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JOURNAL OF THE GEOMORPHOLOGICAL ASSOCIATION OF KOREA

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수록정보
수록범위 : 1권1호(1994)~26권2호(2019) |수록논문 수 : 742
한국지형학회지
26권2호(2019년 06월) 수록논문
최근 권호 논문
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KCI등재

1공간통합 모델을 적용한 암괴류 및 애추 지형 분포가능지 추출

저자 : 이성호 ( Lee Seong-ho ) , 장동호 ( Jang Dong-ho )

발행기관 : 한국지형학회 간행물 : 한국지형학회지 26권 2호 발행 연도 : 2019 페이지 : pp. 1-14 (14 pages)

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This study analyzed the relativity between block stream and talus distributions by employing a likelihood ratio approach. Possible distribution sites for each debris slope landform were extracted by applying a spatial integration model, in which we combined fuzzy set model, Bayesian predictive model, and logistic regression model. Moreover, to verify model performance, a success rate curve was prepared by crossvalidation. The results showed that elevation, slope, curvature, topographic wetness index, geology, soil drainage, and soil depth were closely related to the debris slope landform sites. In addition, all spatial integration models displayed an accuracy of over 90%. The accuracy of the distribution potential area map of the block stream was highest in the logistic regression model (93.79%). Eventually, the accuracy of the distribution potential area map of the talus was also highest in the logistic regression model (97.02%). We expect that the present results will provide essential data and propose methodologies to improve the performance of efficient and systematic micro-landform studies. Moreover, our research will potentially help to enhance field research and topographic resource management.

KCI등재

2Weibull 함수를 이용한 입도 분리와 하안단구 퇴적층의 기원

저자 : 박충선 ( Chung-sun Park ) , 조영동 ( Young-dong Cho ) , 이광률 ( Gwang-ryul Lee )

발행기관 : 한국지형학회 간행물 : 한국지형학회지 26권 2호 발행 연도 : 2019 페이지 : pp. 15-27 (13 pages)

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This study tries to reveal transport mechanism and origin of components from fluvial terrace deposits in Danyang and Geum River basins, through grain size partitioning using the Weibull function. Grain size parameters suggest that the samples analyzed in this study can be grouped into the coarse, fine and medium samples. The coarse samples are partitioned into three or four components. More than 65% of the coarse samples consist of components by suspension and saltation by fluvial process, while components by attachment to coarse grains or aggregates and/or by individual grains deposited under non-flow condition are also found in the coarse samples. The fine samples consist of four components and components found in loess deposits in Korea occupy >70%, suggestive of the same transport mechanisms (westerlies and winter monsoon) and common source areas with loess deposits in Korea. However, components by aeolian process from local sources as well as by fluvial process are also found in the fine samples. The medium samples are partitioned into components with similar sizes to the coarse and fine samples, respectively.

KCI등재

3강원도 삼척시 근덕면 궁촌항 방파제 확장 전, 후의 해안선 변화

저자 : 김영재 ( Kim Young-jae ) , 황상일 ( Hwang Sangill ) , 윤순옥 ( Yoon Soon-ock )

발행기관 : 한국지형학회 간행물 : 한국지형학회지 26권 2호 발행 연도 : 2019 페이지 : pp. 29-38 (10 pages)

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This study tries to reveal influence of artificial structure construction on shoreline change using DSAS 4.3. Before breakwater extension at the Gungchon Port, beaches at the study area were dominated by long-term erosion and especially, severe shoreline retreat was prevailed at the Wonpyeong Beach that is opened to offshore. During 2 years after the extension leading formation of shadow zone, the Gungchon Beach was rapidly developed due to sand supply to the shadow zone and then stabilized. The shadow zone only affected the northern part of the Wonpyeong Beach, while beaches from the southern part of the Wonpyeong Beach to the Munam Beach was little affected. Beach nourishment and groin construction led beach development at the northern part of the Wonpyeong Beach, while beach erosion from the southern part of the Wonypeong Beach to the Munam Beach was caused by the groin. This study suggests that sufficient consideration before coastal structure construction should be made regardless of purposes.

