• Title, Summary, Keyword: 경관지수

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Influence of Grid Cell Size and Flow Routing Algorithm on Soil-Landform Modeling (수치고도모델의 격자크기와 유수흐름 알고리듬의 선택이 토양경관 모델링에 미치는 영향)

  • Park, S.J.;Ruecker, G.R.;Agyare, W.A.;Akramhanov, A.;Kim, D.;Vlek, P.L.G.
    • Journal of the Korean Geographical Society
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    • v.44 no.2
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    • pp.122-145
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    • 2009
  • Terrain parameters calculated from digital elevation models (DEM) have become increasingly important in current spatially distributed models of earth surface processes. This paper investigated how the ability of upslope area for predicting the spatial distribution of soil properties varies depending on the selection of spatial resolutions of DEM and algorithms. Four soil attributes from eight soil-terrain data sets collected from different environments were used. Five different methods of calculating upslope area were first compared for their dependency on different grid sizes of DEM. Multiple flow algorithms produced the highest correlation coefficients for most soil attributes and the lowest variations amongst different DEM resolutions and soil attributes. The high correlation coefficient remained unchanged at resolutions from 15 m to 50 m. Considering decreasing topographical details with increasing grid size, we suggest that the size of 15-30 m may be most suitable for soil-landscape analysis purposes in our study areas.

The Structural and Functional Analysis of Landscape Changes in Daegu Metropolitan Sphere using Landscape Indices & Ecosystem Service Value (경관지수와 생태계용역가치를 활용한 대구광역도시권 경관의 구조적·기능적 변화 분석)

  • Choi, Won-Young;Jung, Sung-Gwan;Oh, Jeong-Hak;You, Ju-Han
    • Journal of the Korean Association of Geographic Information Studies
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    • v.8 no.4
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    • pp.102-113
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    • 2005
  • Ecosystem is composed of human, biotic and abiotic environment. Landscape is an ecosystem which appear in a unit region. These landscape are the spatiotemporal land mosaic which is combined with various landscape elements. And, land use and land cover changes are important factors of landscape structure changes. This study is mainly focused on the analysing the spatiotemporal change patterns of Daegu metropolitan sphere forest landscape, using landscape indices and Ecosystem Service Value (ESV) which quantify ecosystem structures and functions. The results of this study are as follow: The encroachment and fragmentation of forest were due to linear developments, i. e. road construction, rather than large-scale developments such as residental lands or industrial complexes. And, the core area percentages of landscape gradually decreased and these could possibly deteriorate the soundness of forest areas by reducing the core areas which are habitats of species. In addition, there was intimate relations between ESV and forest landscape area. The results of this study can be detached standards for impartial judgements between the logic of development & conservation, and basic standards for the establishment of development plans, i. e. metropolitan-plans, which are adequately reflected ecosystem value.

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An Analysis of Changes in Forest Fragmentation and Morphology in Surrounding Landscapes of Maeulsoops and Jinan-gun (진안군 마을숲 주변 산림의 파편화 및 공간 형태 변화 분석)

  • Kang, Wanmo;Koh, Insu;Park, Chan-Ryul;Lee, Dowon
    • Korean Journal of Environment and Ecology
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    • v.26 no.6
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    • pp.941-951
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    • 2012
  • The changes of forest habitats and maeulsoops(village forests) in Jinan-gun, Jeollabuk-do, South Korea are examined using landscape indices and morphological pattern analysis, and their landscape-ecological implications on conserving biological diversity are presented. We used FRAGSTATS and GUIDOS software, as well as land cover maps(of 1989 and 2006) to analyze the spatial and temporal patterns of habitat composition and configuration in surrounding landscapes of 34 representative maeulsoops and Jinan-gun. The results showed decreases in the amount of core habitats and corridors and habitat connectivity at a regional scale since 1989. In addition, multi-scale habitat analysis at a focal scale revealed that the structural and functional connectivity between forest habitats surrounding maeulsoops of the year 2006 was lower than that of the year 1989. In order to reduce forest fragmentation and to enhance the connectivity among habitats, it is necessary to provide the additional habitat corridors as well as preserving existing corridors and surrounding landscapes of maeulsoops. We also suggest that a combination of landscape indices and morphological spatial pattern analysis can provide an effective tool to assess the habitat functions and configuration in a rapidly changing landscape.

