• Title/Summary/Keyword: 한국 지형학회

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Topographical Landscapes and their Controlling Geological Factors in the Cheongryangsan Provincial Park: Lithologic Difference and Faults (청량산 도립공원의 지형경관과 지질학적 지배 요인: 암질차이와 단층)

  • Hwang, Sang Koo;Son, Young Woo;Son, Jin Dam
    • The Journal of the Petrological Society of Korea
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    • v.26 no.3
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    • pp.167-181
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    • 2017
  • Cheongryangsan area ($49.51km^2$) has been designated as the Provincial Park in 1982, because it has magnificent aspect and seasonally spectacular landscapes. Especially, Cheongryangsa sitey ($4.09km^2$) has been designated as Noted Scenery No. 23 in 2007, because it has the same topographical landscape as rock cliffs, rock peaks and caves. The most spectacular landscapes are exhibited in the Cheongryangsan Conglomerate and Osipbong Basalt. There are twelve rock peaks on the ridges of the two strata, and many rock cliffs in the several valleys of strata, in which a few caves are formed by differential weathering and erosion. The valleys, in which flow Cheongryang, Bukgok and Cheonae streams, are classified as fault valleys along WNW-ESE faults. The rock cliffs were generated from vertical joints parallel to WNW-ESE faults in the two strata, and the caves were formed by differential weathering and erosion along bedding of sandstones and shales intercalated in the conglomerates. The rock peaks are landscapes formed by differential erosion along crossed vertical joints in the ridges. The vertical joints are developed subparallel to two WNW-ESE faults and a NNE-WWS fault. Therefore the topographical features are caused by existence of the faults and Lithologic difference in the Cheongryangsan Conglomerate and Osipbong Basalt, and by differential weathering and erosion along them.

Topographical Landscapes and their Controlling Geological Factors in the Juwangsan National Park: Welding Facies and Columnar Joints (주왕산 국립공원의 지형경관과 지질학적 지배 요인: 용결상과 주상절리)

  • Hwang, Sang-Koo;Kim, Jae-Ho
    • The Journal of the Petrological Society of Korea
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    • v.18 no.3
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    • pp.195-209
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    • 2009
  • Juwangsan area($107.4km^2$) has been designated as the twelfth National Park in 1976, because it has magnificent aspect and seasonally spectacular landscapes. Juwang valley($9,177.5m^2$) has been designated as Noted Scenery No. 11 in 2003, because it has the same topographical landscape as rock domes, rock cliffs, caves, waterfalls and plunge pools. The most spectacular landscapes are exhibited in the densely welded zone of the Juwangsan Tuff. The rock cliffs generated from vertical joints in the densely welded zone, in which there are the same many rock cliffs as Geupsudae, Haksodae, Sinseondae, Mangwoldae, Giam and Byeongpungbawi, three caves such as Juwanggul, Mujanggul and Yeonhwagul in the cliff. The cliffs and caves are landscapes that were generated from vertical joints in the densely welded zone, and the rock domes and waterfalls are landscapes of erosional vertical joint planes in the zone. The vertical joints are columnar joints formed during cooling of the Juwangsan Tuff. Therefore the topographical features cause the cooling columnar joints that are vertically intersected in the densely welded zone of the Juwangsan Tuff.

Application Methods of the Natural Topography and Environmental Facts for Building Optimum Eco-Village (최적 생태마을 조성을 위한 자연지형과 환경요인 적용기법 연구)

  • YEON, Sang-Ho
    • Journal of the Korean Association of Geographic Information Studies
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    • v.18 no.4
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    • pp.59-67
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    • 2015
  • There are several methods for building optimal eco-villages in a narrow territory. To derive a new optimal eco-village factors by combining environmental factors from ubiquitous sensor network and topography factors, this study attempted to investigate ecological spaces of specific human settlements, to compare those with the spatial analytical results on natural real settlements, and to draw a construction plan for an optimal ecological village. This study presented a new milestone for building eco-villages in the large or small village units of the entire country in the fact that we can find a living space to make natural healing possible by integrating ecological factors and wellbeing spatial configuration using more healthy natural space. Also, this study proposed a practical method to do so.

Geotourism using the Geographical Resources on Hong Island (홍도 지형 자원을 활용한 지오투어리즘)

  • Park, Mi-Young
    • Journal of the Korean association of regional geographers
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    • v.17 no.1
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    • pp.109-121
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    • 2011
  • There are three natural conservation systems that UNESCO assigns: World Heritage, Biosphere Reserve and Geopark. Geopark is one of three preservation zones that UNESCO conducts. In this paper I will explain the meaning of a Geopark as well as suggest that one should be set up in Korea. Geotourism is one important aspect of Geopark. Geopark's main purpose is not only for sightseeing but also conservation and understanding the value of nature through geological and geographical features. I have analyzed the local guide's interpretations from a Hongdo Island cruise tour and suggested new way of interpretation for the tour with the concept of Korean Geotourism in mind.

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The Acquisition of precise three dimentional topographic information by GPS (GPS에 의한 정밀 3차원 지형정보 획득)

  • 강준묵;이용창;박필호
    • Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
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    • v.11 no.2
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    • pp.27-34
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    • 1993
  • The construction of the accurate, economic topographic information for a sorts of work and a base facilities of country is one of the very important subjects. In this paper, Global network which include south KOREA and Regional network which include Chung-Nam/Chung-Buk provinces were designed, obtained WGS84 coordinates of control points in networks by GPS. The coefficients of transformation between WGS84 coordinates and Bessel coordinates in consideration of geoid undulations was derived by 7-parameter method. Also, the efficiency of 7-parameter method was proved through successful application of T.M. and U.T.M projection for the precise mapping, and the effectiveness of the aquisition of three dimensional topographic information by GPS was suggested.

