• Proceedings of the Korea Water Resources Association Conference
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• 2012.05a
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• pp.382-386
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• 2012

최근 산지하천 유역에서 발생하는 홍수와 이를 동반한 토석류에 의해 많은 인적, 물적 피해가 빈번히 발생하고 있다. 이러한 피해를 최소화하기 위해서는 유역의 정확한 홍수유출량 해석이 동반되어야 하지만 산치하천 유역은 유출특성 분석에 기본이 되는 수위관측소의 수가 적고, 관측소가 존재하더라도 결측치가 많거나 자료보유 연한이 짧아 자료의 활용성이 떨어진다. 따라서 선행 연구에서는 미비한 자료만으로도 회귀분석이 가능하며 높은 신뢰도를 갖는 Fuzzy 회귀분석 기법을 도입하여 수위자료 없이도 산지하천 유역의 유역면적과 하도경사를 바탕으로 홍수유출량을 평가할 수 있는 기술을 개발하였다. 본 연구에서는 여기에 빈도별 강우량을 새롭게 추가하여 홍수량 산정식을 개선 및 보완하였다. 새롭게 도출된 홍수량 산정식의 정확도는 기존 대상유역 내 특정지점 설계홍수량을 기준으로 기존 개발된 홍수량 산정식과 비교하여 검토하였고 비교적 높은 정확도를 나타냈다. 이를 바탕으로 일반 사용자도 손쉽게 홍수량을 산정할 수 있도록 MATLAB을 이용하여 홍수량 산정 프로그램을 개발하였다.

• Journal of the Korean Association of Geographic Information Studies
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• v.19 no.1
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• pp.12-29
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• 2016

The purpose of this study was to improve forestland characteristic evaluation system's indicators for rational development and ecosystem conservation. There has been no consideration for statistical duplication between variables, and it caused inefficient data collection. Furthermore, the same evaluation criteria were applied for all forestlands without considering regionally different characteristics, and it made variation for designation cancel rates of preservation semi-preservation forestlands between cities. To solve these problems, we first removed 'DBH' variable which has a multicollinearity. Second, we applied standard normal distribution for each forest watershed type. As a result of eliminating 'DBH', the numbers of parcels for all grades except A were changed but their numbers and areas were not large enough to consider the change of total score. For the output of analyses with the existing same regional criteria, the total scores of urban type and urban-fringe type forestlands were higher than those of other types. The numbers of parcels for A and B were increased and those for C and E were decreased by applying standard normal distribution. This caused the increase of preservation-oriented parcels. Finally, we suggested a new evaluation method based on standard normal distribution to consider regional forest characteristics and to solve regional imbalance.

• The Journal of Engineering Geology
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• v.27 no.2
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• pp.125-132
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• 2017

Approximately 64 percent of Korean territory is covered with mountains, and there is occurred a continuous mountain disaster such as landslide, debris flow and slope failure around mountain slopes due to heavy rainfall and typhoon in the summer season. Even in such a reality, the development of mountain areas is being carried out through the development and expansion of social infrastructures centered on mountain areas, but systematic management is insufficient. Constructions of a forest road facility for mountain slopes can be a cause of mountain disasters intensively in the summer season due to artificially changing the mountain area. In this unstable mountain environment, efforts to build a disaster-resistant environment are urgently needed. This research is to analyze the stability of mountain slopes according to soil depth (1~5 m) and mountain slope ($20{\sim}60^{\circ}$) considering the characteristics of rainfall infiltration under extreme rainfall conditions. As a result, the stability of the mountain slope was found to be different according to the depth of soils and the saturation area of the soil layer. As well as the stability of the mountain area was found to be lower than that of the natural mountain area. Specially, rainfall infiltration occurs at the upper slope of the forest road. For this reason, the runoff phenomenon of rainfall infiltration water occurs clearly when the depth of soil layer is low.

• Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
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• v.17 no.2
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• pp.153-160
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• 1999

On this study, We apply terrain analysis method using DTM(Digital Terrain Model) to mountainous district development to present the example of terrain-change modeling when we develop mountainous district, and the landscape-change modeling which is geographically referenced when a large scale utility was constructed on mountainous district. Finally, we present an one way which raise a efficiency of national land use and future oriented, environmentally friendly national land development.

• Journal of the Korean Institute of Landscape Architecture
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• v.40 no.1
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• pp.34-42
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• 2012

This study aims to suggest the secure indicator of parks and green areas according to the properties of the location. There were 31 study areas where negotiation was finalized from 2001 to 2008. The location types were divided by land use type before development and the ratio of mountainous and constructed parks, the ratio of green change and so forth were analyzed according to the those types. As a result, location types were classified into mountainous type, arable land type, urban district type. In terms of locational property, even though the ratio of parks and green areas was the highest at 24.9% in arable land type, the ratio was not much different from the others. Mountainous type depends on the ratio of mountainous park with 10.5%, and arable land type, and urban district type has high ratio of constructed parks. And, the ratio of green change arable land type is degraded by 32.8% and the ratio of mountainous green change is serious in the mountainous type. As a result of the selection of negotiation indicator, arable land type is closely related to the ratio of parks and green areas and the ratio of green change; mountainous type, the ratio of park and green, the ratio of mountainous green change and the ratio of constructed park and green; urban district type, the ratio of green areas.

• Magazine of the Korean Society of Agricultural Engineers
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• v.28 no.3
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• pp.5-6
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• 1986

• Journal of Korean Society of Rural Planning
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• v.5 no.1 s.9
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• pp.3-11
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• 1999

• Journal of Korean Society of Forest Science
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• v.58 no.1
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• pp.75-76
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• 1982

• Journal of Korean Society of Forest Science
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• v.58 no.1
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• pp.80-81
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• 1982

• Proceedings of the Korean Association of Geographic Inforamtion Studies Conference
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• 1998.11a
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• pp.1-8
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• 1998