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양구해안분지에서 기존 농업용수 이용량 산정식에 따른 양수량과 실측 양수량 비교
유한선,전우현,권기덕,이진용,Ryu, Han-Sun,Jeon, Woo-Hyun,Kwon, Kideok,Lee, Jin-Yong 한국지하수토양환경학회 2017 지하수토양환경 Vol.22 No.4
Efficient groundwater management requires accurate information about the water volume used. The pumped volume of groundwater can be indirectly estimated using empirical formulae based on electric power consumption. The purpose of this study is to test the accuracy of this indirect method. The Haean basin in Gangwon is located in a rural area, where majority of the groundwater extracted is used for irrigation. The pumped volume of groundwater indirectly estimated from electricity usage using these empirical formulae was compared with the actual pumped volume determined by conducting experiments on April 29 and May 19, 2017. The field survey collected data on electricity usage, pumped volume, and groundwater levels. Based on this measured data, correlations were calculated between electricity usage and pumping volume, as well as groundwater level and pumping rate. The results show that electricity usage and pumped volume measured for both wells (YHE1 and YHE2) are highly correlated (r=0.99, p<0.001). However, for YHE1, notably, the correlation between the groundwater level and pumping rate was not significant, and only some correlations were identified for these variables for the YHE2 test well. The average error with respect to the estimation of the actual pumped volume from the existing formula (1) and formulae (2) and (3) are +399% and -88%, respectively. To reduce these errors, these formulae need to consider other factors affecting the pumped volume.
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영조 4년 戊申亂과 전라도 의병 -『湖南節義錄』분석을 중심으로-
유한선 전북사학회 2011 전북사학 Vol.0 No.39
The Mooshin Revolt which broke out in 1728, the fourth year of King Yeongjo's reign, was triggered by Namin, Soron, and a radical faction combined with local aristocrats called Yangban in an attempt to dethrone King Yeongjo and change the political conditions led by Noron. As it constituted a sort of nationwide civil war waged by those who were excluded from leadership roles in the government, its development and features were different according to area. Besides, records of the Mooshin Revolt are different according to the recorder's political position. Therefore, a study on the Mooshin Revolt requires exploring local history based on an area where a militia group was created and discovering and using new materials. Especially Jeolla-do is an important area for research on the Mooshin Revolt because it was the area where the leading figures of the revolt aggressively worked. However, few studies have been conducted on the Mooshin Revolt in the area. In order to find out the features of the Mooshin Revolt by area, this study analyzed “Mooshinuijeok” out of Honamjeoluirok(湖南節義錄), the historical material of Jeolla-do, examining the features of the Mooshin Revolt in Jeolla-do and activities of loyal troops from Jeolla-do. The Mooshin Revolt in Jeolla-do showed the following two features. First, Jeolla-do was the area where a plan for a revolt was specifically realized even before the Mooshin Revolt. Park Pil-mong, Sim Yu-hyeon and Park Pil-hyeon, the leading figures of the revolt, had established a plan and human network for a nationwide revolt when King Yeongjo ascended to the throne. After they moved into Jeolla-do, as preparatory works, anonymous letters arguing for the removal of King Yeongjo from the throne circulated, gunpowder was stolen to blow up the gate of the castle and to kill the king, and parts of military, including band of thieves of Byeonsan and slaves, had already moved to Gyeonggi-do. Second feature was the governor of Taein Park Pil-hyeon's way of raising an army including official soldiers. The governor of Taein Park Pil-hyeon had colluded with Jeong Sa-hyo, the provincial governor of Jeolla-do, to mobilize their forces in Jeonju using a false claim that they would suppress rebels in Chungcheong-do. However, when a local official of Jeonju caused a communication failure among those who involved in the revolt, making the nation face a civil war-like situation, the claim of suppressing rebels turned out to be false, breaking up Park Pil-hyeon's Taein official soldiers. In Honamjeoluirok(湖南節義錄), on the other hand, according to the development of the Mooshin Revolt by period, the activities of loyal troops of Jeolla-do are recorded as follows. In the early period of the revolt, movements were made to protect Seonggyun-gwan and guard the king. As the revolt developed, loyal troops were raised all over Jeolla-do and then assembled in Namwon. At battles in Anseong and Juksan, Gyeonggi-do which became a turning point for the revolt, loyal troops from Jeolla-do performed outstanding work. During the suppression period of the revolt, along with defending Palryangchi in Namwon and advancing to Hamyang, Gyeongsang-do, suppressing and capturing remaining rebels were conducted. Loyal troops from Jeolla-do did outstanding jobs in defending Palryangchi in Namwon and advancing to Hamyang, Gyeongsang-do. Because of counterattacks from local official solders and loyal troops in Jeolla-do, the rebels withdrew to Hamyang, Gyeongsang-do, failing to advance further. On March 30th, official soldiers and loyal troops from Jeolla-do moved forward into Hamyang and executed Choi Jon-seo. Following this, Jeong Hui-rang was executed in Geochang on April 2nd, completing the suppression of the Mooshin Revolt.