The Analysis of Coastal Landscape according to Development of Woljeong-ri Village in Jeju (제주 월정리 해안변 개발에 따른 해안경관 실태 분석 연구)

  • Seong, Da-Jeong;Park, Chung-Keun
    • Journal of the Regional Association of Architectural Institute of Korea
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    • v.20 no.6
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    • pp.33-40
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    • 2018
  • The coastal village in Woljeong-ri, Jeju is highly preferred by tourists because of its unique natural landscape different from inland areas. Especially, the number of buildings in the coastal area of the village is increasing due to escalating commercial value. Buildings are densely developed, along the seaside, resulting in privatization of coastal landscape. This results in blocking of landscape and psychological exchanges between the coastal village and coast. This study analyzed the actual conditions of coastal landscape before and after 2010, when the number of tourists and demand for development were increased in the coastal area of the coastal village in Woljeong-ri, Jeju. In this study, open index, visible horizontal index, elevation angle, elevation blockage and visible facade index were used to compute objective indicators of coastal landscape status. The analysis reveals visible facade index, a complex landscape assessment indicator, was increased by 7 times after 2010 as compared with before 2010. As such, there are many coastal villages in Jeju similar to Woljeong-ri that have a high landscape value and are in need of management. A comprehensive measure including a system for management of coastal landscape is urgently required to create narrative landscape in Jeju.

The Spatial and Temporal Analysis of Landscape Structure in Daegu Metropolitan Sphere (대구광역도시권의 시·공간적 경관구조 변화패턴 분석)

  • Choi, Won-Young;Jung, Sung-Gwan;Park, Kyung-Hun;Oh, Jeong-Hak;You, Ju-Han;Kim, Kyung-Tae
    • Journal of the Korean Association of Geographic Information Studies
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    • v.8 no.2
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    • pp.175-185
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    • 2005
  • Governmental authorities have been trying to develop our city in respect to the growth of economy and it is true that their developmental policies have negative effects on ecosystem without doubt. To estimate these negative effects, this study is mainly focused on analysing the usage of the land according to the urban growth, and the temporal and spatial patterns between the elements which consist of the landscape of Daegu Metropolitan Sphere, by using the GIS method and the landscape indices. The results of the this study are as follow; the urban areas widened for $193.4km^2$ due to the shift of the urban function, and the forest areas were encroached for $455.6km^2$ into other landcover patterns. It was the shift of the agriculture areas that are given the most influence in those procedures since those developmental conditions are relatively satisfactory. Moreover the forest areas are structurally fragmented into the complicated form, and also the patterns of adjacent patches are become complex. These transitions are regarded as causes of increased external interventions to the forest areas, and these could possibly deteriorate the soundness of forest areas by reducing the core areas which are habitats of species. In conclusion, the results of this study evaluate the influence of much broader urban development on environment structure around urban and mutual relationship between them. In addition, it can provide methods and basic informations for the establishment of metropolitan urban plan after due considerations of the landscape ecological principle.

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Changes in Landscape Characteristics of Stream Habitats with the Construction and Operation of River-Crossing Structures in the Geum-gang River, South Korea (금강에서 횡단구조물의 설치와 운영에 따른 하천 서식처의 경관 특성 변화)

  • Kim, Dana;Lee, Cheolho;Kim, Hwirae;Ock, Giyoung;Cho, Kang-Hyun
    • Ecology and Resilient Infrastructure
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    • v.8 no.1
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    • pp.64-78
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    • 2021
  • This study was conducted to find out the effect of the construction and operation of river-crossing structures on the habitat landscape characteristics in the Geum-gang River, South Korea. A total of three study reaches were selected in the downstream of the Daecheong Dam: the Buyong-ri reach, which is a control that is not affected by the construction and operation of the weir of the Four Rivers Project and Sejong-bo Weir reach and Gongju-bo Weir reach of the upper and lower sections of each weir that are affected by the weir construction and operation. The habitat type was classified, and then the structural characteristics of the landscape were analyzed using aerial photographs taken before and after the construction of the Daecheong Dam, before and after the construction of the weir, and before and after the weir gate operation. After the construction of Daecheong Dam in Geum River, the area of the bare land greatly decreased, and the area of grassland and woodland increased in the downstream of the dam. In addition, the patch number in the river landscape increased, the patch size decreased, and the landscape shape index and the habitat diversity increased. Therefore, after the construction of the dam, the bare land habitat was changed to a vegetated habitat, and the habitat was fragmented and diversified in the downstream of the dam. After the construction of the weirs, the area of open water increased by 18% in the Sejong-bo reach and by 90% in the Gongju-bo reach, and the landscape shape index of the open water decreased by 32% in the Sejong-bo reach and by 35% in the Gongju-bo reach, and the habitat diversity index decreased to 25% in the Sejong-bo reach and to 24% in the Gongju-bo reach. Therefore, the open water habitat was expanded, the shape of the habitat was simplified, and the habitat diversity decreased according to the construction of the weirs. After water-gate opening of the weir, the bare land that disappeared after the construction of the weir reappeared, and the landscape shape index and habitat diversity index increased in both terrestrial and open water habitats. Therefore, it was found that the landscape characteristics of the river habitats were restored to the pre-construction of the weir by the operation of the weir gate. The effect of weir gate opening was delayed in the downstream than in the upstream of the weir. Although the characteristics of the landscape structure in the river habitat changed due to the construction of the river-crossing structures, it is thought that proper technology development for the ecological operation of the structures is necessary as the habitat environments can be restored by the operation of these structures.

