• 한국콘텐츠학회논문지
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• 제10권11호
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• pp.452-460
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• 2010

본 연구는 하천유형별 식생모델의 계획 홍수위에 대한 1차원 HEC-RAS 및 2차원 RMA-2 수치모형을 이용하여 홍수위 안정성 검토를 수행하였다. 식생모델은 하천을 흐르는 수로구간이 사회 문화적으로 위치하는 중요도에 따라 도시 농촌 산지하천으로 구분해 구축하였다. 수치모형에 의한 홍수위 검토결과는 대상하천의 식생 전 홍수위는 각 하천의 계획홍수위와 비슷한 양상을 보였다. 또한 식생밀도를 변화시킨 도시하천의 경우는 식생밀도 25% 추가 시 홍수위 상승량은 약 0.20m 정도이나 제방월류는 나타나지 않았다. 농촌 및 산지하천의 경우에는 홍수위 상승량 변화가 거의 없는 것으로 나타났다.

• 한국실내디자인학회논문집
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• 제21권5호
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• pp.355-362
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• 2012

Water Culture Pavilion was constructed as a part of dam construction and Four-major rivers restoration projects, which have the purpose to prevent damage of natural disaster, localized heavy rain and drought, and has several functions; promotion, education and region culture community. Exhibition space in this culture pavilion should have the excellent connection of various media, contents, and exhibition space because of limited space. The purpose of this study is to analyze flows, continuation and connection of exhibit space with the perspectives of the attribute of water and to suggest various content things, technical, spatial types. This study targets Four-major rivers Water Culture Pavilion in Korea and suggests exhibition presentation methods as analyzing contents, media and constituent of exhibition space for each pavilion exhibition. The result of this study is as follows : First, the circulation is common expressed attribute of water in these four water culture pavilion. The reason is that there is a connection between Four-major rivers restoration projects and the physical attribute of water circulating the steps of evaporation, condensation and precipitation. Second, each pavilion presents circulative solid exhibit, circulative background exhibit, circulative reflective exhibit based on circulation. These three types of exhibition is related the floor separation. Third, each pavilion exhibit zone shows the most circulation, solid, background, reflexibility through educational contents and promoting contents by using graphic, video, sound media.

• 한국정보통신학회:학술대회논문집
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• 한국정보통신학회 2013년도 추계학술대회
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• pp.184-187
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• 2013

K-water(한국수자원공사)는 4대강 정비사업(약칭, 4대강 사업)을 2009년 상반기부터 추진하였다. 4대강 사업은 수환경에 적응한 하천 내에서 준설, 제방보강과 보를 통한 물그릇을 만들어 가뭄 홍수와 같은 기후변화에 선제적으로 대응하고자 하였다. 또한, 물그릇에 오염물질이 유입되는 것을 근본적으로 막으며, 하천 내 경작지를 생태하천과 습지로 복원하여, 환경생태 등 하천에 생명이 살아나게 하고자 하였다. K-water는4대강 사업에서 구축된 시설물을 운영관리하기 위하여 최신의 수자원 정보통신 설비들이 적용되었으며, 국민들의 마시는 물을 생산하는 수도시설에도 시설통합을 위한 정보통신 기술들이 적용하고 있다. 이러한 정보통신기술을 적용하면서 첫째로 수집되는 데이터를 통합하여 분석할 수 있는 모델링을 개발하여 최적의 의사결정을 할 수 있는 시스템을 개발과 둘째로 통합운영에 사용되는 MMI (Man Machine Interface) 프로그램을 국산으로 개발하여 사용과 유지관리의 편리성을 도모하고 셋째로 수자원분야에 설치된 설비간의 원활한 통신을 위한 프로토콜 표준화의 필요성을 제안하였다.

