• Proceedings of the Korea Water Resources Association Conference
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• 2018.05a
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• pp.24-24
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• 2018

최근 10년간 우리나라에 빈번하게 발생한 가뭄 가운데 2014년과 2015년에 발생한 가장 극심한 가뭄으로 금강유역은 평년의 84.4%의 강수량을 기록하였고, 특히 2015년 6월부터 9월까지의 강수량은 343.1 mm로 평년 대비 38.3% 수준에 머물렀다. 금강유역 내에 위치한 보령댐은 충남 서부지역 8개 시 군에 생활용수와 공업용수를 공급하고 있는 중요한 수원으로 현재 심각한 물 부족으로 저수율이 30%를 밑돌고 있어 대상지역의 현재 및 장래 물 부족 대책이 필요한 실정이다. 본 연구에서는 보령댐 유역($297.4km^2$)을 대상으로 SWAT(Soil and Water Assessment Tool) 모델과 GCM(General Circulation Model) 기후변화 시나리오를 활용하여 극한 기후변화 사상이 반영된 보령댐의 내한능력을 평가하고자 하였다. 유역의 물수지 분석을 위해 보령댐 유역을 대상으로 기상자료, 보령댐 운영자료를 수집하였으며. SWAT 모형의 신뢰성 있는 유출량 보정을 위해 보령댐의 실측 방류량을 이용하여 댐 운영모의를 고려하였고 유입량 및 방류량 자료를 활용하여 모형의 보정(2005~2009)과 검증(2010~2017)을 실시하였다. 기후변화에 따른 내 저수지 내한능력평가를 위해 APCC의 26개 CMIP5 GCM 자료 중 RCP(Representative Concentration Pathway) 4.5와 RCP 8.5 시나리오 특성을 분석하여 극한 기후 시나리오를 선정하여 Historical 기간(1980~2017)과 미래 기간(2000~2099)을 대상으로 극한 기후변화 사상에 따른 보령댐 유역의 내한능력을 평가하였다.

• The Journal of the Petrological Society of Korea
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• v.1 no.1
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• pp.71-84
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• 1992

This paper reports the results about the petrography and mineral chemistry of 13 representative dredged basaltic rocks from the western Caroline Ridge (WCR) and Yap Trench-Arc system, and provides the chemical and tectonic informations based on the compositions of clinopyroxene phenocrysts. Compositions of olivine phenocrysts in some analyzed samples are Fo$_{86-80}$. Plagioclase phenocrysts have variable compositions ranging from An$_{90}$ to An$_{55}$. The compositions of clinopyroxene phenocrysts vary according to geological environments; titansalite in atoll and guyot of WCR, diopside-augite in trough and bank of WCR, and endiopside in Yap Trench-Arc system. Application of the discrimination schemes proposed by Leterrier et al. (1982) suggests: (1) the samples from atoll-guyot belong to within plate alkali basalt, implying that western CR could be the continuation of eastern CR formed by hot spot magmatism, (2) the samples from the Yap Trench-Arc system with no present-day magmatism clearly indicate the occurrence of orogenic tholeiites presumably related to early island arc magmatisms in this area, however, (3) the samples from the bank and trough do not provide definitive informations, which might indicate the complexity of their origins.

• Proceedings of the Korea Water Resources Association Conference
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• 2020.06a
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• pp.43-43
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• 2020