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Review of Karst Research in the Republic of Korea
유한선,박상욱,이진용,김희정 한국지구과학회 2022 한국지구과학회지 Vol.43 No.4
Various types of karst topographies are found worldwide. Owing to their global distribution, karst areas havebeen extensively studied by scientists who investigate new discoveries by linking the characteristics of karst topographieswith their own research fields. However, there have been only a few studies on karsts in the Republic of Korea, and littleresearch exists on their hydrogeology. Fragmentary studies have been conducted on the hydrochemical characteristics ofgroundwater in limestone areas, the causes of high arsenic concentrations in groundwater, and the hydraulic conductivityof limestone areas. Research on hydrogeological characterization and flow mechanisms in these areas has only beganrecently. Identification and the proper management of available groundwater resources in karst (limestone) areas isessential as their unique geological characteristics render it difficult to construct reservoirs or dams at appropriate scales. We have reviewed prior work on karsts in the Republic of Korea to provide information that supports water resourcesecurity in the karst areas, to improve the understanding of the equitable use of water resources, and to identify the bestmanagement practices for groundwater resource resilience improvement.
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강원도 철원 샘통과 주변 지표수 및 지하수의 수리화학 및 미생물 군집 특성 연구
유한선,문진아,김희정 대한지질공학회 2023 지질공학 Vol.33 No.2
Hydrochemical characteristics and microbial communities of spring (Samtong), surface water, and groundwater in Cheorwon, Korea, were analyzed. Field surveys and water quality analyses were undertaken at 10 sampling points for five spring, two surface, and three groundwater samples on 15 December 2022. Hydrochemical analysis revealed that most water samples were Ca-HCO3 type and that water-rock interactions were the predominant mineral source. Radon concentrations were <1 kBq m-3 for surface water, 1~10 kBq m-3 for spring water, and 1~1,000 kq m-3 for groundwater. Microbial cluster analysis showed that the main phyla were Proteobacteria, Planctomyceta, Verrucomicrobia, Acidobacteria, and Actinomycetota.Non-metric multidimensional scaling (NMDS) analysis indicated that water temperature, pH, and Si content were closely related to microorganism