• Parasites, Hosts and Diseases
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• 제27권1호
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• pp.41-46
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• 1989

우리 나라 5대 강의 19개 하천에서 피라미와 갈겨니 총 370마리를 1988년 6월부터 9월까지 포획하고 개체별로 인공소화시켜 C. armatus 피낭유충 감염상을 조사하였다. 피라미의 피낭유충 감염률은 평균 86.8%, 어체당 피낭유충 수는 평균 224개(1∼5,431)이었으며, 갈겨니에서는 78.5% 및 131개(1∼2,711)이었다. 한강 수계에서 포획된 어류의 피낭유충 감염률과 어체당 피낭유충 수는 평균 73.4% 및 32개(1∼289)이었으며, 영산강산 어류는 각각 88.0% 및 44개(2∼176)이었다. 금강, 탐진강 및 섬진강산 어류는 모두 피낭유충에 감염되어 있었으며 어체당 평균 피낭유충 수는 지역별로 각각 45개(2∼243), 59개(3∼311) 및 119개(1∼1,682)이었다. 낙동강 수계에서 포획된 어류의 피낭유충 감염률은 81.0%이었으며 어체당 피낭유충 수는 평균 348개(1∼5,431)이었다. 이 연구로 C. armatus 는 우리 나라 5대 강 유역에 널리 분포하고 있음을 확인하였다.

• Ocean and Polar Research
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• 제31권1호
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• pp.31-50
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• 2009

The demarcation of Maritime Boundary is directly related to the expansion of jurisdiction and the securing of resources. Resource diplomacies of the three countries Korea, China and Japan represent a major task for the national administrations : to secure resources as well as to stablize and sustain resources for future national economies. At the sea area around Korea as well, countries are fiercely competing to secure resources and to expand jurisdiction. This is evidenced by the fact that various principles and logics which are beneficial to each own country are presented through international precedents, agreement between countries and the theories of the international law scholars. They say that the conclusion of demarcation of maritime boundary for the Yellow Sea would be easy from the point that there is no dispute related to island dominion in the waters of the Korean Peninsula especially the Yellow Sea, but still we need to have a strategic approach to this issue from the point that the factors used for claiming maritime boundaries may expand the waters of a country over much. For example, the continental shelf boundary in consideration of the distribution of sedimentary deposits in the Yellow Sea which is being raised by China began from the hypothesis that the inflow of sedimentary deposits to the Yellow Sea through the rivers of China represents absolute majority, but the results of the latest studies raised questions on the hypothesis. Especially, the studies done by Martin and Yang revealed that the inflow of sedimentary deposits to the Yellow Sea from the Yellow River is approximately less than 1% of total sedimentary deposits in the Yellow Sea, and also the result of analysis on the causes and counter policy measures on the environment of Bohai, China supports the reliability of the results of such studies. From a legal aspect, the sedimentary deposits of rivers which are claimed by China represent extremely weak ground for the claim for the title of the continental shelf. The siltline claimed by China seems to be based on the Article 76-4-(a)(i) of UNCLOS. This is, however, not the definition on the title of the continental shelf but it is only a technical formula to utilize in a case where a country desires to expand the continental shelf to over 200 nautical miles. Scientific and Technical Guidelines of the Commission on the Limits of the Continental Shelf also confirm this point through the Article 2.1.2 of the Guideline. The only case in which sedimentary deposits of rivers were referred to as concrete demarcation of maritime boundary was in the which was concluded in 1986 between India and Myanmar at the Andaman Sea. In the said case, India acknowledged the boundary up to the isobath of 200m which Myanmar claimed based on the sedimentary deposits of the Irrawaddy River. It has limits as a case for acknowledging the sedimentary deposits, however, because in fact India's acknowledgment was made in exchange for the condition that Myanmar gave up the dominion of two islands which they had been claiming from India up until that time.

• 물과 미래
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• 제55권9호
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• pp.98-104
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• 2022

• 한국수자원학회논문집
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• 제53권2호
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• pp.141-154
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• 2020

