• Ocean and Polar Research
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• 제37권4호
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• pp.295-315
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• 2015

In order to determine the spatio-temporal distribution of macrobenthic faunal communities in Jinhae Bay, quantitative faunal samples were collected seasonally at 23 sites in Jinhae Bay from February, 2011 to November, 2012. Sediment facies were found to be mud except for those at Chilcheon-do near Geoje Island. Mean values of TOC (%) ranged between 1.3 and 3.6%, and these are the highest values recorded excluding special management areas in Korea. Hypoxia occurred every summer in the whole areas of Jinhae Bay except around Geoje Island in the bay mouth. Due to the summer hypoxia, species richness, density and biomass also declined during the summer in Jinhae Bay. Opportunistic species such as Paraprionospio patiens, Sigambra bassi, Nectoneanthes oxypoda and Theora fragilis occurred as the dominant species before and after the hypoxia. However, Capitella capitata appeared as a dominant species only during the winter-spring season every year. From cluster analysis, Jinhae Bay could be divided into two sites groups: one group occupied the normoxic zone and the other one located in the hypoxic zone.

• 한국산학기술학회논문지
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• 제13권2호
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• pp.885-892
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• 2012

연안구역 관리지표는 연안통합관리의 정책수립 이행과정에 중요한 의사결정수단으로 활용되며, 통합적 관점에서 평가하고 부문별 상호작용을 이해하고 분석할 수 있는 유용한 도구이다. 이에 대부분의 국제사회기구와 선진 연안국들은 현 연안환경과 사회 경제적 상태를 정기적으로 점검하고 연안구역관리정책의 효과성을 파악하기 위하여 연안구역관리 지표체계를 개발하고 있는 추세이다. 따라서 본 연구는 국내외 연안구역관리 지표체계를 크게 자연 환경적측면, 사회 경제적 측면, 네트워크 측면으로 구분해 각 차원별 연안구역관리 지표체계의 장 단점을 파악하고 비교 분석해 연안구역관리 지표체계의 특성을 도출하였다. 이를 통해 이 연구는 지속가능한 연안구역관리의 실현을 위한 관리수단, 다양한 이해관계자들의 과학적 의사결정수단, 연안통합관리의 실효성 평가수단, 연안구역관리 지표체계의 이원화 등을 선진사례의 공통된 특성으로 도출하였다. 마지막으로 본 연구는 국내외 연안구역관리 지표체계에서 나타난 공통의 가치를 바탕으로, 지역차원에서 국내 연안구역관리 지표의 올바른 설정을 위한 시사점을 제시하였다.

• 한국환경생태학회지
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• 제32권6호
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• pp.639-645
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• 2018

본 연구는 제2차 국립공원 구역조정 시기(2010년~2011년) 해제된 지역의 용도지역, 건축물 조성 등 실제 건축 행위, 토지이용환경, 개별공시지가 등 사회 환경적 요인의 변화를(2011년${\rightarrow}$2018년), 같은 기간 존치지역의 사회 환경 요인과 비교를 통해 구역조정 영향을 분석하고자 하였다. 그리하여 제2차 국립공원 구역조정의 문제점을 파악하고 제3차 구역조정시의 대안적 시사점을 모색하고자 하였다. 해제지역의 용도지역은 계획 생산 보전관리지역으로의 변화가 약 80.4%로 가장 높았고, 농림지역으로 변화가 15.6%였으며 4.0%는 자연환경보전지역으로 유지되어 변화가 없었다. 건축물 조성 규모 변화는 해제지역은 2011년 이후 약 $106m^2$의 평균 건축이 이루어 진 반면 존치지역은 $91m^2$의 평균 건축이 진행된 것으로 분석되었다. 토지이용환경의 변화 요소로써 자연지역에서 인공지역으로의 변화율은 해제지역이 1.9%였고 존치지역은 0.7%로써 해제지역의 변화율이 높았다. 개별공시지가는 해제지역의 증가량은 11,911원이었고 존치지역은 4,413원으로 두 지역 모두 상승하였으며, 두 지역 간 공시지가 차이는 약 2.5배에 달했다. 국립공원내 지역주민의 사유재산권에 대한 문제는 중요한 과제이나 제2차 국립공원 구역조정으로 상당수 해소 되었으므로 이후에는 공원용도지구계획과 공원시설계획에 대한 면밀한 분석으로 합리적 대안을 제시함으로써 공원 주민의 편익을 도모할 필요가 있다. 또한 공원관리청이 주민과 상생 협력하고 국립공원내 거주민으로서 자부심을 가질 수 있도록 지원 체계 마련이 필요할 것으로 판단된다.

