• Parasites, Hosts and Diseases
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• 제23권1호
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• pp.123-139
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• 1985

이 보고는 우리나라 동남부지방(강원도, 경상남.북도, 전라남.북도, 제주도)에 위치하고 있는 70개 하천에서 1983년과 84년 6월 하순부터 10월 초순 중에 채집한 은어(Plecoglossus altivelis)의 요꼬가와흡충(Metagonimus yokogawai) 피낭유충의 감염상태를 조사한 결과이다. 1. 조사지역 70개 하천에서 채집한 은어의 총수는 668개체였으며 이들 가운데 432개체에서 요꼬가와흡충 피낭유충이 검출되어 48.7%의 감염률을 보였다. 2. 강원도의 20개 하천(남천, 문암천, 불치천, 쌍천, 양양군의 남대천, 전천, 삼척군의 오십천, 궁촌천, 동막천, 용화천, 임원천, 호산천, 가곡천)에서 채집한 237개체의 은어를 조사한 결과는 110개체에서 피낭유충이 검출되어 그 감영률은 46.4%이었다. 3. 경상북도의 12개 하천(나곡천, 울진읍의 남대천, 왕비천, 척산천, 평해천, 군무천, 송천, 남호동천, 부홍천, 영덕읍의 오십천, 지경천, 대종천)에서 채집한 112개체의 은어를 조사한 결과는 57개체에서 피낭유충이 검출되어 그 감염률은 50.9%에 이르렀다. 4. 경상남도의 17개 하천(태화강, 회야강, 효암천, 이촌천, 밀양강, 진전천, 진동천, 산촌천, 연초천, 회화천, 남강, 진교천, 화계천, 고하천, 죽천천, 서상천, 동천)에서 채집한 139개체의 은어를 조사한 결과는 94개체에서 피낭유충이 검출되어 그 감염률은67.6%이었다. 5. 전라남도의 19개 하천(동천, 옥곡천, 이사천, 곡성천, 곡성군의 섬진강, 연곡천, 구례군의 섬진강, 서시천, 곡천, 고흥천, 성근천, 관산천, 여의천, 수문천, 해창천, 탐진강, 수양천, 어송천, 운전천, 앞내천)에서 채집한 167개체의 은어를 조사한 결과는 158개체에서 피낭유충이 검출되어 그 감염률은 94.6%를 보였다. 6. 전라북도의 인천강에서 채집한 1개체의 은어를 조사한 바 피낭유충이 검출되었다. 7. 그리고 제주도의 강전천에서 채집한 12개체의 은어를 조사한 바 모든 개체에서 피낭유충이 검출되어 100%의 감염률을 보였다.

• 한국환경보건학회지
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• 제28권2호
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• pp.51-60
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• 2002

Concerning the water quality management plan about Buk-stream, Ohsip-stream and Gagok-stream water systems in this research, which objectives of abstract is as follows. The result of cleanness degree evaluation of water quality in this research, the first grade was 91% shared in Buk-stream water system. The most point of the middle and upper stream of Buk-stream was maintain extremely clean water quality. Among the researched water system, the first grade of water quality in Ohsip-stream water system was most poor, its first garde rate was 68%. In all water quality check point of Gagog-stream water system was accomplished extremely clean water quality condition of first grade of BOD. The calculation result of pollutant loading density, which were 8.2, 21.5, 4.0kg/day.$\textrm{km}^2$. respectively and basin of Buk-stream and Gagok-Stream have high development potentiality.

• 한국조경학회지
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• 제27권5호
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• pp.138-149
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• 2000

The purpose of this study is to evaluate Suwon stream naturalness Index(S.N.I). and tofind out stats, problems and opportunities of the Suwon stream by assessment standard. Assessment standard is mainly based on physical structure of stream environment. the purpose evaluating sectors and elements are physical form and structure restoration of stream. To find out assessment standard of stream naturalness index, conceptual frame of assessment standard has been established, for which four sections, for example, longitudinal section, lateral section, stream bottom structure and water environment, have been selected. Overall stream naturalness index of the Suwon stream has been distributed at 3rd to 4th grade, and 3.3 of assessment index and mode were 3rd grade respectively. stream naturalness index of each section was as follows: Longitudinal section accounted for 3.7in average to be 4th grade, lateral section did 3.8 to be 4th grade, and water environment did 2.4 to be 2nd grade. Analysis of assessment outcome of stream naturalness index has checked status, problems and opportunities of corresponding stream. Assessment of stream naturalness index of the study provides useful information for restoration of close-to-nature stream, and furthermore has its meaning in checking problems and opportunities of Suwon stream.