Community Analysis and Bological Water Quality Evaluation of Benthic Macroinvertebrate in Wangpi-cheon Watershed (왕피천 유역의 저서성 대형무척추동물 군집분석 및 생물학적 수질평가)

  • Park, Young-Jun;Jeon, Yong-Lak;Kim, Ki-Dong;Yoon, Hee-Nam;Nam, Sang-Ho
    • Korean Journal of Environment and Ecology
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    • v.27 no.3
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    • pp.327-343
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    • 2013
  • The aim of this study is to perform community analysis and biological assessment of water quality using benthic macroinvertebrate from Wangpi-cheon watershed which is defined as conservation areas of ecosystem and landscape by ministry of environment in Korea. Field survey of the study area was carried out 2 times from June to September in 2012. As a result of the field survey, total 155 species of benthic macroinvertebrates in 74 families, 15 orders, 7 classes and 5 phyla were collected. The findings of community analysis using the classified species and individuals showed relatively low DI(Dominant Index) value of 0.22 and very high value of average H'(Diversity index) as 4.24. And the analyzed results of SI(Similarity Index) according to habitat types using functional feeding groups showed higher values of 94.51% and 93.19% respectively to tributary and main stream after the designation of conservation areas of ecosystem and landscape. These results infer that various species and lots of individual are widely distributed at Wangpi-cheon watershed and stream ecosystem of the study area is healthy and well maintained after the designation of conservation areas. And also, the calculated EPT value was 62.9% as high enough to explain the cleanness of Wangpi-cheon watershed. We evaluated environmental condition and biological water quality by using ESB(Ecological Score of Benthic macroinvertebrate community) and KSI(Korean Saprobic Index). The average evaluated ESB shows very high value of 208.2, therefore Wangpi-cheon watershed is designated as 'First priority protection waters' area and the value of KSI is 0.32 which meets the saprobic water quality standard as 'First class'.

Classification of rural villages based on Landscape Indices - Focusing on Landscape Ecological Aspects - (경관지수를 활용한 농촌마을 유형분류: 경관생태학적 접근)

  • Kim, Han-Soo;Oh, Choong-Hyeon
    • Journal of Korean Society of Rural Planning
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    • v.17 no.3
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    • pp.1-13
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    • 2011
  • This study aims to analyse the landscape ecological characteristics of 39 rural villages in Korea and classify them according to their characteristics. After producing a land-use map of rural villages, this study quantified the landscape ecological characteristics of the subject sites as 18 landscape indexes using Fragstats. By applying the landscape index as a variable, selecting 4 factor through principal component analysis and conducting a cluster analysis, it classified them into 3 groups. Rural villages of Korea have their unique types of land-use due to the influence of physical environment such as geography, climate and ecology as well as the social and cultural influence, and the characteristics of land-use can be analysed and classified using the landscape index, the quantified landscape ecological characteristics.

Development and Application of Landscape Diversity Evaluation Model on the Basis of Rural and Natural Area (농촌 및 자연지역의 경관 다양성 평가모형 개발 및 적용)

  • Ra, Jung-Hwa;Lee, Yong-Eun;Cho, Hyun-Ju;Ku, Ji-Na;Kwon, Oh-Sung
    • Journal of the Korean Institute of Landscape Architecture
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    • v.41 no.6
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    • pp.84-95
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    • 2013
  • Recently, to prevent damage to the landscape, outstanding landscape areas have been designated in advance. In particular, as a fundamental way to evaluate landscape elements, landscape diversity is an important criterion to assess an area with a high conservative value. Therefore, the purpose of this study is to develop a quantitative evaluation model of landscape diversity based on landscape elements and to verify the model by applying it to the study sites. The assessment indicators derived from the literature analysis are topography, vegetation, land-use pattern, and unusual landscape. Topography diversity is subdivided into land undulation and land-form. Vegetation diversity is subdivided into plant community diversity and stratification diversity. To quantitatively analyse each indicator's diversity, SHDI was selected as the central metric. All of the quantitative measures were implemented by using the statistical tool, FRAGSTATS. Through the process of each indicator's standardization and summary, the final landscape diversity index was calculated. The results of the study are significant as it was the initial study of landscape diversity evaluation to seek applicability. However, the results of the Landscape Diversity Evaluation Model in this study based on 4 indicators synthetically demonstrate that more than one or two outstanding indicators can be underrated. Therefore, each 4 assessment indicator results should be considered individually. Furthermore, using the maximum value for each indicator's standardization reflects that it is necessary to analyse various examples to obtain higher objectivity later.