• 한국물환경학회지
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• 제34권3호
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• pp.270-284
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• 2018

Paldang is a river reservoir located in the Midwest of Korea, with a water volume of $244{\cdot}10^6m^3$ and a water surface area of $36.5km^2$. It has eutrophied since the construction of a dam at the end of 1973, and the phosphorus concentration has decreased since 2001. Average hydraulic residence time of the Paldang reservoir is about 10 days during the spring season and 5.6 days as an annual level. The hydraulics and water quality of the reservoir can differ greatly, both temporally and spatially. For the spring period (March to May) in 2001 ~ 2017, the reservoir mean total phosphorus concentration calculated from the budget model based on a plug-flow system (PF) and a continuous stirred-tank reaction system (CSTR) was 13 % higher and 10 % lower than the observed concentration, respectively. A composite flow system (CF) was devised by assuming that the transition zone was plug flow, and that the lacustrine zone was completely mixed. The mean concentration calculated from the model based on CF was not skewed from the observed concentration, and showed just 6 % error. The retention coefficient of the phosphorus derived from the CF was 0.30, which was less than those of the natural lakes abroad or river reservoirs in Korea. The apparent settling velocity of total phosphorus was estimated to be $93m\;yr^{-1}$, which was 6 ~ 9 times higher than those of foreign natural lakes. Assuming CF, the critical load line for the total phosphorus concentration showed a hyperbolic relation to the hydraulic load in the Paldang reservoir. This is different from the previously known straight critical load line. The trophic state of the Paldang reservoir has recently been estimated to be mesotrophic based on the critical-load curve of the phosphorus budget model developed in this study. Although there is no theoretical error in the newly developed budget model, it is necessary to verify the validity of the portion below the inflection point of the critical-load curve afterwards.

• 한국수산과학회지
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• 제39권spc1호
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• pp.180-188
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• 2006

We examined the effect of salt marsh vegetation on the benthic environment in macro-tidal flats at Donggeomdo, Ganghwa, on the west coast of Korea. Nine stations were established along a transect across the tidal flats, including salt marsh, and field sampling was conducted monthly from July 1997 to June 1998. During the study period, environmental parameters fluctuated as follows: salinity, 15.0 to 28.2 psu, exposure time, 613 to 702 hr/m, inundation time, 28 to 117 hr/m, sediment organic carbon, 0.71 to 1.34%, nitrogen, 0.07 to 0.16%, sulfur from 0.07 to 0.22%, mean grain size from 6.3 to $6.9{\phi}$, water content from 19.4 to 44.4%, water temperature from 4.4 to $20.4^{\circ}C$ and temperature of the surface sediments, 2.7 to $31.1^{\circ}C$, in total, seven halophyte species were sampled and found to be vertically distributed across the tidal levels. Carer scabrifolia, Suaeda maritima, Limonium tetragonum and Phragmites communis dominated the upper zone of the salt marsh, Juncus haenkei, Triglochin maritimum and P. communis dominated the middle zone, and Suaeda japonica predominated in the lower area. Principal component analysis (PCA) and non-metric multi-dimensional scaling revealed that the zonation of halophytes was related to environmental variables such as salinity and exposure time. The halophyte communities were likely related to the organic content of the surface sediment.

• 해양환경안전학회:학술대회논문집
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• 해양환경안전학회 2003년도 추계학술발표회
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• pp.219-225
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• 2003

The present study intends to assess the long-term steric sea-level change and its prediction, and potential impacts to the sea-level rise due to the 21st global warming in the coastal zone of the Korea in which much socioeconomic activities have been occurred. The analysis of the 23 tide-gauge data near Korea reveals the overall mean sea-level trend of 2.31 mm/yr.In the satellite altimeter data (Topex/Poseidon and ERS), the sea-level trend in the East Sea is 4.6mm/yr. Both are larger than those of the global average value. However, it is quite questionable that the sea-level trends with the tide-gauge data on the neighboring seas of Korea relate to global warming because of the relatively short observation period and large spatial variability. It is also not clear whether the high trend of altimeter data in the East Sea is related to the acceleration of sea level rise in the Sea, short response time of the Sea, natural variability such as decadal variability, short duration of the altimeter. The coastal zone of Korea appears to be quite vulnerable to the 21st sea level rise such that for the I-m sea level rise with high tide and storm surge, the inundation area is 2,643 km2, which is about $1.2\%$ of total area and the population in the risk areas of inundation is 1.255 million, about $2.6\%$ of total population. The coastal zone west of Korea is appeared to be the most vulnerable area compared to the east and south. In the west of the Korea, the North Korea appears to be more vulnerable than South Korea. In order to cope with the future possible impact of sea-level rise to the coastal zone of Korea effectively, it is essential to improve scientific information in the sea-level rise trend, regional prediction, and vulnerability assessment near Korean coast.