• 한국조경학회지
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• 제30권3호
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• pp.73-85
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• 2002

The purpose of this study was to develop prediction models for plant species abundance by stream restoration. Generally the stream plant is affected by stream gemophology. So in this study, the relationship between the vegetation abundance and stream gemophology was developed by multiple regression analysis. The stream characteristics utilized in this study were longitudinal slope, transectional slope, micro-landforms through the longitudinal direction, riparian width and geometric mean diameter and biggest diameter of bed material, and cumulated coarse and fine sand weight portion. The Pyungchang River with mountainous watershed and the Kyungan stream and the Bokha stream in the agricultural region were selected and vegetation species abundance and stream characteristics were documented from the site at 2~3km intervals from the upper stream to the lower. The Models for predicting the vegetation abundance were developed by multiple regression analysis using SPSS statistics package. The linear relationship between the dependant(species abundance) and independant(stream characteristics) variables was tested by a graphical method. Longitudinal and transectional slope had a nonlinear relationship with species abundance. In the next step, the independance between the independant variables was tested and the correlation between independant and dependant variables was tested by the Pearson bivariate correlation test. The selected independant variables were transectional slope, riparian width, and cumulated fine sand weight portion. From the multiple regression analysis, the $R^2$for the Pyungchang river, Kyungan stream, Bokga stream were 0.651, 0.512 and 0.240 respectively. The natural stream configuration in the Pyungchang river had the best result and the lower $R^2$for Kyunan and Bokha stream were due to human impact which disturbed the natural ecosystem. The lowest $R^2$for the Bokha stream was due to the shifting sandy bed. If the stream bed is fugitive, the prediction model may not be valid. Using the multiple regression models, the vegetation abundance could be predicted with stream characteristics such as, transection slope, riaparian width, cumulated fine sand weigth portion, after stream restoration.

• 한국습지학회지
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• 제11권2호
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• pp.89-98
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• 2009

본 연구는 하천종단면에 정보엔트로피이론을 적용하여 평균하천경사, 하천경사 및 하천종단고도 결정방법을 제시하였다. 최대화된 엔트로피는 제약조건하에서 일정한 하천종단면의 확률분포를 만들며, 이와 같은 관계를 이용하여 평균하천경사, 하천경사 및 하천종단고도 산정식을 유도하였다. 충북 지방하천 정비기본계획에서 얻은 달천유역의 실측된 지형학적 인자를 사용하여 매개변수를 최소자승법으로 결정하였다. 유도된 평균하천경사와 하천종단고도식을 실제유역에 적용하였으며, 실측치와 잘 일치함을 나타낸다. 본 연구의 결과로부터 평균하천경사와 하천종단고도의 결정에 직접 적용할수 있을 것으로 판단된다.

• 한국산업융합학회 논문집
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• 제6권4호
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• pp.315-324
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• 2003

The purpose of this is to evaluate Hakui Stream Naturalness Index(S.N.I). and to find out stats, problems and opportunities of the Hakui stream by assessment standard. Assessment standard is mainly based on physical structure of stream environment. The purpose evaluating sectors and elements are physical form and structure restoration of stream. To find out assessment standard of stream naturalness index, conceptual frame of assessment standard has been established, for which four sections, for example, longitudinal section, lateral section, stream bottom structure and water environment, have been selected. Overall stream naturalness index of the Hakui stream has been distributed at 3rd to 4th grade, and its assessment index accounted for 3.2 to be 3rd grade, and its mode also did 3rd grade. Stream naturalness index of each section was as follows: Longitudinal section index accounted for 3.6 in average to be 4th grade, and later section index did 3.0 to be 3rd grade, and stream bottom structure index did 3.0 to be 3rd grade, and water environment index did 2.7 to be 3rd grade. Analysis of assessment outcome of stream naturalness index has checked status, Problems and opportunities of corresponding stream. Assessment of stream naturalness index of the study provides useful information for restoration of close-to-nature stream, and furthermore has its meaning in checking problems and opportunities of Hakui stream.

• 한국환경복원기술학회지
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• 제7권5호
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• pp.66-74
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• 2004

Since 1960s urban streams in Seoul have been dried and polluted because of urbanization. So, these devastated urban stream environment need to be restored for the better life of residents. Since 1995 stream restoration project which is called Natural-Style Stream Project have begun. However, some projects focused on the restoration of park-style open space rather than restoration of stream environment. As a result there are some stream landscapes to be improved. Therefore, this study aims to investigate the current status of urban stream landscape after Natural Style Stream Project and to propose the alternatives for the urban stream landscape improvement. The study site is Yangjae stream, Seoul.