content. NMDS and canonical correspondence analysis results revealed that environmental factors affecting spring water were temperature, and Mg and Si concentrations, particularly for Acidobacteria and Proteobacteria, and Pseudomonas brenneri. Both hydrochemical and microbial community analyses yielded similar results at some spring and groundwater sampling points, likely due to the effects of a basalt aquifer. 본 연구에서는 철원 샘통과 그 일대의 지하수 및 지표수의 지구화학 및 미생물 군집 특성을 분석하였다. 2022년 12월 15일 철원 샘통 5개, 지하수 3개 그리고 지표수 2개, 총 10개 지점에서 야외조사를 수행하였다. 수화학분석 결과 샘통과 지표수는 모두 Ca-HCO3 유형에 도시되었으며, 지하수 한 지점(CSG3)을제외한 나머지 지점은 모두 Na-HCO3 유형에 도시되었다. 또한 모든 지점은 같은 기상수의 기원으로 물암석 반응이 우세하게 영향을 준 것으로 보인다. 라돈 농도 분석 결과 지표수는 1,000 Bq/m3 이하, 샘통은1,000~10,000 Bq/m3 , 지하수는 1,000~1,000,000 Bq/m3 의 농도 값을 보였다. 미생물 군집 구조 분석 결과 문(phylum) 비율 중 가장 우점종은 Proteobacteria, Planctomyceta, Verrucomicrobia, Acidobacteria, Actinomycetota 순으로 나타났다. 비계량적 다차원 척도법 모델링(NMDS)에서는 수온, pH, Si가 현장의 토착미생물과 밀접한 연관성을 보였다. NMDS와 CCA 결과에서 샘통에 영향을 미치는 주요 환경적 요소는 온도, Mg, Si로 나타나며, 그 환경적인 영향과 관련된 주요 미생물은Acidobacteria와 Proteobacteria 중 Pseudomonas brenneri이다. 수화학 및 미생물 군집 분석 모두 샘통과 지하수 CSG3 지점에서 유사한 결과를 보였으며, 현무암 대수층의 영향을 받은 것으로 추정된다.
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지하수-습지-지표수 상호작용에 따른 수화학적 특성 연구
유한선(Han-Sun Ryu),김희정(Heejung Kim),문진아(Jinah Moon),Naing Aung Khant 대한지질학회 2021 대한지질학회 학술대회 Vol.2021 No.10
본 연구에서는 전 세계 하나의 종만 존재하는 희귀종 물거미가 서식하고 있는 은대리 물거미서식지 일대에서 지하수-습지-지표수 상호작용에 따른 수화학적(양이온, 음이온, 알칼리도, 산소-수소 동위원소, 라돈) 특성을 분석하였다. 현장조사 지점은 은대리 물거미서식지(습지)를 중심으로 500 m 내외에 위치하고 있는 지하수 4지점, 습지 3지점, 지표수 3지점을 선정하였다. 2021년 5월부터 8월까지 총 4회 현장조사 및 시료채취를 수행하였다. 연구지역의 지하수, 습지 그리고 지표수의 수리화학특성 분석 결과 습지와 가장 근접해 있는 심부 지하수(EDG4)를 제외한 모든 지점이 Ca-HCO₃ 유형에 도시되었으며, EDG4에 경우 Na-HCO₃ 유형에 도시되어 다른 지점과 구분되었다. 산소-수소 동위원소 분석자료는 지하수, 습지 및 지표수의 물 모두 같은 기원인 것으로 보인다. 하지만 지하수와 지표수는 비슷한 동위원소 함량(δ<SUP>18</SUP>O: -8.51~–7.11‰, δD: -57.13~-49.78‰)을 가지고 있어 함께 도시되는 것을 볼 수 있었으나, 습지의 경우 지하수와 지표수에 비해 비교적 무거운 동위원소 함량(δ<SUP>18</SUP>O: -5.88~–2.13‰, δD: -41.76~-27.13‰)을 보이며 확연히 구분된 위치에 도시 되었다. 라돈의 경우 지하수, 습지 및 지표수 모두 조사를 시작한 5월에서부터 6월, 7월 점차적으로 농도가 감소하는 경향을 보였다. 지하수에서 가장 높은 라돈 농도를 보이며, 지표수의 농도가 가장 낮게 측정 되었다. 습지는 지하수와 하천수 사이의 농도 값을 보여 습지가 지하수와 지표수 모두의 영향을 받고 있을 가능성 또한 보여준다. 은대리 물거미서식지는 우리나라 유일하게 멸종위기 물거미가 서식하고 있는 의미있는 지역으로 이 일대 지하수, 습지 그리고 지표수의 수화학적 특성 연구를 통해 물거미 서식 환경에 대한 기초적인 수리생태학적 정보를 제공할 수 있을 것으로 기대한다.
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