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JOURNAL OF THE GEOMORPHOLOGICAL ASSOCIATION OF KOREA

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수록정보
수록범위 : 1권1호(1994)~25권3호(2018) |수록논문 수 : 718
한국지형학회지
25권3호(2018년 09월) 수록논문
최근 권호 논문
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KCI등재

1산지 경계 추출을 위한 지형학적 변수 선정과 알고리즘 개발

저자 : 최정선 ( Jungsun Choi ) , 장효진 ( Hyo Jin Jang ) , 심우진 ( Woo Jin Shim ) , 안유순 ( Yoosoon An ) , 신혜섭 ( Hyeshop Shin ) , 이승진 ( Seung-jin Lee ) , 박수진 ( Soo Jin Park )

발행기관 : 한국지형학회 간행물 : 한국지형학회지 25권 3호 발행 연도 : 2018 페이지 : pp. 1-18 (18 pages)

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In Korea, 64% of the land is known as mountain area, but the definition and classification standard of mountain are not clear. Demand for utilization and development of mountain area is increasing. In this situation, the unclear definition and scope of the mountain area can lead to the destruction of the mountain and the increase of disasters due to indiscreet permission of forestland use conversion. Therefore, this study analyzed the variables and criteria that can extract the mountain boundaries through the questionnaire survey and the terrain analysis. We developed a mountain boundary extraction algorithm that can classify topographic mountain by using selected variables. As a result, 72.1% of the total land was analyzed as mountain area. For the three catchment areas with different mountain area ratio, we compared the results with the existing data such as forestland map and cadastral map. We confirmed the differences in boundary and distribution of mountain. In a catchment area with predominantly mountainous area, the algorithm-based mountain classification results were judged to be wider than the mountain or forest of the two maps. On the other hand, in the basin where the non-mountainous region predominated, algorithm-based results yielded a lower mountain area ratio than the other two maps. In the two maps, we was able to confirm the distribution of fragmented mountains. However, these areas were classified as non-mountain areas in algorithm-based results. We concluded that this result occurred because of the algorithm, so it is necessary to refine and elaborate the algorithm afterward. Nevertheless, this algorithm can analyze the topographic variables and the optimal value by watershed that can distinguish the mountain area. The results of this study are significant in that the mountain boundaries were extracted considering the characteristics of different mountain topography by region. This study will help establish policies for stable mountain management.

KCI등재

2강릉 심곡 해안에 발달한 타포니의 물리·화학적 특성에 기초한 풍화 진행 양상

저자 : 김유정 ( Kim Yu Jung ) , 김종연 ( Kim Jong Yeon ) , 김종욱 ( Kim Jong Wook ) , 한민 ( Han Min )

발행기관 : 한국지형학회 간행물 : 한국지형학회지 25권 3호 발행 연도 : 2018 페이지 : pp. 19-42 (24 pages)

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In this study, we surveyed weathering progressing aspect by major elements variation and rock hardness by using XRF analysis, schmidt hammer, and thin section analysis. This observation suggested that the weathering process is likely to develop differently according to microstructural characteristics. R-value on the inside wall are lower than those on the outside. Also, the shadier the environment was, the closer it was to inshore areas, the R-value appeared to be lower. The movement of the elements such as Ca, Na and K shows that feldspar is hydrolyzed and can form salt crystallization like a gypsum or halite when they combine with the elements such as S or Cl. It proved a high CaO, Na2O and K2O content on flaking inside wall and rock meal. The exfoliation was mainly observed along the shady backwall and ceiling of tafoni. This helped in predicting the growth of tafoni as well as the direction of its progress.

KCI등재

3입도분포 특성을 기반으로 한 고창 연안의 과거 퇴적환경 분석

저자 : 한민 ( Han Min ) , 양동윤 ( Yang Dong-yoon ) , 박찬혁 ( Park Chanhyeok )

발행기관 : 한국지형학회 간행물 : 한국지형학회지 25권 3호 발행 연도 : 2018 페이지 : pp. 43-55 (13 pages)

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This study aimed to identify different sedimentary environments of Gochang coast according to geomorphic conditions of each bore hole. To achieve the aim, this study utilized the classification of sedimentary environmental conditions of surface sediment, which was based on grain size distribution characteristics. In other words, three sedimentary environmental conditions of sandy flat + sand beach, coastal sand dune and weathered bedrock soil, which were distinguished based on grain size distribution characteristics of mean-sorting for surface sediments, were applied to the sediments of bore holes. Four sedimentary environments could be identified in Gochang coast. First, the lake sedimentary environment originated from terrestrial sediments seems to have been dominated by weathered bedrock soil that the surface flow has deposited in a coastal wetland or a boundary, which is affected by the sea. Second, the lake sedimentary environment that is little affected by coastal sand dunes is located at the center of a valley, which is connected to the land, and the dune slack of Saban-ri. The surface flow of weather bedrock soil is the main source of deposits. However, there seems to have been a temporary influence of the sea. Third, the lake sedimentary environment that is strongly affected by coastal sand dunes is located at the dune slack of Yeongjeong-ri. This environment shows traces of a change from a coastal sand dune into the dune slack. Finally, the coastal sand dune sedimentary environment, which was investigated by boring the current coastal sand dune, shows a temporary influence of the land but seems to have maintained the overall stability. Consequently, this study demonstrated that the grain size distribution characteristics of the present surface sediments could be effectively applied to identify the sedimentary environments of the paleo bore hole sediments. In addition, the paleo change of sedimentary environment could also be identified in many places of Gochang coast. If the results of this study are combined with the age dating and geochemical analysis in future works, the paleo environmental change in Gochang coast will be restored more precisely.

