• Korean Journal of Remote Sensing
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• v.38 no.6_1
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• pp.1315-1328
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• 2022

Sinduri beach is a typical sedimentary landform that forms sand dunes due to the influence of the northwest wind in winter. Due to the its large scale and well-developed nature, it has been recognized for conservation value and is currently designated as Natural Monument No. 431, and continuous monitoring is required in terms of the preservation of topographical values. In this study, aerial images, drone images, and drone-based LiDAR data during 36 years were used for long-term topographical change observation of the Sinduri coastal sand dunes located in Taean-gun, Chungcheongnam-do. To implement this, the amount of change in elevation and volume for each period was calculated by applying the difference of Digital Elevation Model (DEM) based on raster calculation using the numerical elevation model generated from the raw data. Also, the amount of change in volume based on probability was calculated using the error propagation law for the intrinsic error of each data source. As a result, it can be seen that from 1986 to 2022, deposition of 35,119 m³ occurred in region of interest A (area: 17,960 m²) and 54,954 m³ of deposition occurred in region of interest B (area: 17,686 m²).

• Economic and Environmental Geology
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• v.47 no.6
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• pp.589-599
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• 2014

This study selected optimal sites in Myeongsasimni located in west coast of Korea for stratigraphic research containing extreme climate event during quaternary period by spatio-temporal analyses of changes in sedimentary environment and land use employing 1918 topographic map, 2000 digital terrain map, 1976 and 2012 air photographies. The study area shows no significant changes in topographic characteristics that hilly areas with relatively large variations in elevation are distributed over north and south part of the study area, and sand dues are developed along the coast line. Moreover, flat low lying areas are located at the back side of the sand dues. The movement of surface run off and sediment loads shows two major trends of inland direction flow from back sides of sand dunes and outland direction flow from high terrains inland, and the two flows merge into the stream located in the center of the study area. Two sink with individual area of $0.2km^2$ are observed in Yongjeong-ri and Jaryong-ri which are located in south central part and south part of the study area, respectively. In addition, sea level change simulation reveals that $3.4km^2$ and $3.64km^2$ are inundated with 3 m of sea level rise in 1918 and 2000, respectively, and it would contribute to chase sea level change records preserved in stratigraphy. The inundated areas overlaps well with sink areas where it indicates the low lying areas located in south cental and south part of the study area are identical for sediment accumulation. The areas with minimal human impact on sediment records over last 100 years are $3.51km^2$ distributed over central and south part of the study area with the land use changes of mud and rice field in 1918 to rice field in 2012. The candidate sites of $0.15km^2$ in central part and $0.09km^2$ in south part are identified for preferable locations of geologic record of extreme climate events during quaternary period based on the overlay analysis of optimal sedimentary environment and land use changes.

• Journal of the Korean Geographical Society
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• v.51 no.4
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• pp.473-490
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• 2016

This study aims to analyze the regional geomorphology of the Chugaryeong Tectonic Valley which has been one of the most important areas for Korean geomorphological research. Though the Chugaryeong Tectonic Valley has been thought important for the tectonic settings and orographic processes in Korea, geomorphological and geological discussions still are sustaining for finding out evidences of the settings. The Chugaryeong valley region has many geomorphic themes such as tectonic structure, volcanics, river, mountain, terrace, lake and sediment layers. The research of the valley focuses on the comprehensive analysis of the previous references mainly including geomorphic naming, geomorphology and geology, and history of the study for estimating the origin of tectonic valley, formation of the lave plateau, change of river structure by dissection, restoration of the landform before lava eruption, and the processes and age dating of the various landforms. Conclusively, the Chugaryeong Tectonic Valley may be recognized as the linear region of the tectonic and volcanic landforms with other various applied geomorphic settings.

• Journal of the Korean association of regional geographers
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• v.7 no.2
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• pp.82-96
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• 2001

The purpose of this study is to investigate the wise use and the management of intertidal environment. For tills purpose, we selected the Kanghwa island mudflat which is one of the most important intertidal region in Korea peninsula. The main research method is surface sediment and several map analysis. The results are as follows. (1) The study area is worldwide coastal wetland in view of ecology and geomorphology. But most of the salt marsh has been reclaimed since Japanese colonial period, the study area is mainly composed of mudflat. (2) The mean tidal regime of study area is 7.3m. From this tidal regime, the study area is subdivided into four distinct areas: the high intertidal area the middle intertidal area the low intertidal area and the shallow sea area terrestrial area near mudflat. (3) The mean particle size of surface sediment is sand 41.5%, silt 47.3%, clay 11.2%. This particle size pattern indicates the ecological characteristics of surface sediment of the study area. The proportion of clay is increasing to the open sea. (5) The pursuit of the wise use and the management must be implemented by the consideration of not only ecologic and sedimentary characteristics but also of the eco-tour site plan. And the entire use and management subject is different in each area.

• 한국지구과학회:학술대회논문집
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• 2010.04a
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• pp.65-65
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• 2010