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The Characteristics of January and August Clo-Unit Distribution in North Korea (북한의 1월.8월 인체보온지수 분포의 특성)

  • Kang, Chul-Sung
    • Journal of the Korean association of regional geographers
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    • v.10 no.1
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    • pp.151-157
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    • 2004
  • In January the clo-values show two characteristic patterns on the insulation, Samjiyon has the highest clo-values while Changjon has the lowest in North Korea, and the coastal areas are lower than in the interior areas. This regional difference is a result of predominant temperature, wind speed and orographic effects. Particularly, in August the coastal areas are generally lower than the interior areas because of orographic effects(wind direction, wind speed). All regions except Samjiyon legions and northern interior regions have low values during the period from the early August to the middle of August. These are largely derived from the stable weather with the highest temperature, humidity and strong radiation by the North Pacific Anticyclone appears in Eastern Asia.

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Classification of Binary Obstacle Terrain Based on 3D World Models for Unmanned Robots (무인로봇을 위한 3D 월드모델에 기초한 Binary 장애지형의 판정)

  • Jin, Gang-Gyoo;Lee, Hyun-Sik;Lee, Yun-Hyung;Lee, Young-Il;Park, Yong-Woon
    • Journal of the Korea Institute of Military Science and Technology
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    • v.12 no.4
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    • pp.516-523
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    • 2009
  • Recently, the applications of unmanned robots are increasing in various fields including surveillance and reconnaissance, planet exploration and disaster relief. To perform their missions with success, the robots should be able to evaluate terrain's characteristics quantitatively and identify traversable regions to progress toward a goal using mounted sensors. Recently, the authors have proposed techniques that extract terrain information and analyze traversability for off-road navigation of an unmanned robot. In this paper, we examine the use of 3D world models(terrain maps) to classify obstacle and safe terrain for increasing the reliability of the proposed techniques. A world model is divided into several patches and each patch is classified as belonging either to an obstacle or a non-obstacle using three types of metrics. The effectiveness of the proposed method is verified on real terrain maps.

Performance Enhancing Technique for Terrain Referenced Navigation Systems using Terrain Roughness and Information Gain Based on Information Theory (정보이론기반 지형 험준도 및 정보이득을 이용한 지형대조항법 성능 향상 기법)

  • Nam, Seongho
    • Journal of the Korea Institute of Military Science and Technology
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    • v.20 no.3
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    • pp.307-314
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    • 2017
  • Terrain referenced navigation(TRN) system is an attractive method for obtaining position based on terrain measurements and a terrain map. We focus on TRN systems based on the point mass filter(PMF) which is one of the recursive Bayesian method. In this paper, we propose two kinds of performance index for Bayesian filter. The proposed indices are based on entropy and mutual information from information theory. The first index measures roughness of terrain based on entropy of likelihood. The second index named by information gain, which is the mutual information between priori and posteriori distribution, is a quantity of information gained by updating measurement at each step. The proposed two indices are used to determine whether the solution from TRN is adequate for TRN/INS integration or not, and this scheme gives the performance improvement. Simulation result shows that the proposed indices are meaningful and the proposed algorithm performs better than normal TRN algorithm.

Coastally Trapped Waves over a Double Shelf Topography(I) : Free Waves with Exponential Topography (양향성 대륙붕의 대륙붕파(I): 지수함수적 해저지형에서의 자유파)

  • PANG Ig-Chan
    • Korean Journal of Fisheries and Aquatic Sciences
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    • v.24 no.6
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    • pp.428-436
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    • 1991
  • Double shelf topography allows the existence of two sets of waves propagating in opposite directons. In the case that two shelves are apart sufficiently enough, the solutions show two independent sets of waves which recover the single shelf waves. However, if the distance between two shelves is less than the Rossby deformation radius, the waves become dependent on the geometry of both shelves. Even over a double shelf topography, shelf waves propagate with the shallow water to the right in the Northern Hemisphere. The group velocity of shelf wave has the same direction as phase velocity in the long wave case, but the opposite direction in the short wave case. Each shelf mode has a zero group velocity at some intermediate value of wave length.

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A Study on Delta Processes at the Estuary of Nak-Dong River (낙동강 하구 사주 발달에 관한 연구)

  • Kim Sang-Ho;Shin Seung-Ho;Yang Sang-Yong;Lee Joong-Woo
    • Journal of the Korean Society for Marine Environment & Energy
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    • v.6 no.3
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    • pp.26-36
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    • 2003
  • Collected and analyzed the coastal processes at the estuary of Nak-Dong river and its near coastal area from the history of field measurements. Introduced a numerical model to predict three dimensional topographical change which are evaluated from the nearshore wave and the wave induced current fields for the objective area, and later it were related to the development of beach and shoals. With the comparison between measured and calculated, we found that the changes on the coastline and sand spit and bar development are induced not only by artificial forces due to the construction of river dike, but also by the strong impact of wave induced current. In future days, it is expected that coastline change and sand bar development at the lee side of Jinwoo-Deung and at the front of Dadae beach.

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