담양지역 영산강 지류 하천 퇴적층의 특성에 대한 연구

김종연 ( Jong Yeon Kim ),홍세선 ( Se Sun Hong ) 한국지형학회 2013 한국지형학회지 Vol.20 No.4

The characteristics of deposits formed by the Daejon-cheon and Soobuk-cheon, dissecting the mountains such as Byungpung Mt. and Samin Mt. in western part of Damyang county, Jeonmam province. Results from field survey and bore hole logging by KIGAM are used in interpreting depositional environment, in this study. By the result of deposits near of the channels Daejon-cheon and Soobukcheon, and main channel of Youngsan River, the depth of sediment layers in this area is 4~7m, far thinner than formerly estimated. Weathered material of local rocks forms the base of the sedimentary layers. It can be assumed that the location channel of the Youngsan river has been stable ever since the start of the sedimentary events. Sediment particles of tributaries are angular than those of Youngsan River. Particles are larger and sorting is poor. It is interpreted as mount flash flood deposits. Main sources of sediments at the valley bottom or deposition dominated area are the terrace deposits or slope deposits over the gentle foot-slope or front of surrounding mountains. Some particles show polygonal cracking on the surface originated from the strong chemical weathering, while most of these has high angularity. It means various geomorphic processes operate to produce and transport the particles in this area.Isolated hills within the sedimentary plains are made with weathered materials of local bedrock. In the case of foot-slope of the hills, thin sedimentary layers are found. So it can be concluded that surface features of deposition zone of the Daejon-cheon and Soobuk-cheon is formed by the filling of lower part of the valley and its feature partly controlled by the relief of the weathering front.

오대천 수항 계곡의 산지 하천성 퇴적층 특성에 대한 연구

김종연 ( Jong Yeon Kim ),이상헌 ( Sang Heon Yi ),김종욱 ( Jong Wook Kim ) 한국지리학회 2012 한국지리학회지 Vol.1 No.1

The sediment particles found from depositional landforms at Suhangri, Hajinbu, Gangwon province were analyzed in this study. The samples were collected from the depositional forms located near of Odaecheon. Odaecheon is deeply dissecting the paleozoic sedimentary rocks (mainly sandstone) and formed fluvial terraces along its course. The sediment particles of depositional landforms showed different origin and transport route. The lower terraces near of current channel are formed with well rounded granite gravels while higher depositional forms at the foot of the slope are formed with sub angular - sub rounded sandstone gravels with clay matrix. In addition, the thickness of the landforms found less than 10m. So it should be pointed that overall feature of the landform is not decided by the depositional processes of stream but the surface feature formed by erosional processes. It is also found from the slope of the mountain that the gullies on the slope are the main erosional and depositional agents. The sediment particles formed by mechanical weathering or deposited by other processes are transported through the gully. The particles found from the bottom of the gully showed similar roundness and lithology with depositional forms at footslope. It means that sediment particles at the area transported from upslope by the gullying rather than upstream by the fluvial processes. So, it should be mentioned that the depositional forms at this area have different sediment link with slope or upstream reaches, though relative height form the channel is similar.

충청북도의 하천 지형 연구에 대한 고찰

김종연 ( Jong Yeon Kim ) 한국지리학회 2016 한국지리학회지 Vol.5 No.1

Previous studies on fluvial landforms in Chungcheongbukdo (Province) are reviewed in this study. Various micro-forms, like pothole and grooves, are found from channel bed of mountain streams incising granite area of Sobaek mountain range. However only the forms at Hwayang valley area were studied. Fluvial terraces can be found from the Danyang area, mid reach of the Nanhangang (River). Lower terrace of this area are regarded as fill terrace, while upper terraces are weathered strath terrace. There are some proposed hypothesis on the age and forming processes of terraces, but further scientific analysis on the chemical composition of weathered sediment and burial ages are needed. Number of abandoned channels are formed by meander cut along the head and mid reach of Dalchen (River), a tributary of Namhangang. Information on the burial age of the sediment can contribute to the studies on the landform change of Sobaek mountain range. Abandoned palaeo-channel and terraces can be found from the Chogangcheon (River) in Yeongdonggun, southern part of Chungcheonbukdo. There are previous studies on fluvial terraces along the Mihocheon (River), the forming age and processes of terrace are reported recently.

미호천 퇴적층의 매몰연대에 대한 연구: 정북동 토성과 범람원의 물질을 대상으로

김종연 ( Jong Yeon Kim ),성정용 ( Jeong Yong Seong ) 한국지리학회 2016 한국지리학회지 Vol.5 No.2

Depositional environment changes of drainage basin of Geum River during Pleistocene and Holocene have been studied by some researchers. Previous studies classified fluvial terraces along the channel of Miho river by the relative height from the current river channel. The lower terraces of this area supposed to be formed after the last glacial maximum. However, the burial age of fluvial sediments of Miho river have not estimated using numerical method. Samples for age estimation were collected from the Jeongbuk earth wall and adjacent area. The Jeongbuk earth wall is supposed to be constructed on the natural levee of Miho river. Sand layer forms the basis of fluvial depositional layers of the study area. The fluvial gravel layer, can be found from the channel bed, overlain the basal sand layer and are covered by upper sand and finer particle layer. The burial age of upper sand layer and finer particle layer are estimated as 13.65±2.04ka BP and 4ka BP respectively. At the south-east part of the wall three burial ages are estimated from samples of the lowest part (sand; 9ka), middle part (finer particles; 6ka) and the upper part (sandy: 9ka). The soil wedges are found from clay layer at the bottom of south part of the wall and adjacent floodplain area. The burial age of these layer estimated as 17~12ka BP and it is the time global warming after the last glacial maximum. It was reported that precipitation of that period also increased.

