• Economic and Environmental Geology
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• v.42 no.6
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• pp.627-634
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• 2009

Redefining the difference among the Yamaguchi's 'so-called Yeoncheon system,' north Korean's 'Rimjin System' and Yeoncheon Group of national geological map, authors tried to avoid a possible misunderstanding of concept between Yeoncheon Group and Imjingang fold Belt. As a tool of preliminary geological mapping and or N-S reconnaissance of the whole Yeoncheon Group, an interpretation technique of satellite image from various angles has been applied to understand the geometrical attitude of strike and dip of random spot, and a further concept like as cross section.

• Proceedings of the Korea Water Resources Association Conference
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• 2007.05a
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• pp.1757-1761
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• 2007

이 연구는 1999년 7월 31일부터 8월 3일까지 경기도 북부지방의 임진강 전유역에 걸쳐 내린 집중호우로 발생한 연천댐 일부 유실에 따른 사고에 대해 댐파괴를 모의하였다. 댐지점의 홍수량 분석은 HEC-HMS모형을 사용하여 한탄강 유역을 15개의 소유역으로 분할하여 분석하였고 댐유출량 산정은 FLDWAV모형의 DAMBRK모듈을 사용해 모의하였다. 댐파괴 홍수량에 의해 발생되어지는 홍수파 해석은 HEC-RAS모형을 구축하여 모의하였다. HEC-RAS모형의 검증은 1999년 7월 31일부터 8월 2일 까지 한탄강수계 내 전곡수위표에서 관측된 관측수위와 비교하여 검증하였다. 연구분석은 댐이 없는 자연상태(Case1)와 댐이 있는 경우 (Case2) 그리고 댐파괴된 경우(Case3) 세가지로 구분하여 분석하였다. 연구결과 연천댐 지점의 첨두 홍수량은 Case1의 경우 $10,324m^3/sec$, Case2의 경우 $10,117m^3/sec$, Case3의 경우 $11,485m^3/sec$로 모의 되었고 이때의 관측수위는 각각 EL.43.59m, EL.43.38m, EL.44.03m였다. 댐이 있는 경우와 댐파괴된 경우를 비교 하였을때 첨두 홍수량은 $1368m^3/sec$증가하였고 수위상승은 0.65m였다. 댐이 없는 자연상태와 댐파괴된 경우를 비교 하였을땐 첨두 홍수량은 $1161m^3/sec$증가하였고 수위상승은 0.65m였다.

• The Journal of Engineering Geology
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• v.33 no.2
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• pp.241-256
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• 2023

Long-term droughts and frequent spring droughts are causing damage to crops, which are the means of livelihood of residents of the Yeoncheon region. To analyze the degree of drought in Yeoncheon, the ratio of monthly precipitation and discharge was reviewed through observed data, and the standardized precipitation index and streamflow drought index were calculated. As a result of drought analysis using precipitation and discharge observation stations near the Yeoncheon basin, it was analyzed that the drought that occurred in 2014 was common to all drought indices and that drought occurred continuously until 2019, either large or small. In the case of drought indices with a duration of 12 months, it is expected that the damage caused by the drought would be severe as the drought period lasted 24 months. In order to manage drought damage, it is important to understand and predict the current state of drought. In order to cope with drought in advance, it is urgent to implement an integrated operation management strategy for rivers and waterworks structures according to the degree and duration of drought.

• The Journal of the Petrological Society of Korea
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• v.4 no.1
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• pp.1-19
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• 1995

In order to characterize the petrogenesis of the E-W trending Imjinganag belt, we studied the metamorphic rocks of the Yeoncheon Group near its type locality, Yeoncheon - Cheongok area, belonging to the southern part of this fold-thrust belt. The Samgot Formation of the Yeoncheon Group consists of calc-silicate and metapsammitic rocks together with amphibolite and amphibole gneiss. Layers of these metamorphic rocks concordantly occur in a wide area with its length greater than 15 km along their strike direction. Major mineral assemblages of the amphibolite are hornblende + plagioclase ${\pm}$ garnet ${\pm}$ diopside ${\pm}$ biotite ${\pm}$ quartz. Accessory rutile and ilmenite are characteristically replaced by titanite. Metamorphic temperatures and pressures estimated from the garnet - hornblende - plagioclase - quartz geothermo-barometers are 632-$736^{\circ}C$ and 7.9-11.1 kbar, respectively. Thus, the regional metamorphism of the study area belongs to the upper amphibolite facies. Furthermore, Sm-Nd and Rb-Sr data of garnet, plagioclase, and whole rock of an amphibolite define mineral isochrons of $231{\pm}30$ Ma and $222{\pm}24$ Ma, respectively, suggesting the Triassic metamorphism. These results are consistent with P-T conditions and metamorphic ages reported in the Shandong Peninsula, and support the hypothesis that the Chinese collision belt may extend into the Imjingang belt in the Korean Peninsula.

• KOREAN POULTRY JOURNAL
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• v.43 no.10
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• pp.140-143
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• 2011

경기도 연천의 대표적인 산란계 농장인 안일농장(대표 안영기)은 연천군 내 산란계 사육수수의 50%를 차지하는 지역 선도농가로 알려져 있다. 전체 9만2,562$m^2$(2만8,000여 평)의 농장부지 중 연면적 5만6,198$m^2$(1만7,000여 평)에 육성사 2동, 성계사 10동, 자체 집하장과 액란가공공장을 갖추고 있는 안일농장은 산란계 25만수와 육성계 5만수 등 총 30만수를 사육하고 있으며 하루 12만개의 계란을 생산하고 있다.

• Korean Architects
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• no.4 s.384
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• pp.74-77
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• 2001

• The Hankook-Saengyark Bo
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• no.183
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• pp.4.1-4.1
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• 1994

• KOREAN POULTRY JOURNAL
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• v.9 no.3 s.89
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• pp.100-102
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• 1977

• 월간낙농육우
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• v.31 no.7
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• pp.164-169
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• 2011

• Water for future
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• v.29 no.4
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• pp.58-67
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• 1996