KCI등재

4화성 연안의 중세온난기 이후 해수면 변동에 연동된 침식·퇴적 흔적 연구

저자 : 양동윤 ( Yang Dong-yoon ) , 한민 ( Han Min ) , 김진철 ( Kim Jin Cheul ) , 박수정 ( Park Sujeong ) , 임재수 ( Lim Jaesoo )

발행기관 : 한국지형학회 간행물 : 한국지형학회지 26권 2호 발행 연도 : 2019 페이지 : pp. 39-54 (16 pages)

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In this paper, based on evidence of coastal sediment, we show that erosion and sedimentation environments are very sensitive to sea level changes during the Medieval Warm Period (MWP) and the Little Ice Age (LIA). We identified four sedimentary units(4.57-3.07m), which formed in the Dark Age Cool Period (DACP), MWP and LIA were classified based on the lithostratigraphy, grain size distribution, magnetic susceptibility and geochemistry of a drilling core taken from the west coast of Hwaseong City. The unconformity surfaces as boundaries of the units were also identified by the lithostratigraphy shown on the drilling core. We propoese that sedimentation was dominant in the area during the periods of sea level rise, whereas erosion prevailed during the periods of sea level fall. Particularly, extreme events, such as floods and typhoons are believed to have accelerated these processes, and we found the associated evidence in sediments of two units. This study provides an example of estimating the relative sea level variation using coastal sediments and may be useful for studying past sea level changes around the Korean Peninsula.

KCI등재

5한반도 남부 해안의 융기율 비교

저자 : 이광률 ( Lee Gwang-ryul ) , 박충선 ( Park Chung-sun )

발행기관 : 한국지형학회 간행물 : 한국지형학회지 26권 2호 발행 연도 : 2019 페이지 : pp. 55-67 (13 pages)

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This study tries to reveal and compare uplift rates in the southern coast of the Korean Peninsula, based on absolute ages from coastal terrace on the coast. The uplift rate in the East Coast from previous study ranges from 0.258 to 0.357 m/ka with a median rate of 0.262 m/ka and shows an increase trend from north to south. Median uplift rate of 0.082 m/ka with minimum and maximum rates of 0.053 m/ka and 0.127 m/ka, respectively, is calculated in the South Coast from previous and this studies. The uplift rate in the West Coast from 3 absolute ages in this study is 0.082~0.112 m/ka with a median rate of 0.090 m/ka. Based on these uplift rates in the southern coast of the Korean Peninsula, it can be concluded that since MIS 5, the East Coast has experienced 3 to 4 times faster uplift rate than the West and South Coasts. However, this study suggests that more discussion on whether these uplift rates are long-term tectonic movement associated with tilted warping movement since the Tertiary or short-term tectonic movement associated with isostatic rebound due to sea level change since the Last Interglacial is needed.

KCI등재

6가음단층계의 선형구조 추출과 선형구조와 단층활동의 관련성

저자 : 오정식 ( Oh Jeong-sik )

발행기관 : 한국지형학회 간행물 : 한국지형학회지 26권 2호 발행 연도 : 2019 페이지 : pp. 69-84 (16 pages)

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The purpose of this study is to extract lineaments in the southeastern part of the Gaeum Fault System, and to understand their characteristics and a relationship between them and fault activation. The lineaments were extracted using a multi-layered analysis based on a digital elevation model (5 m resolution), aerial photos, and satellite images. First-grade lineaments inferred as an high-activity along them were classified based on the displacement of the Quaternary deposits and the distribution of fault-related landforms. The results of classifying the first-grade lineaments were verified by fieldwork and electrical resistivity survey. In the study area of 510 ㎢, a total of 222 lineaments was identified, and their total length was 333.4 km. Six grade lineaments were identified, and their total length was 11.2 km. The lineaments showed high-density distribution in the region along the Geumcheon, Gaeum, Ubo fault, and a boundary of the Hwasan cauldron consisting the Gaeum Fault System. They generally have WNW-ESE trend, which is the same direction with the strike of Gaeum Fault System. Electrical resistivity survey was conducted on eight survey lines crossing the first-grade lineament. A low-resistivity zone, which is assumed to be a fault damage zone, has been identified across almost all survey lines (except for only one survey line). The visual (naked eyes) detecting of the lineament was evaluated to be less objectivity than the automatic extraction using the algorithm. However, the results of electrical resistivity survey showed that first-grade lineament extracted by visual detecting was 83% reliable for inferred fault detection. These results showed that objective visual detection results can be derived from multi-layered analysis based on tectonic geomorphology.

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1연안해역에서 석유오염물질의 세균학적 분해에 관한 연구

(2006)홍길동 외 1명심리학41회 피인용

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