• 한국농공학회:학술대회논문집
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• 한국농공학회 1998년도 학술발표회 발표논문집
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• pp.331-337
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• 1998

This study was carried out to derive optimal design floods by Weibull-3 distribution with the annual maximum series at seven watersheds along Man, Nagdong, Geum, Yeongsan and Seomjin river systems. Adequacy for the analysis of flood data used in this study was acknowledged by the tests of Independence, Homogeneity, detection of Outliers. Parameters were estimated by the Methods of Moments and L-Moments. Design floods obtained by Methods of Moments and L-Moments using different methods for plotting positions in Weibull-3 distribution were compared by the rotative mean error and relative absolute error. It has shown that design floods derived by the method of L-moments using Weibull plotting position formula in Weibull-3 distribution are much closer to those of the observed data in comparison with those obtained by method of moments using different formulas for plotting positions in view of relative mean and relative absolute error.

• 한국제4기학회지
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• 제8권1호
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• pp.33-42
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• 1994

The study area is filled up by alluvium which can be classified into lower and upper beds by the facies of deposits and their degree of weathering. The lower bed is not of marine but of fluvial. The upper bed is mainly composed of clay and silt or fine sand beds col-ored dark or dark gray which are of neritic or brackish yielding mollusca fossils. The oyster(Crassostrea ariakensis) obstained from the depth of 3m below the present sea level in the upper bed was dated at 4,100 110Y.B.P. and the veneridae(Meretrix lamarck) 1m height above the present delta plain in the old sand bar was dated at 1,700 85Y,B,P. It is therfore concluded that the study area a small kern col of terrestri-al basin prior to postglacial age had experienced the Holocene transgression. Consequently the study area is considered to have been progressively formed under neritic or brackish circumstance before 1,700Y.B.P.

• 한국제4기학회:학술대회논문집
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• 한국제4기학회 2002년도 한몽 제1차 합동세미나 발표요지
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• pp.94-95
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• 2002

South Korea is divided into five ecoprovinces and sixteen ecoregions. The criteria for ecoprovince classification are ecosystem connectivity and cultural homogeneity. Ecoregions are classified by cluster analysis. The variables used in the analysis are latitude, longitude, seasonal mean temperature, and seasonal precipitation. The large forest fires occurred in the specific ecoregions including Kangwon coastal ecoregion, WoolYoung coastal ecoregion, Hyungsan Taehwa coastal ecoregion, Upper Nagdong river basin ecoregion and Southeastern inland ecoregion. The largest forest fire in the korean history occurred in Kangwon coastal ecoregion in the year 2000. The fire devastated the forestland over 25,000ha. Korea Forest Service, Ministry of Environment, Province Kangwon and NGO organized an investigation committee for the restoration of the burnt area. The committee suggested restoration principles and also forged a restoration strategy of the Kangwon burnt area.

• 한국농공학회지
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• 제42권3호
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• pp.45-55
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• 2000

This study was carried out to derive optimal design low flows bythe Weibull-3 and Wakeby distributions for the partial consecutive duration series at seven watersheds along Han. nagdong, Geum Yeongsan and Seomjin river systems. L-coefficient of variation L-skewness and L-kurtosis were calculated by the L-moment ratio respectively. Parameters were estimated by the method of L-Moments with consecutive duration. Design low flows obtained by method of L-Moments using with consecutive duration, Design low flows obtained by method of L-Moments using different methods for plotting positions formulas in the Weibull-3 and Wakeby distributions were compared by the Root Mean Square Errors(RMSE). It has shown that design low flows derived by the method of L-moments using Weivull plotting position formula in Wakeby distribution were much closer to those of the observed data in comparison with those obtained by the methods of L-moments with the different formulas for plotting positions in Weibull-3 distribution from the viewpoint of Root Mean Square Errors.