지구상의 광물, 암석, 화석 그리고 지질구조, 지형 등의 개개의 지형 지질학적 요소의 특성과 다른 대상과의 상호관계를 지질다양성이라고 한다. 지질다양성은 지형 지질에 내재되어 있는 본질적, 문화적, 심미적, 경제적, 기능적, 연구 및 교육적 가치를 이해하고 보전함으로써 유지 할 수 있다. 이 연구는 지질다양성에 대한 흥미와 이해를 높이기 위해 학술적 보전 가치가 있는 강원도 영월지역을 선정하여 그 특징을 분석하고 지질다양성을 효율적으로 활용하는 방안을 제언하고자 한다. 강원도 영월지역의 지질다양성에 대한 조사는 지형경관 자원과 지질특성의 희소성, 대표성, 학문적 가치 및 활용가치에 중점을 두고 전문가와 협의하여 보존가치가 있고 지리적으로 접근하기 편리한 노두 8곳을 선별하였다. 선별된 8곳의 노두는 고생대의 암석과 지층, 뚜렷한 퇴적구조, 화석, 규모가 크고 전형적인 하천지형이 나타나는 곳으로 지질유산(지형 지질)의 내재적 가치와 지구과학적 이해를 도울 수 있는 대상지이다. 대상지의 지질다양성에 대한 조사를 토대로 야외 지질학습장과 지질공원 및 지질명소, 과학적 특별흥미지역 등을 개발하여 제공함으로써 지형 지질에 대한 자기주도적 학습 능력 신장과 지구과학에 대한 흥미와 이해를 증진시키는 장을 마련해 줄 수 있을 것이다. 또한 과학적 가치와 더불어 사회적, 문화적 가치를 부여하여 보전함으로써 지질유산(지형 지질)에 대한 새로운 시각이 생길 것이다.

• Proceedings of the KGS Conference
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• 2003.11a
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• pp.3-7
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• 2003

북한강의 가장 큰 지류하천인 소양강은 발원지와 최상류부가 북한 지역이며, 상류부에서도 남한 지역은 휴전선에 접하여 군사지역이 많기 때문에 연구를 위한 접근과 활동이 쉽지 않다. 또한 하류부는 소양강댐으로 인해 하천 양안의 대부분이 소양호의 수면 아래에 수몰되어 있다. 이러한 이유로 인해 소양강을 대상으로 한 지리학 및 지형학적 연구 성과는 거의 없다. 소양강은 남한의 하천 유역분지 중 최북단에 위치하며 태백산맥에 바로 접하고 있어, 태백산맥 일대의 구조 운동으로 인해 활발한 하각(incision) 작용이 나타난다. (중략)

• Proceedings of the Korean Society of Coastal and Ocean Engineers Conference
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• 2003.08a
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• pp.245-248
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• 2003

Bragg반사는 입사된 주기파의 파장이 해저지형의 파장의 두 배가 될 때 공명현상(resonance)에 의해 반사율이 매우 커지는 물리 현상을 말한다. 즉, 외해에서 주기성을 띄는 파랑이 입사해 올 때, 특정형태의 해저지형을 이용하면 상당량의 에너지를 외해로 반사시킬 수 있다. 이와 같은 Bragg 반사개념을 수중방파제(submerged breakwater)에 응용하면 항만이나 방파제 등의 해안구조물을 경제적으로 설계 및 보호 할 수 있고, 해안선 보호 및 불필요한 퇴적 등을 고려한 연안개발계획의 효율적 수립이 가능하다. (중략)

• Journal of the Korean Society for Marine Environment & Energy
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• v.11 no.2
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• pp.70-77
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• 2008

In this study, to establish countermeasure from marine casualties as a basic study fur long-term prediction of topographical change around Jinudo in the Nakdong river estuary, spatio-temporal topographical change monitoring was carried out. Also, in order to estimate the deposition variations concerning SS (Suspended Solid) flux which moved at St.S1 during neap and spring tide, respectively. From the topographical monitoring, it was found that the annual mean ground level and deposition rate were 141 mm and 0.36 mm/day and all parts except the northern part of Jinudo had the active topographical changes and a tendency to annually deposit. From vertical distribution of SS net fluxes, $SS_{LH}$ (latitudinal SS net flux) during spring tide overall flows average 28 $kg/m^2/hr$ (eastward), and $SS_{LV}$ (longitudinal SS net flux) flows average 11.1 $kg/m^2/hr$ (northward). And, $SS_{LH}$ overall flows average 4.8 $kg/m^2/hr$ (eastward), and $SS_{LV}$ flows average 1.5 $kg/m^2/hr$ (northward) during neap tide similar with spring tide. The depth averaged values of the latitudinal and longitudinal SS net fluxes during spring tide were approximately 6 times higher than those during neap tide. As result of, it was considered that topographical change of southern part of Jinudo was affected by resuspension of bottom sediments due to strong current in bottom layer during flood flow.

• Journal of the Korean Association of Geographic Information Studies
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• v.8 no.2
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• pp.186-195
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• 2005

Topography of beach line is keeping stability for several years, their soil values have been maintained in balances. Install of coastal structures have caused deformation for beaches and acted as a function to structures. Therefore, quantitative prediction of beaches topography according to structure install is required to prevent the beaches deformation and progress proper coastal preservation work. In this study, we analyzed coastal changes caused by erosion and accretion according to development and drew up a cross-section to share 8 stations using coordinates and depth surveying in groin of Soheuksan island port. Elevation distribution and changes by observation period is calculated -0.30m~+0.20m after comparing results of five months in October 7, 2004 surveying results and fell into insignificance. We thinks periodic observation of coastal erosion and accretion take place for the season and long-term coastal changes in beaches width is analyzed.

• Journal of the Korean Geographical Society
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• v.39 no.6 s.105
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• pp.863-872
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• 2004

The coastal alluvial plain, sand dune, tidal nat might be the most prominent coastal landscape in western coast of Korea. The purpose of this paper is to examine the irrigation and drainage systems of the alluvial plain in the tidal coast. This study is concerned on the geomorphological and cultural landscapes of the alluvial plain in the western coast of the South Jeolla Province. The alluvial deposits have developed mainly by the actions of tidal currents, rather than transporting sediments by stream. The transformation of plain has been affected by human agency since 1920's. Dwellers have constructed the reservoir, banks, dammed pools, lock gates, and tide-dykes for the reclamation, irrigation, and drainage on the alluvial plain, coastal sanddune, and tidal flats.