• Title/Summary/Keyword: Beach Survey

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The Ages of Fault Activities of the Ilkwang Fault in Southeastern Korea, Revealed by Classification of Geomorphic Surfaces and Trench Survey

  • Ho, Chang;Ree, Jin-Han;Joo, Byung-Chan
    • The Korean Journal of Quaternary Research
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    • v.18 no.2 s.23
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    • pp.1-2
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    • 2004
  • The Ilkwang Fault is NNE-striking, elongated 40 Km between Ulsan and Haendae-ku, Busan in southeastem part of the Korean Peninsula(Kim, D.H. et al., 1989; Kim, J.S. et al., 2003). This paper is mainly concemed about the ages of the fault activities especially in the Quatemary, infered from classification of geomorphic surface and trench excavation for the construction of Singori nuclear power plant. The geomorphi surfaces are classified into the Beach and the Alluvial plain, the 10 m a.s.l. Marine terrace, the 20 m a.s.l. Marine terrace, the Reworked surface of 45 m a.s.l. Marine terrace and the Low relief erosional surface, from lower to higher altitude. The Beach and the Alluvial plain are elongated to the Holocene terrace(ist terrace, choi, 2003). The 10 m a.s.l. Marine terrace is correlated to 2nd terrace (MIS 5em 125 Ka. y. B.P., Choi, 1998). The 45 m a.s.l. Marine terace is correlated to the Lower marine terrace (MIS 7,220 Ka. y. B.P., Choi, 2003 or MIS 9,320 y. B.P.) to the Gwanganri terrace(Penultimate interglacial age, 200-200 Ka. Y. B.P., Oh, 1981). The Low relief erosional surface is distributed coastal side, the Reworked surface of 45 m a.s.l. Marine terrace inland side by the Ilkwang Fault Line as the boundary line. But the former is above 10 m higher in relative height than the latter. The 20 m a.s.l. Marine terrace on the elongation line of the Ilkwang Fault reveals no dislocation. A site was trenched on the straight contract line with $N30^{\circ}$ E-striking between the 10 m a.s.l. Marine terrace and the 20 m a.s.l. Marine terrace. Fault line or dislocation was not observable in the trench excavation. Accordingly, the straight contact line is inferred as the ancient shoreline of the 10 m a.s.l. Marine terrace. The Ages of the Fault activities are inferred after the formation of the Ichonri Formation - before the formation of the 45 m a.s.l. Marine terrace (220 Ka. y. B.P. or 320 Ka. y. B.P.). The Low relief erosional surface was an island above the sea-level during the formation of the 45 m a.s.l. Marine terrace in the paleogeography.

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Determining Improvement Priorities of Barrier Free Components for Beaches through M-IPA (M-IPA를 이용한 해수욕장 Barrier Free 환경조성 요소의 개선 우선순위 분석)

  • Choi, Seo-Yeon;Lee, Seok-Hwan;Shin, Kang-Won
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.11 no.12
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    • pp.5143-5150
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    • 2010
  • A number of cities are committed to enhancing the barrier-free (BF) environments. However, no attempts have been made to examine the BF environment design concept by accounting for the universal BF components, which should be improved for providing both disabled people and non-disabled people with better BF environments. With this challenge in mind, this study determines the improvement priorities of BF components for beaches in the city of Busan by investigating the results of satisfaction survey, which was administered to disabled and non-disabled visitors. The modified importance-performance analysis (M-IPA) results show that "sanitation facilities" are the universal BF components having the highest improvement priority. The analysis results also indicate that "access facilities" have the second highest improvement priority for disabled people while "amenity facilities" have the second highest improvement priority for non-disabled people. It is highly expected that the suggested improvement priorities of BF components can be used for policy makers to develop more flexible plans when designing the BF beach.

