산업지구 인접 하천인 낙동강, 태화강, 안양천과 농 축산지 인접 하천인 영산강, 미호천으로 구분해 연구하였으며, 대상 오염원은 중금속 오염물질로 한정하였다. 도시 및 산업지구 인접 하천의 경우 중금속 오염물질 함유량이 일치하여 상관성을 보였으나 농 축산지 인접 하천의 경우 불일치하여 상관성을 밝히기 어려웠다. 도시 및 산업지구 인접 하천의 경우 점오염원의 영향을 많이 받기 때문에 지반오염에도 직접적인 영향을 미친 것을 알 수 있었고 농 축산지 인접 하천의 경우 점오염원보다 비점오염원의 영향을 많아 하천오염도와 지반오염의 상관성이 적은 것으로 나타났다.