양구 두타연 인근 지역의 기반암 하상지형 연구

김종연 ( Jong Yeon Kim ),김창환 ( Chang Hwan Kim ) 한국지형학회 2012 한국지형학회지 Vol.19 No.2

Satae cheon, a tributary of the Suip cheon in Yanggu, Gangwon province, is an international river extended to North Korea. Most of drainage basin area of the river was the fierce battle field during the Korean War (1950-1953) and hard to access as it located between the MDL (Military Demarcation Line) and the CCZ (Civilian Control Zone: about 10km south from MDL), By the restriction of access to the sites, most of natural landscape have been well conserved except limited use for military activities, Even the landfoms in that area were not studied, except the government`s heritage reports, Satae Cheon`s channel follows the Imdang fault line(N-S) to Satae-ri and flow to west to the Dutayeon area, The river meanders along geological structure or weak line at the Dutayeon area, The meandering channel was shorten by the meander cut which linked the thalweg line of meander loop ant the meander neck. As a result of this cut, the river cliff formed by the Satae cheon became the part of newly formed channel bed and the S-forms are formed. After the channel route stabilized, channel incised the rock with large potholes and undulating walls were formed. The channel width changes from 1m to 10m with restriction of the undulating walls, so this part can be regarded as inner channel or inner gorge. From the point of planar forms it also can be slot-type canyon.

UWB TWR 기반 삼변 측위 알고리즘에 관한 연구

김종연(Kim Jong Yeon),성상모(Sung Sang Mo),정재일(Jung Jae Il) 한국통신학회 2023 한국통신학회 학술대회논문집 Vol.2023 No.2

전동식 조향장치의 토크&조향각 센서 고정구조 최적화에 대한 연구

김종연(Jong-Yeon Kim),구상훈(SANG-HOON KU) 대한전자공학회 2025 대한전자공학회 학술대회 Vol.2025 No.6

강원도 고성 일대의 지형 경관에 대한 연구

김종연 ( Jong Yeon Kim ) 한국지형학회 2011 한국지형학회지 Vol.18 No.3

The landforms based on granite and basalt in Gosung, Gangwon province were analysed. Some part of this area experienced volcanic activities while most of the area was experiencing erosion of weathered mantle(saprolites) of mesoic granites during cenozoic period. Two different lithologies affect the mode of landscape evolution. The basalt covers the mountain tops as a ``cap rock`` with flat surfaces. It shows relatively fresh rock surface with cliff or steep slops at the boundary with weathered granite. The blocks detached from the cliff accumulated at the foot of the cliff(talus) or moved and filled the valley(block streams). These debris slopes cover the deeply weathered granites. In the case of Oeum Mt. and Duibaekjae, the number of point of origin of the basalt flow is not clear. The orientation of blocks from block stream coincides with slope aspects and it can be assumed that the bolcks were moved by solifluction. The landscape change of the block streams are dominated by removal of weathered material from beneath of the valley rather than removal of bedrock blocks themselves.

한국의 기반암 하상 침식 지형 연구

김종연 ( Jong Yeon Kim ) 한국지형학회 2011 한국지형학회지 Vol.18 No.4

Minor erosional forms in the bedrock river, like potholes, are not just research subject for the professional geomorphologis. In addition, these features attract general public and make them understand the social contribution and importance of geomorphologic research activities. In this paper, the studies on bedrock minor forms in Korea was reviewed. For further researches, some of major erosional processes and minor forms in bedrock rivers were discussed in detail. Cavitation, plucking, hydro-wedging, and abrasion by passing sediment particles are the major processes to create the longitudinal or transverse minor forms like pothole, furrows, flutes, and runnels. Especially the definition of furrows and runnels are explained to prevent the confusion with pothole, weathering pits and grooves. To make a progress in research on bedrock minor forms the quantitative relationship between the variables should be studied. New techniques for scientific estimation of erosion rates and exposure ages of bedrock surfaces should be used in this field.

서해연안 조간대에 서식하는 두줄망둑(Tridentiger trigonocephalus) 자치어의 먹이생물

김종연(Jong-Yeon KIM),윤종만(Jong-Man YOON) 한국수산해양교육학회 2016 수산해양교육연구 Vol.28 No.1

To investigate the feeding habits of Tridentiger trigonocephalus juveniles captured in the intertidal zone of Dodun-ri, Seocheon-gun from the end of May to early June 2012, the gut contents were observed. Feeding incidence of the juveniles increased twice a day, first in the morning and second in the afternoon. The major food organisms of the juveniles (6.5〜10.0 ㎜ NL) were composed of copepods (65.4%), amphipods (2.0%), shrimp larvae (14.5%), polychaete larvae (22.6%), and etc. These food items held more than 2 percentage in the dry weight of the total food items.