• 한국환경과학회지
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• 제14권4호
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• pp.405-412
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• 2005

Groundwater in Jeju Island, flowing through main stream, is spring water from underground. To set a fixed quantity of groundwater flowing from surface in a hydrological view, 4 downstream (Woedo stream, Gangjung stream, Yeonwoe stream and Ongpo stream) were selected to calculate the characteristic of baseflow and the base-flow discharge through the data on tachometry. There were 11 to 14 level peak caused by runoff, mostly occurred during monsoon season. Also, duration of runoff was 15 to 25 hours, well reflecting the characteristic of inclined, short stream length in Jeju Island and pervious hydrogeographical feature. In case of Gangjung stream, Yeonwoe stream and Ongpo stream, variation of stream water level by baseflow rose above during summer, which was closely linked to the distribution of seasonal precipitation. From autumn to spring, water level fell below while that of Woedo stream remained the same all year round. Data on the water level observed in Woedo stream and Gangjung stream in every single minutes was applied to weir formula(equation of Oki and Govinda Rao) to calculate baseflow discharge. Also, using the data on current and water level calculated in Ongpo stream and Yeonwoe stream, water level-water flow rating was applied to assess base flow discharge.

• 한국환경생태학회지
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• 제28권3호
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• pp.302-313
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• 2014

모래형 하천과 자갈형 하천의 어류군집 특성을 비교하기 위해 4개의 하천을 선정하여 계절별 조사를 실시하였으며, 출현한 어종 중 한국고유종은 Acheilognathus gracilis 외 24종으로 확인되었다. 홍천강과 무주남대천의 우점종은 Zacco koreanus로 각각 39.9%, 28.4%를 차지하였으며, 양화천은 Rhodeus notatus가 13.6%, 갑천은 Z. platypus가 26.0%로 우점하였다. 군집분석 결과 우점도지수는 0.27~0.63, 다양도지수는 1.92~2.67, 균등도지수는 0.6~0.79, 풍부도지수는 3.09~3.53의 범위로 나타났으며, 우점도지수는 홍천강에서 가장 높고, 다양도, 균등도, 풍부도지수는 양화천에서 가장 높게 나타났다. 내성도 길드 분석 결과 하상구조물이 다양한 홍천강과 무주남대천은 민감종이 각각 50.1%와 46.4%로 비교적 높은 비율을 차지하였고, 모래 하상이 높은 양화천과 갑천은 민감종이 각각 0.5%와 5.3%의 희소한 비율을 차지하였다. 하천별 출현한 어류의 종별 개체수와 하상구조를 이용하여 유사도를 분석한 결과 자갈형 하천인 홍천강과 무주남대천이 종과 개체수는 50.4%, 하상구조는 95.2%로 가장 유사하였다. IBI 분석결과 홍천강과 무주남대천이 'A등급', 양화천과 갑천이 'B등급'으로 나타났고, 주성분 분석결과 자갈형 하천과 모래형 하천의 2개의 그룹으로 구분되었다.

• 한국환경복원기술학회지
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• 제11권4호
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• pp.24-36
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• 2008

The essence of a natural stream restoration project is providing habitats for various creatures in terms of the stream's environmental function. This research suggests the problems of natural stream restoration project by studying streams in terms of habitats for creatures and reviewing the national and international cases on existing natural stream restoration project. As a solution for the above, this research suggests a preservation method for biotope of upper stream areas focusing on the fish biotope area considering the ecological characteristics and preservation value of the respective stream so that the stream can be preserved as habitats for creatures. The research was carried out on Cheonglimli Baekcheon region which is an upper stream area of Buan-Dam located in the public park in Byunsanbando, Buangoon, Jeonlabookdo. We suggest the preservation method based on the habitat environment and keystone species of fish. The habitat environment evaluation was carried out mainly being divided into three groups namely, habitats and surrounding environment, reservoir's features and fish way and the diversity of fish. By improving the problematic elements discovered through such evaluation, it tries to improve the biotope of the stream and continuously preserve the stream. In addition, in order to restore the stream as habitats for various creatures, this research suggests to select keystone species which are suitable for the stream environment and restore the habitats based on the keystone species rather than restoring habitats for all species. Fish not only plays the role of a consumer of Epilithic algae and water beetles but also plays an important ecological role as a food for birds or small mammalia. If such ecologically important biotope for fish is preserved, the ecological environment of the stream will be maintained more stably.