Survey of coastal topography using images from a single UAV (단일 UAV를 이용한 해안 지형 측량)

  • Noh, Hyoseob;Kim, Byunguk;Lee, Minjae;Park, Yong Sung;Bang, Ki Young;Yoo, Hojun
    • Journal of Korea Water Resources Association
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    • v.56 no.spc1
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    • pp.1027-1036
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    • 2023
  • Coastal topographic information is crucial in coastal management, but point measurment based approeaches, which are labor intensive, are generally applied to land and underwater, separately. This study introduces an efficient method enabling land and undetwater surveys using an unmanned aerial vehicle (UAV). This method involves applying two different algorithms to measure the topography on land and water depth, respectively, using UAV imagery and merge them to reconstruct whole coastal digital elevation model. Acquisition of the landside terrain is achieved using the Structure-from-Motion Multi-View Stereo technique with spatial scan imagery. Independently, underwater bathymetry is retrieved by employing a depth inversion technique with a drone-acquired wave field video. After merging the two digital elevation models into a local coordinate, interpolation is performed for areas where terrain measurement is not feasible, ultimately obtaining a continuous nearshore terrain. We applied the proposed survey technique to Jangsa Beach, South Korea, and verified that detailed terrain characteristics, such as berm, can be measured. The proposed UAV-based survey method has significant efficiency in terms of time, cost, and safety compared to existing methods.

Analysis of Seabottom and Habitat Environment Characteristics based on Detailed Bathymetry in the Northern Shore of the East Sea(Gyeongpo Beach, Gangneung) (정밀 해저지형 자료 기반 동해 북부 연안(강릉 경포) 서식지 해저면 환경 특성 연구)

  • Lee, Myoung Hoon;Rho, Hyun Soo;Lee, Hee Gab;Park, Chan Hong;Kim, Chang Hwan
    • Economic and Environmental Geology
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    • v.53 no.6
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    • pp.729-742
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    • 2020
  • In this study, we analyze seabottom conditions and characteristics integrated with topographic data, seafloor mosaic, underwater images and orthophoto(drone) of soft-hard bottom area around the Sib-Ri rock in the northern shore of the East Sea(Gyeongpo Beach, Gangneung). We obtained field survey data around the Sib-Ri rock(about 600 m × 600 m). The Sib-Ri rock is formed by two exposed rocks and surrounding reef. The artificial reef zone made by about 200 ~ 300 structures is shown the western area of the Sib-Ri rock. The underwater rock region is extended from the southwestern area of the exposed the Sib-Ri rock with 9 ~ 11 m depth range. The most broad rocky seabottom area is located in the southwestren area of the Sib-Ri rock with 10 ~ 13 m depth range. The study area were classified into 4 types of seabottom environment based on the analysis of bathymetric data, seafloor mosaics, composition of sediments and images(underwater and drone). The underwater rock zones(Type I) are the most distributed area around the Sib-Ri Rock(about 600 m × 600 m). The soft seabottom area made by sediments layer showed 2 types(Type II: gS(gravelly Sand), Type III: S(Sand)) in the areas between underwater rock zones and western part of the Sib-Ri rock(toward Gyeongpo Beach). The artificial reef zone with a lot of structures is located in the western part of the Sib-Ri rock. Marine algae(about 6 species), Phylum porifera(about 2 species), Phylum echinodermata(about 3 species), Phylum mollusca(about 3 species) and Phylum chordata(about 2 species) are dominant faunal group of underwater image analysis area(about 10 m × 10 m) in the northwestern part of the Sib-Ri rock. The habitat of Phylym mollusca(Lottia dorsuosa, Septifer virgatus) and Phylum arthropoda(Pollicipes mitella, Chthamalus challengeri hoek) appears in the intertidal zone of the Sib-Ri rock. And it is possible to estimate the range and distribution of the habitat based on the integrated study of orthphoto(drone) and bathymetry data. The integrated visualization and mapping techniques using seafloor mosaic images, sediments analysis, underwater images, orthophoto(drone) and topographic data can provide and contribute to figure out the seabottom conditions and characteristics in the shore of the East Sea.

A Proposed Vitalization Plan based on Residents' Perception for Gunsan Bi-eung Port Development Plan (군산 비응항 개발사업에 대한 지역주민의 인식 및 활성화 방안)

  • Lee, Jeong-Rock;Park, Jong-Chun;Kim, Hye-Young;Yoon, Yi-Na;Yoo, Sun-Kyoung
    • Journal of the Economic Geographical Society of Korea
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    • v.14 no.4
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    • pp.642-656
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    • 2011
  • As a part of the Saemangeum development, the Gunsan Bi-eung port is underway to be developed for a tourism complex. Since the perception and preferences of the residents are one of the most important steps for the project, those were surveyed and analyzed to generate a proposed vitalization plan. Based on the survey, most of residents had negative opinions on the current development and condition as well as the effectiveness of the development in the future. Residents also pointed out that leisure facilities and higher level of accommodation were necessary, and desired a coastal deck in the Bi-eung beach. Therefore, for vitalization of Bi-eung port area, construction of a comprehensive resort with sports and leisure facility is suggested to attract visitors. Also, efforts from residents and administrative supports are required in marketing, advertizement, and sound business environment.