보령댐은 충남 서부지역 8개 시·군에 생활용수와 공업용수를 공급하고 있는 중요한 수원으로 최근 우리나라에서 발생한 연속적인 가뭄으로 2015년에는 저수율이 7.5 %까지 감소하여 제한급수가 시행되었다. 본 연구에서는 가뭄으로 인한 물 공급 부족에 취약함을 보인 보령댐 유역(297.4 ㎢)을 대상으로 SWAT(Soil and Water Assessment Tool) 모델과 RCP(Representative Concentration Pathways) 시나리오를 활용하여 극한 기후변화 사상이 반영된 보령댐의 내한능력을 평가하였다. SWAT 모형을 활용하여 보령댐의 물수지를 모의하기 위하여 보령댐의 실측 유출량, 저수량, 방류량으로 보령댐 유입량과 저수량을 보정(2002~2004) 및 검정(2005~2007)하였으며, 실측 저수량을 기반으로 미래 댐 운영을 모의하였다. 검·보정 결과, 댐 유입량과 저수량의 PBIAS(%)는 -0.04, -0.09, NSE(Nash and Sutcliffe Efficiency)는 0.52, 0.96, RMSE(Root Mean Square Error)는 1.80 mm/day, 0.67 × 10⁶㎥로 분석되어 신뢰성 있는 모의 결과를 보였다. 보정된 SWAT 모형으로 가뭄 사상이 반영된 기후변화를 모의하기 위하여 APCC의 26개 CMIP5 GCM 시나리오를 SPI (Standardized Precipitation Index)와 연속 이론(Runs theory)으로 분석하여 6개의 극한 가뭄 시나리오 (RCP 4.5, 8.5 CMCC-CM, INM-CM4, IPSL-CM5A-MR)를 선정하였으며, 선정된 시나리오를 모형에 적용하여 가뭄 사상을 반영한 보령댐의 미래 내한능력을 평가하였다. 내한능력평가 및 분석 기간은 Historical(1980~1999; 1990s), Present(2000~2019; 2010s), 그리고 미래 기간 (2020~2039; 2030s, 2040~2059; 2050s, 2060~2079; 2070s, 2080~2099; 2090s)으로 나누었으며, 취약성(Reliability), 회복성(Resilience), 위험성(Vulnerability), 세 가지 지표로 내한능력 평가를 수행하였다. 평가 결과, 미래 취약성은 2050s IPSL-CM5A-MR 시나리오에서 0.803까지 감소하였으며, 회복성과 위험성은 2070s IPSL-CM5A-MR 시나리오에서 0.003, 3,567.6 × 10⁶㎥까지 감소하였다.

• Applied Microscopy
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• v.3 no.1
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• pp.23-28
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• 1973

The changes of rough surfaced endoplasmic reticulum of plasma cells in the regional lymph node after injection of Bovine Gamma Globulin summarized as follow: The rough ER of plasma cells before antigenic stimulation shows flattened sac but changed to vesicular at 3rd day and vacuolar at 7th to 10th day. lntradisternal granules are appeared within the lumina or rough ER at 7th to 10th day. The rough ER is changed to distended sac or flattened sac at 20th day. The results suggest that normally flattened sac of rough ER is changed to vesicular and then to vacuolar after antigenic stimulation. But they are returned to distended sac or flattened sac with disappearance of antigenic stimuli.

• Proceedings of the Korea Water Resources Association Conference
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• 2023.05a
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• pp.43-43
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• 2023

최근 기후변화로 인해 강수량 및 강우패턴이 변화하고 있으며, 기록적인 가뭄이나 홍수와 같은 극한사상의 발생빈도가 점차 증가하고 있다. 국외의 경우 2000년부터 2021년까지 미국 서부 지역에서 극한 가뭄사상이 발생하였으며, 호주에서는 2017년부터 2019년까지 호주 남동부와 뉴사우스웨일스 지역에 극심한 가뭄이 나타났다. 국내의 경우 2000년대에 들어서 가뭄이 국지적으로 빈번하게 발생하고 있으며, 2022년부터 20023년까지 전라남도 지역에 극심한 가뭄이 발생하였다. CMIP6(Climate Model Intercomparison Project Phase 6)는 기후변화에 관한 정부간 협의체(Intergovernmental Panel on Climate Change, IPCC) 6차 평가보고서 (Sixth Assessment Report, AR6)에서 기후 모델 간의 비교와 평가를 위해 설립된 국제 협업 프로젝트로 기후변화를 예측하기 위해 다양한 기후 모델을 사용하여 미래의 기후 시나리오를 제시하였다. SSP (Shared Socioeconomic Pathways) 시나리오는 CMIP6에서 사용되는 미래 사회경제적 발전 경로를 나타내며, 기후변화의 다양한 미래 상황을 평가 및 기후영향을 분석할 수 있다. 국내 논 용수는 주로 저수지와 같은 수리시설물을 통해 공급되는 반면, 밭 용수의 경우 수리시설물로부터 용수를 공급받는 관개전은 일부에 불과하고 대부분의 밭의 경우 용수공급을 강우에 의존하여 가뭄에 더욱 취약한 실정이다. 본 연구에서는 CMIP5 기후모델 기반 RCP (Representative Concentration Pathways) 시나리오 및 CMIP6 기후모델 기반 SSP 시나리오를 적용하여 미래 기후 데이터를 비교하고자 한다. 또한, 미래 기후변화 시나리오를 토양수분모형을 적용하여 미래 밭가뭄을 전망하고자 한다.