우리나라에서 일어나는 하천 내 유해화학물질 유입사고 발생건수는 매년 증가하는 추세를 보이고 있다. 이에 대응하기 위해 국가차원의 수질오염 사고대응체계를 구축하여 사고방재를 위한 체계적인 절차를 수립하였으나, 우리나라의 사고대응체계는 해외의 수질모형을 차용하고 있기 때문에 모형의 매개변수 입력 및 검보정에 어려움이 있다. 이에 따라 본 연구는 하천에 유출된 유해화학물질의 거동을 분석하기 위한 수심 평균 2차원 하천수질모형을 개발하고, 유해화학물질의 특성을 고려한 유의반응항 판별을 통해 효율적 모의수행을 위한 기법을 제시하였다. 수심 평균 2차원 하천수질모형인 CTM-2D에 흡·탈착, 휘발 반응을 재현할 수 있는 반응항을 추가하고, 이를 검증하기 위해 해석해와 수치해를 비교한 결과 0.1% 미만의 오차를 보여 모형의 타당성을 입증하였다. 또한 낙동강-금호강 합류부에 수질오염사고 가상시나리오를 구성하여 개발된 모형을 적용하였으며, 민감도 분석 기반 유의반응 판단을 통해 효율적 수질모의를 수행할 수 있었다.

• 한국해양생명과학회지
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• 제3권1호
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• pp.9-21
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• 2018

This study investigated cytogenetic and hematological and histological characteristics between diploid and spontaneous triploid on Cyprinidae (Crucian carp, Carassius auratus; crucian carp, C. cuvieri and common carp, Cyprinus carpio) in four major rivers of Korea. In our results, DNA contents of triploid Cyprinidae were 50% more than those of diploid Cyprinidae. Also, erythrocyte size of triploid Cyprinidae was 50% larger than those of diploid Cyprinidae. In all sampling rivers, sex ratios of C. auratus were biased to female, and especially, triploid groups of C. auratus were all female groups (p<0.05). In principle, sex ratios of C. cuvieri and common carp were equivalent between male and female.

• 한국지하수토양환경학회지:지하수토양환경
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• 제27권5호
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• pp.1-9
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• 2022

A correlation analysis was performed to investigate differences in the response of surface water and groundwater to drought using the Standardized Precipitation Index (SPI). Water level data of 20 agricultural reservoirs, 4 dams, 2 rivers, and 8 groundwater observation wells were used for the analysis. SPI was calculated using precipitation data measured at a nearby meteorological station. The water storage of reservoirs and dams decreased significantly as they responded sensitively to the drought from 2014 to 2016, showing high correlation with SPI of the relatively long accumulation period (AP). The responses of rivers varied greatly depending on the presence of an upstream dam. The water level in rivers connected to an upstream dam was predominantly influenced by the dam discharge, resulting in very weak correlation with SPI. On the contrary, the rivers without dam exhibited a sharp water level rise in response to precipitation, showing higher correlation with SPI of a short-term AP. Unlike dams and reservoirs, the responses of groundwater levels to precipitation were very short-lived, and they did not show high correlation with SPI during the long-term drought. In drought years, the rise of groundwater level in the rainy season was small, and the lowered water level in the dry season did not proceed any further and was maintained at almost the same as that of other normal years. Conclusively, it is confirmed that groundwater is likely to persist longer than surface water even in the long-term drought years.

• 한국환경복원기술학회지
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• 제13권2호
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• pp.95-104
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• 2010

The purpose of this study is to analyze the correlation between physical stream characteristics and bed materials in natural rivers. Accordingly, four natural rivers were selected reference streams, they were Nam river, Sumjin River, Naesung River and Han River. Grain size distributions of bed materials were gravels, cobbles and boulders in Han river and Nam river, were sand, gravels, cobbles and boulders in Sumjin river and were sand in Naesung river. Four reference streams were divided into each two reference reaches (straight and bend) by plan and profile characteristics of naturally meandering stream. Therefore various reference reaches were chosen in the aspect of physical stream characteristics and grain size distributions. The results investigated and analyzed are as follows. The streams that grain sizes distributions of river bed materials were coarse were stable because they had variety of bed slope without sediment deposition, and then the riffles frequency and the physical characteristics were various. Also, velocitydepth regime were various in four kinds, and the response parts for water level change were small, so that channel flow status were stable and excellent condition. On the other hand, sand river that grain sizes distributions of river bed materials were fine had not the variety of parameters as velocity-depth regimes, sediment deposition, channel flow status and riffles frequency, so that the physical stream characteristics were not various.