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A Study on the Interpretation of Amenity Structure for the Creation of Urban Landscape (쾌적한 도시환경의 창출을 위한 도시 어메니티 구조에 관한 연구)

  • 김승환;변문기
    • Journal of the Korean Institute of Landscape Architecture
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    • v.18 no.4
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    • pp.101-115
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    • 1991
  • A study on the method of evaluation the urban amenity structure in Pusan city was established. Finally a survey sites out of 41 regions were selected on the basis of questionnaires : Taejong-dae and Haeun-dae as a seascape, Pumosa and Daesin-park as a mountain, Daechong-park and Seongjigok-park as a mixed, and Chungryulsa, Yongdoosan-park and U. N. Cemetry as a urban type. The abstracted results of amenity elements were revealed as natural environments including convex type as beach, reservoir, valley and mountain, and plant elements including woods and flower beds which raised amenity. The elements of social surroundings including children's playing, the aged's rest, and elements of structures including historic and memorial structures and high buildings. Amenity element made up of each space by region were abstracted from the Semantic Differential method. According to the factor analysis on the ground SD scale values, Kaiser's measure of sampling adequacy for 24 variables is 08602 and very high. Four factors including pleasantness, healthiness, convenience and safety showed 54.42 percent for total variance. By means of multiple regression, the model was as follows : Y=1.6636+0.3684X4+0.1955X11+0.1614X15-0.1688X23+0.1468X24. Therefore, Y:amenity, X4:beautiful-ugly, X11:clean-dirty, X15:creative-imitative, X23:cozy-dreary, X24:free-restrained. All variables in the model were significant at 0.001 level. According to the results of regression on satisfaction, the variables of satisfaction affecting amenity are the size of green space, the condition of management and the harmony with the surroundings. I think the considerating on the above could improve amenity of each region and further Pusan city.

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First records of Hemicyclops tanakai Itoh and Nishida, 2002 and Tisbe ensifer Fischer, 1860 (Crustacea, Copepoda) in Korea

  • Karanovic, Tomislav;Lee, Wonchoel
    • Journal of Species Research
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    • v.5 no.3
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    • pp.289-299
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    • 2016
  • Extensive survey of invertebrates in Korea, led by the National Institute of Biological Resources in Incheon, continues to uncover many new and endemic species, but also elements of neighbouring faunas that were previously unknown here. Hemicyclops tanakai Itoh and Nishida, 2002 was originally described from estuarine mud-flats in Tokyo Bay, Japan. We report one male and two females from a sandy beach on Jeju Island, which represent its first record in Korea and second record ever. No morphological differences were observed between these two disjunct populations, so we expect more records of this species in Korea and Japan. Tisbe ensifer Fischer, 1860 was originally described from Madeira and later on reported from numerous other parts of the Northern Atlantic, as well as from the Indian Ocean. We report two females from a shallow littoral in Sokcho, which represents its first record in Korea and the first record in the entire Pacific Ocean. Because of morphological discrepancies reported in previous records we recognize that this species might be in reality a species complex, and we only tentatively identify our Korean specimens as T. cf. ensifer. We provide numerous light photographs of both species in addition to short descriptions, in hope that they might elucidate global problems of their zoogeography and dispersal of small marine invertebrates in general. Further samplings from Korea and other parts of the world will be necessary to test our identifications and phylogenetic relationships of Korean populations with molecular and other tools.

An Establishment Specialization the Planning of Fishing Villages in Biando via Analysing Amenity Resources (어메니티자원 분석을 통한 비안도 어촌 마을 특화계획)