• Journal of Popular Narrative
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• v.26 no.2
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• pp.39-85
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• 2020

This paper examines the aspects of disaster narrative, which makes the most of the concept of 'masterplot' as a narrative simulation to solve problems. By analyzing and comparing the remnants of 'masterplots' operating in the disaster narratives of Korea, the United States, and Japan, the differences between each country and social community problem recognition and resolution will be discussed. Disaster narrative is the most suitable genre for applying the 'masterplot' toward community problem solving in today's global risk society, and the problem-solving method has cognitive differences for each community. First, in the case of American disaster narratives, civilian experts' response to natural disasters tracks the changes of heroes in today's 'Marvel Comic Universe' (MCU). Compared to the past, the close relationship between heroism and nationalism has been reduced, but the state remains functional even if it is bolstered by the heroes' voluntary cooperation and reflection ability. On the other hand, in Korea's disaster narratives, the disappearance of the country and paralysis of the function are foregrounded. In order to fill the void, a new family narrative occurs, consisting of a righteous army or people abandoned by the state. Korea's disaster narratives are sensitive to changes after the disaster, and the nation's recovery never returns to normal after the disaster. Finally, Japan's disaster narratives are defensive and neurotic. A fully state-led bureaucratic system depicts an obsessive nationalism that seeks to control all disasters, or even counteracts anti-heroic individuals who reject voluntary sacrifices and even abandon disaster conditions This paper was able to diagnose the impact and value of a 'masterplot' today by comparing a series of 'masterplots' and their variations and uses. In a time when the understanding and utilization of 'masterplots' are becoming more and more important in today's world where Over-the top(OTT) services are being provided worldwide, this paper attempt could be a fragmentary model for the distribution and sharing of global stories.

• The Sea:JOURNAL OF THE KOREAN SOCIETY OF OCEANOGRAPHY
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• v.5 no.4
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• pp.295-304
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• 2000

Vertical measurement of CTDT at about 30 min intervals and spatial surface temperature, salinity, and concentration of suspended particulate matters were conducted to elucidate the character of water column and the dispersal pattern in a floating ice-dominated fjord, Marian Cove, West Antarctica. Marian Cove showed two distinct water layers in terms of turbidity; 1) cold, fresh, and turbid surface plume in the upper 2 m,2) warm, saline, and relatively clean Maxwell Bay inflow between 15-45 m in water depth. Thermal melting of Maxwell Bay inflow and tidewater glacier/floating ices developed the surface mixed layer and the activity of floating ices cause Maxwell Bay inflow to be unstable. Due to the unstable water column, the development of Maxwell Bay inflow and subsequent surface plume are not influenced by tidal frequency. Coastal current generated by strong northwesterly wind may extend warm, saline, and turbid surface plume into the central part of the cove along the northern coast via the western coast of Weaver Peninsula. Terrigenous sediments of meltwaters from the glaciated ice cliffs near the corner of tidewater glacier and some coasts enter into the cove and their dispersion depends upon the hydrographic regimes (tide, wind, wave etc.). At the period of spring tide, the strong wind stress with the northwesterly wind direction reserve suspended sediment-fed surface plume and so allow the possibility of deposition of terrigenous sediments within the basin of cove.