KCI등재

4남해안 사천시 대포동 일대에 분포하는 고해안 퇴적물의 형성 과정과 형성 시기: 한반도 제4기 후기 지각운동의 양식과 변형률 산출을 위한 연구(II)

저자 : 신재열 ( Shin Jaeryul ) , 홍성찬 ( Hong Seongchan )

발행기관 : 한국지형학회 간행물 : 한국지형학회지 25권 3호 발행 연도 : 2018 페이지 : pp. 57-70 (14 pages)

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This study restores onshore paleo-shoreline records and establishes the nature and strain rate of neotectonism by investigating the existence and formative age of paleo-coastal sediments emerged around Sacheon-si in the Southern part of the Korean peninsula. As a result, paleo-sand bars representing 5m of the paleo-shoreline from high tide level are formed in Sacheon-si, and the formation age of these is confirmed as MIS 5c at approximately 100,000 year BP through rock surface luminescence dating to rounded gravels in paleo-sand bars. Although it is difficult to establish the uplift rate of crust precisely due to incomplete restoration of sea level records during the last interglacial stage, the uplift rate along the Southern coast of the peninsula was assumed approximately 0.72 lower than the Eastern coast during the late Quaternary in comparison to the 1st marine terrace along the Eastern coast.

KCI등재

5광승리 연안의 연안범람기원퇴적층 형성과 변화 과정에 대한 연구 - 퇴적물의 매몰연대와 화학분석을 기반으로 -

저자 : 신원정 ( Shin Won Jeong ) , 양동윤 ( Yang Dong Yoon ) , 김종연 ( Kim Jong Yeon )

발행기관 : 한국지형학회 간행물 : 한국지형학회지 25권 3호 발행 연도 : 2018 페이지 : pp. 71-87 (17 pages)

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As part of further study on Gwangseungri coastal deposits which occurred at 10 ~ 15m above sea level and was analyzed as palaeo-coastal flood-type sediments, six burial ages of six additional samples from the two cross sections (KST1 and, KST2) near to the points of the past study were estimated and the geochemical analysis was performed. Further investigation on the cross section KST1 revealed a reversal of the burial age at the bottom of the section which was identified as palaeo-flooding sediments and supposed to have been buried about 350 years ago. At the lower part of the KST1, the burial age of the sediment layer was estimated to be 3,800 years. The lower part of KST2 sediments was identified as sediments that was formed about 6,600 years ago and about 20,000 years ago.
Considering the inclination of the sediment layers, the coastal flooding sediments reported to have formed 700 years ago in the previous study are located at the top and the KST1 section analyzed in this study seemed to be connected to the lower part. The chemical analysis showed that the relationship between these layers was not continuous but had a discontinuous characteristic influenced by a specific event, and the chemical composition also showed a rapid change.
If we judge these together, the lowest part of Gwangseungri sediment layer seemed to have formed during the last glacial period but it was hard to find its origins clearly. On top of this layer, a fine sediment layer containing gravels was also formed. It seemed that sedimentation did not occur continuously, but was affected by temporary events in such a way that after a sediment layer was formed, it stopped. Since then, a coastal flooding event occurred about 700 years ago, and part of flooded sediments accumulated in the rear slope. After that, when a flood layer including additional granular materials about 350 years ago was formed, sedimentation along the slope seemed to have occurred.

KCI등재

6울산단층대 주변의 단층 지형 및 선구조 분포

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

발행기관 : 한국지형학회 간행물 : 한국지형학회지 25권 3호 발행 연도 : 2018 페이지 : pp. 89-103 (15 pages)

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This study presents results of analysis on fault-related landforms and the Quaternary fluvial landforms, which are important evidences for active faulting by identifying surface deformation, around the Ulsan Fault Zone. In addition, this study suggests lineament map and inferred active fault-line map based on analyzing linearity and continuity of these landforms and by compiling location information of existing active faults. We convince that quantitative tectonic-geomorphological analysis are an effective method for active faults tracking, in particular, considering the conditions of relatively low seismicity and surface ruptured-events in the Korean Peninsula compared to plate boundary active areas. However, research on active fault in South Korea is just an infant stage since the 1990s and requires accumulation of research achievements on development and application of various fault analysis techniques, analysing and standardizing linear structures.

KCI등재

7항공사진을 이용한 DEM 제작에 관한 연구

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

발행기관 : 한국지형학회 간행물 : 한국지형학회지 25권 3호 발행 연도 : 2018 페이지 : pp. 105-120 (16 pages)

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This study estimates possibility and limitation on production of DEM using aerial photo by comparison of DEMs using aerial photo and digital map. Mountain and urban areas show higher elevation in DEM using aerial photo than in DEM using digital map, due to height of vegetation cover and buildings, respectively. However, artificial affects due to bridge, embankment and road construction are responsible for areas with higher elevation in DEM using digital map than in DEM using aerial photo. This difference in elevation between DEMs seems to be caused by rapid change in real elevation that is not reflected in digital map. There is little difference in elevation between DEMs in plain and area with little or no vegetation cover. This study suggests that problems associated with vegetation cover and error by GCP should be fixed, although DEM using aerial photo can quantitatively and 3-dimensionally reconstruct topography with a high resolution.

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1연안해역에서 석유오염물질의 세균학적 분해에 관한 연구

(2006)홍길동 외 1명심리학41회 피인용

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2미국의 비트코인 규제

(2006)홍길동심리학41회 피인용

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2미국의 비트코인 규제

(2006)홍길동41회 피인용

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