  • Lee, Chan;Lee, Doohyeong;Kang, Hyunkyung;An, Kyungjin
    • Journal of Korean Society of Rural Planning
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    • v.19 no.1
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    • pp.209-220
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    • 2013
  • The aim of this study is to establish the planning of Biando fishing village where can be well-known fishing villages in Korea. In order to have highlighted a tourist attractions, the identities of Biando fishing village were investigated natural resources, amenity resources, ecological resources and so on. Based on these resources, the planning of Biando fishing village considers to between community facilities and community spaces. To create the attractive fishing village, the study was underwent 5 process. The 5 process is followed as; 1) Choose the planning site 2) Literature review 3) Fields survey 4) Site Analysis 5) Spatial Planning. Through those results, Biando fishing village were classified 4 spaces. Each 4 spaces have got their own theme. The main focus of 4 spaces was associated with communicating between space and space, connecting between space and space. The first space theme was "Meeting the geese" and the main focus of planning was entry space creating. The second space theme was "Walking in the heaven" and the main focus of planning was ecological resource exploring space and relaxing space. The third space theme was "Secret of shingle beach" and the main focus of planning was leisure and experience space. Last space theme was "Falling into the sea" and the main focus of planning was trekking and leisure space.

Landscape Changes during the 20th Century of Ssangho, Gapyeongri wetland, Gunggaeho and Yeomgaeho, Yangyang-gun, Gangwon Province (강원도 양양군 쌍호, 가평리습지, 궁개호, 염개호의 20세기 경관 변화)

  • YOON, Soon-Ock;HWANG, Sangill;PARK, Chung-Sun;JIN, Min-Kyoung
    • Journal of The Geomorphological Association of Korea
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    • v.17 no.4
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    • pp.41-52
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    • 2010
  • Coastal lagoons(Ssangho, Gapyeongri wetland, Gunggaeho and Yeomgaeho) distribute densely around Osan-ri, Yangyang-gun. While Ssangho with the representative lagoon group in the East Coast has maintained the lagoon conditions of water surface since it was formed during the Climax of transgression, the others were formed at the swale areas of sand beach. They vary considerably in area reduction rates and position variations during the 20th century, and the causes examined can be divided into natural, human and other factors. They result in the lagoon aggradation stage by geomorphic development, reclamation due to rapid industrialization and urban development during the 20th century, and lacks of understanding on values of small coastal lagoon or errors in mapping and lags of survey techniques. Therefore, the plans for lagoon restorations should be proceeded by the individual properties of lagoons. The restorations of Ssangho are recommended preferentially and it is desirable to restore to the lagoon conditions of 1920s when the influences of human were minimum.

IPA Study of Landscape Potentiality of Agricultural and Fishery Heritages - A Focus on Cheongsando - (농어업유산의 경관 잠재력 파악을 위한 IPA 연구 - 청산도를 중심으로 -)

  • Kim, Dong-Chan;Choi, Woo-Young
    • Journal of the Korean Institute of Landscape Architecture
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    • v.42 no.4
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    • pp.76-88
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    • 2014
  • The purpose of this study is to derive landscape characteristic elements of agricultural and fishery heritage and to classify landscape characteristic elements of Cheongsando designated as Korean agricultural and fishery heritage No.1 as well as a Globally Important Agricultural Heritage System (GIAHS). Additionally, this study was conducted to suggest priority for conservation and management of Cheongsando by grasping differences between factors which visitors deem as important and satisfying. To implement this study, the literature review was written, an on-site survey to derive landscape characteristic elements of Cheongsando and a survey on importance and satisfaction of landscape characteristic elements of Cheongsando were conducted, and reliability analysis, descriptive statistical analysis and IPA analysis were performed using SPSS 20.0. The results are as follows: The analysis showed the factors requiring persistent efforts in the first quadrant are the rape flower garden, the sea, green barley field, flat stone paddy field, breakwater and lighthouse, abalone farms, stone houses, thatched houses, a coastal road, the slow road, Stonewall Walkway of Seongseo Village, and residents' agricultural behaviors. The analysis showed the factors needing intensive management strategies in the second quadrant are the surrounding mountain area, dock, Docheong Harbor, vessels, fish market, Doksari stone wall, garish-roofed farm villages, excursion school to a slow island, pension and cafe, bus stop, shade trees, Raw Fish Street, the beach and the filming site. Analysis indicated that the factors needing management control in the third quadrant are the pine grove, the beach, tidal mudflat, the garlic fields, vinyl greenhouses, grain drying yard, sea mustard drying yard, heritage center, Choboon, Dangri exorcism, the market place, residents' fishery behaviors, residents' industrial behaviors, residents' ordinary behaviors, visitors' behaviors that visiting the dock, visitors' behaviors that walking the slow road, visitors' behaviors that eating and shopping for specialties, visitors' behaviors that experiencing agriculture and fishery. Excessive effort factors in the fourth quadrant were not derived.