• Journal of the Korean Geotechnical Society
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• v.16 no.1
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• pp.145-155
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• 2000

Orientation data of discontinuities are of paramount importance for rock slope stability studies because they control the possibility of unstable conditions or excessive deformation. Most orientation data are collected by using linear sampling techniques, such as borehole fracture mapping and the detailed scanline method (outcrop mapping). However, these data, acquired by the above linear sampling techniques, are subjected to bias, owing to the orientation of the sampling line. Even though a weighting factor is applied to orientation data in order to reduce this bias, the bias will not be significantly reduced when certain sampling orientations are involved. That is, if the linear sampling orientation nearly parallels the discontinuity orientation, most discontinuities orientation data which are parallel to sampling line will be excluded from the survey result. This phenomenon can cause serious misinterpretation of discontinuity orientation data because critical information is omitted. In the case study, orientation data collected by using the borehole fracture mapping method (vertical scanline) were compared to those based on orientation data from the detailed scanline method (horizontal scanline). Differences in results for the two procedures revealed a concern that a representative orientation of discontinuities was not accomplished. Equal-area, polar stereo nets were used to determine the distribution of dip angles and to compare the data distribution fur the borehole method versus those for the scanline method.

• Economic and Environmental Geology
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• v.15 no.1
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• pp.41-47
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• 1982

Typical stratigraphic sequences of Paleozoic form the Baegunsan Syncline (equal to Hambaeg Syncline) and Taebaegsan Group is the basement in the southern part of Kangweon Province. Deformation pattern depends on their stratigraphic site and their internal properties. In the biotite schists and meta-sandstones of Pre-Cambrian sequences, flow folds and ptygmatic folds are developed, and high strain deformation is pervasive. Deformational patterns of Cambro-Ordovician are variable because of their various formations. Fracturing is pervasive in the Jangsan Quartzite and Daegi and Maggol Limestone. Welldeveloped slaty cleavage and angular folds of kink and chevron types are the prevailing structures of pelitic rocks. The most characteristic feature of limestone alternated with argillite is the "Compositional cleavage (Author's proposal)" known as the "Worm-eatern" structures. It was known that this structures have a sedimentary origin. But their preferred orienation of long axis of erosional lime holes, originated from tectonic deformation of folding. And this structures have the same character as the axial plane cleavages. Fracturing and long wave concentric folds are dominant characters of the Upper Paleozic sequences. In this area, two folds are superimposed. Field studying and analysis of structures show that the cross-folds of NS-direction are pervasive and were deformed by the EW-directional Baegunsan Syncline. The cross-folding is the major and penetrative deformation and prior to Baegunsan Syncline.

• Korean Journal of Soil Science and Fertilizer
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• v.8 no.3
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• pp.121-133
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• 1975

Soils of the agricultural land derived mostly from volcanic ash in Jeju island may be characterized by relatively high PH, high contents of organic matter and exchangeable bases, and significantly low content of available phosphorus. The PH, organic matter, and available phosphorus of the soils in northern Jeju are 6.1, 12.6%, and 23 ppm, while those of the soils in the southern Jeju are 6.4, 3.7 %, and 76 ppm respectively. Upland soils in Jeju may be classified into 4 groups on the basis of soil fertility: black soil, very dark brown soil, dark brown, and red yellow soil. The organic matter content of black soil, very dark soil and dark brown soil is 15%, 7%, and 3% respectively. The soils of high organic matter content show the high phosphorus absorption coefficient, low content of available phosphorus, and low degree of the base saturation. The soil productivity for barley in the northern Jeju is higher than that in the southern Jeju and the productivity in the western Jeju is higher than that in the eastern part. The productivity for barley is in decreasing order of dark brown soil, very dark brown soil and black soil. Yields of potato and sweet potato in Jeju are higher than in the mainland. Those crops are considered to be tolerant to aluminumtoxicity. The response of sweet potato to nitrogen, phosphorus, and potassium in Jeju soils is lower than that in the mainland, while the response of barley and rape to nitrogen and phosphorus is higher than that in the mainland. The response to fertilizer applied is greater in the northern Jeju than in the southern Jeju. Lime requirement for the Jeju soils calculated on the basis of laboratory tests is so tremendous that single application of lime required might induce adverse effect. Most of the phosphorus applied to the Jeju soils is readily fixed as unavailable form and application of phosphorus in the level of 30 to 40 kg/10a is thought to give little effect.