• 한국농공학회:학술대회논문집
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• 한국농공학회 1999년도 Proceedings of the 1999 Annual Conference The Korean Society of Agricutural Engineers
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• pp.531-536
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• 1999

This study was carried out to derive optimal design drought flows by the Weibull-3 and Wakeby distributions for the annual drought flows series at seven watersheds along Han, Nagdong, Geum, Yeongsan and Seomjin river systems. L-coefficient of variation , L-skewness and L-kurtosis were calculated by the L-moment ratio respectivley. Parameters were estimated by the Methods o fL-Moments with continuous duration. Design drought flows obtained by Methods of L-Moments using Weibull plotting positions formula in the Weibull-3 and Wakeby distributions were compared by the Relative Mean Errors(RME), Relative Absolute Errors (RAE) and Root Mean Square Errors(RMSE). It has shown that design drought flows by the Wakeby distribution using method of L-moments are much closer to those of the observed data in comparison with those obtained by the Weibull-3 distribution using method of L-moments.

• 한국수산과학회지
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• 제13권3호
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• pp.103-108
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• 1980

1) 1979년 1월에서 1980년 4월사이 매월 대조때 3일간, 소조때 2일간(1979년 1, 2, 3월 및 1980년 1, 2, 3월은 격일) 낙동강 물금 부산시 상수도 취수장원수의 전기전도도, 염화이온, 황산이온, 칼슘, 마그네슘, 나트륨, 칼륨의 량을 매시간 측정하였다. 2) 각성분량의 1979년 1월에서 1980년 4월까지의 변동범위 및 평균치는 다음과 같다. 전기전도도 $99\~912\mu\mho/cm,\;200\mu\mho/cm$ 염화이온 $6.0\~256ppm$, 17.2ppm, 황산이온 $4.1\~37.9ppm$, 23.5ppm, 칼슘 $4.2\~28ppm$, 18ppm, 마그네슘 $2.2\~23ppm$, 5.6ppm, 나트륨 $5.0\~126ppm$, 14ppm, 칼륨 $1.2\~10.8ppm$, 2.6ppm. 3) 조사기간중 염화이온농도이 상수도 수질기준치인 150ppm을 넘는 경우는 1980년 2월 13일 12, 13, 14시와 2월 28일 13시의 4번이 있었다. 4) 매월 대조일과 대조때가 소조때 보다 높으나 그 차는 별로 크지 않다. 5) 계절별 각성분량의 변동을 대체로 동계가 하계보다 높으나 그 차는 별로 크지 않고 거의 일정하다. 6) 염화이온량의 매월 시간적변동은 뚜렷하지 않다. 대체로 최고만조시각과 최고염화이온농도 시간과의 차는 약 4시간의 시차가 있다. 본 연구는 문교부 학술연구조성비의 보조로 했습니다. 감사드리는 동시에 실험을 도와준 연구실의 여러분에게도 감사드립니다.

• 환경생물
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• 제30권4호
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• pp.319-327
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• 2012

하구둑이 형성되지 않은 자연 하천을 유지하고 있는 섬진강 하구의 어류상을 조사하고 주요 어종의 개체군 생태를 분석하였다. 조사 결과 섬진강 하구에서 출현한 어류는 13목 26과 68종이었으며 전체 우점종은 큰줄납자루 (37.4%), 아우점종은 황어 (10.5%)였고 피라미(8.4%), 주둥치(5.1%)순으로 개체수가 많았다. 회유성 어종은 뱀장어, 황어, 은어, 연어, 숭어, 점농어, 민물검정망둑 7종이 출현하였고 한국고유종은 임실납자루와 칼납자루 등 20종이었다. 상류 담수역에서는 8과 35종이 채집되었고 우점종은 큰줄납자루 (38.2%), 아우점종은 참중고기 (11.5%)였으며, 하류 담수역은 13과 37종이 출현하였고 우점종은 큰줄납자루 (48.5%), 아우점종은 피라미 (13.0%)였다. 하구의 기수역은 19과 34종이 확인되었고 우점종은 황어 (42.6%), 아우점종은 주둥치 (13.2%)로 나타났다. 누치 등 주요 종에 대한 개체군 건강도 지수는 하구둑이 설치된 낙동강 집단에 비해 높게 나타나 하구둑 조성이 없는 섬진강 어류 집단이 안정적인 성장을 하고 있다고 본다.