• 생태와환경
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• 제53권2호
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• pp.195-207
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• 2020

난온대 동백나무군강의 한국 내 분포 북한계는 연평균 기온 13℃와 14℃, 한랭지수 -10℃로 제안된 바 있다. 본 연구는 이들 기후요소의 지리적 공간분포 실체를 검토하였다. 세 기후요소의 공간분포 양상은 티센망법과 크리깅법으로 분석하였으며, 세 가지 기후도를 생산하여 난온대 주요 상록활엽수종의 현존분포와 그 대응성을 비교·분석하였다. 결과로 난온대 식생의 분포 북한계는 한랭지수 -10℃가 연평균기온 14℃보다 일치하였으나, 연평균기온 13℃가 더욱 정교한 일치를 보여주었다. 한반도에서 연평균기온 13℃를 북한계로 한 난온대 식생역의 잠재 분포 면적은 20,334 ㎢로 다른 두 온도요소의 경우보다 넓었다. 본 연구는 가공하지 않은 직접 기후요소인 연평균기온 13℃가 가공으로부터 생겨난 간접 기후요소인 한랭지수 -10℃보다 난온대 식생 분포 북한계에 대응하는 특정 온도 요소인 것으로 밝혀졌다. 더불어 식물구계학적 특정종의 평가 기준으로 사용되는 난온대 경계선에 대한 학술적 재고의 필요성이 대두되었다.

• 한국습지학회지
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• 제5권1호
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• pp.1-13
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• 2003

Conservation of wetlands are important because wetlands are hatcheries for fishes and habitat for migratory birds and mammals. Wetlands also function as a filter for polluted water and material and transition zone for harboring numerous species of plants and animals. This paper reviewed the importance of wetland conservation and policy on management of wetlands in Korea. Wetland Conservation Act(1999) and Maritime Management Act(1999) are two legislation for conservation of wetlands. Wetland Conservation Act is issued by both Ministry of Environment and Ministry of Maritime Affairs and Fisheries. The definition of wetlands are so diverse, but this paper categorized wetlands as both natural and man-made lakes, mud flat areas and inland wetlands. Management application was considered for each wetland categories.

• KIEAE Journal
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• 제10권3호
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• pp.43-50
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• 2010

Natural lighting is directly connected with our mental and physical health. For working or learning effect, the proper natural lighting is required for improving our living conditions. School facilities, especially, are the place where includes students' ordinary activities with learning behaviors during the school years from elementary to high school. This study was carried out for the purpose introducing a basic database in that planning a school by researching on the actual in the natural lighting system of some schools' classroom, estimating, and analyzing through a simulation, which resulted in a method of improving the natural lighting system. As a result of measuring and analyzing Daylight Factor(DF) during the time from 9 am to 3 pm when students are activating in their classroom, generally DF range of the sides near to window and aisle seats zone are not distributed well. Besides, two out of four school which are researched would not reach the standards of the law for school sanitary while rest of the schools meet the standards; Average DF 5% and Minimum DF 2%. And the result of a simulation by RADIANCE program shows the most appropriate DF range when it is applied in variable numbers about an oriehows the- South-east 15, south-east 30, south-east 45, south-west 15, south-west 30, and south-west 45 degrees. When it is applied in the variable numbers about glass transmittance - 60%, 70%, and 80% in condition facing south of a classroom, the result shows that the DF range of 80% transmittance is relatively higher than other glasses in the classroom. Thus, when a school is built, plans for an orientation is necessary for improve of elementary schools' environment with the glass installation which is made for high transmittance and is regarded with the students' activities time.

• 방사성폐기물학회지
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• 제20권4호
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• pp.429-453
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• 2022

Numerical modeling and scenario composition are needed to characterize the geological environment of the disposal site and analyze the long-term evolution of natural barriers. In this study, processes and features of the hydro-mechanical behavior of natural barriers were categorized and represented using the interrelation matrix proposed by SKB and Posiva. A hydro-mechanical coupled model was evaluated for analyzing stress field changes and fracture zone re-activation. The processes corresponding to long-term evolution and the hydro-mechanical mechanisms that may accompany critical processes were identified. Consequently, practical numerical methods could be considered for these geological engineering issues. A case study using a numerical method for the stability analysis of an underground disposal system was performed. Critical stress distribution regime problems were analyzed numerically by considering the strata's movement. Another case focused on the equivalent continuum domain composition under the upscaling process in fractured rocks. Numerical methods and case studies were reviewed, confirming that an appropriate and optimized modeling technique is essential for studying the stress state and geological history of the Korean Peninsula. Considering the environments of potential disposal sites in Korea, selecting the optimal application method that effectively simulates fractured rocks should be prioritized.