• 한국수산과학회지
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• 제11권3호
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• pp.129-138
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• 1978

The contents of inorganic conservative constituents in the downstream water were determined in spring tides of every month from May 1977 to April 1978 at eight stations of Nagdong River. Samples were taken at the intervals of one or two hours from 7 a. m. to 7 p. m. at each station. Annual ranges and means of the chemical constituents over all the stations except station one, Kupo, ate as follows: pH 6.4-9.3, 7.7; electrical conductivity $0.085-0.345\times10^3\;\mu\mho/cm,\;0.196\times10^3\;\mu\mho/cm;$ chloride 5.8-50.0ppm, 17.7ppm: fluoride ND-0.19 ppm, 0.06 ppm: sulfate 5.5-41.1 ppm, 20.7 ppm; calcium 6-26 ppm, 17 ppm; magnesium 2.0-12.8 ppm, 5.1 ppm; sodium 7-26 ppm, 13 ppm; potassium 1.4-3.8 pprn, 2.3 ppm respectively. The seasonal variations of contents of the chemical constituents were not large and showed nearly definite values at all the stations except station one, Kupo. At station one, seasonal variations were large and the contents were excessively high due to inflow of seawater compared with other stations. The values over 50 ppm in chloride were not determined during the determination period at Mul Geum where the intake station for Busan city water is located. Most constituents except pH and fluoride were over the criteria for drinking water at Kupo, while at other stations only pH value was exceeded the upper limit of the criterion especially in summer period. The pH values tended to increase in the afternoon when water temperature was high. The chloride concentration was shown the highest value at station one, Kupo, with about 2 hours delay after high water of Busan harbour and 3-3.5 hours at Mul Geum.

• 한국동물학회지
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• 제27권1호
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• pp.25-34
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• 1984

韓國産 Liobagrus屬의 2종 魚類에 대하여 形態的 特徵과 水溶性 蛋白質의 電氣泳動像을 水系別로 比較하였다. 形態的인 特徵에 있어서 漢江産 L. andersoni는 錦江 및 洛東江에서 採集된 L. mediadiposalis와 顯著한 차이가 있었으나 錦江産 L. andersoni는 區分되는 形態的 特徵이 上記 2種間에 부분적인 一致를 보일뿐만 아니라 體長에 對한 體幅比는 독특한 값을 나타내었다. 이같은 類以性 및 差異는 각종 조직을 分離 SDS PAGE한 蛋白質 樣相에서도 나타났으며, 특히 筋肉蛋白質 樣相 比較에서 분명하였다. 筋蛋白質의 二次元電氣泳動像에서는 더욱 뚜렷하게 差異나는 수종의 저분자 蛋白質이 探知되었다. 本 硏究에서 얻은 電氣泳動에 의한 蛋白質 分劃像은 形態的 比較와 一致를 보일 뿐만 아니라 微量蛋白質 組成까지 細部的인 比較를 가능케하므로 Liobagrus屬의 水系에 따른 差異 및 分類가 電氣泳動에 의해서 신빙성있게 이루어질 수 있음을 보였다. 以上의 결과에 비추어 볼 때 錦江에서 採集되는 L. andersoni 類似 標本은 漢江의 L. andersoni와는 별도로 分類되어야 한다고 보며, 이를 漢江産의 地理的變異型, 또는 上記 究明된 두 종간의 自然雜種 내지는 別種인지의 與否를 명확히 하기 위한 몇가지 具體的인 檢討 必要하다고 본다.

• 한국지반공학회:학술대회논문집
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• 한국지반공학회 2006년도 춘계 학술발표회 논문집
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• pp.876-881
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• 2006

This study was carried out to understand depositional environment and genesis of clayey soils that distributed in the Dongup area. On the basis of detailed observation and description on mineralogy, geochemical composition, geophysical properties, paleontological analysis of cored sediments, three sedimentary unit have been distinguished. From bottom to top, they are early Holocene freshwater muddy deposit(Unit I, fluvial swamp), late Holocene silt and muddy deposit(Unit II, alluvial deposit), late Holocene muddy deposit(Unit III, fluvial swamp). Unit II is divided into three part: the lower part-unweathered massive silt and muddy deposit, middle part-weathered layered slit and muddy deposit and upper part-weathered massive muddy deposit.