• 제목/요약/키워드: mountain system

검색결과 595건 처리시간 0.021초

산지차수를 이용한 산지의 분류 및 명명 체계의 제안 (A Suggestion on the System of Mountain Classification and Nomenclature using the Mountain Orders)

  • 손일
    • 대한지리학회지
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    • 제46권2호
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    • pp.115-133
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    • 2011
  • 야마다의 산지차수구분법은 상향식으로 정의할 수 있는데, 이는 저차수 산지들이 모여 점차 차상위차수 산지를 이룸과 동시에 산지의 영역과 규모가 확대되기 때문이다. 하지만 산지를 총체적으로 이해하고 각종 산지 정보를 체계적으로 관리하기 위해서는, 특정 규모의 산지를 이루는데 기여한 차하위차수 산지만을 강조하는 야마다의 산지구분법에는 한계가 있다. 왜냐하면 상위차수 산지내에는 차하위차수 산지뿐만 아니라 독립된 차차하위, 차차차하위 산지도 포함되어 있기 때문이다. 이와 같은 문제점을 해결하기 위해 본 연구에서 제시된 산지분류법은 기본적으로 하향식이다. 여기서 하향식이란 최고위차수 산지를 구성하는 차하위차수 산지, 다시 이를 구성하는 차차하위차수 산지로 산지를 세분해나가 최종적으로 2차수 산지를 구성하고 있는 1차수 산지까지 분류해 나가는 것을 의미한다. 본 연구에서는 야마다 산지차수구분법을 근간으로 특정 산체를 구성하고 있는 모든 산지 요소를 체계적으로 분류하고 구분된 산지에 대한 새로운 명명법을 제시함으로써 산지정보의 종합적 체계적 관리를 위한 데이터베이스의 근간을 마련했다.

Directed Diffusion을 이용한 등산객 경로추적 시스템 설계 및 성능 분석 (Design and Performance Analysis of Mountain Climber Tracking System Using Directed Diffusion)

  • 김광호;이구연;정충교
    • 산업기술연구
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    • 제27권B호
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    • pp.53-58
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    • 2007
  • In this paper, we propose a design of the implementation for a search and rescue system for mountain climbers and evaluate the performance of the system. Search and rescues of people in emergency situations in mountain areas have been difficult due to lack of information about their location. In the proposed design, several small and commonly-available RF-based sensors, some amount of storage and processing devices are used. Infestations offer geographically intermittent coverage at high speeds. The proposed mountain climber tracking system use the directed diffusion scheme combined with infostation system. We also analyze the performance of the proposed system with NS-2 simulation package. From the performance analysis results, we expect that the proposed system will be very useful to early detect climbers' locations in emergency situations in Korea mountain areas.

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산지하천도로 재해지도 작성을 위한 SW 개발 (Development of Hazard Prediction Map S/W for Mountain River Road)

  • 장대원;양동민;김기홍
    • 한국재난관리표준학회지
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    • 제2권1호
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    • pp.75-80
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    • 2009
  • 본 연구는 최근 빈발하는 집중호우 및 국지성 호우로 인한 토석류, 산사태, 유송잡물 등 산지하천도로의 피해 를 유발시키는 다양한 재해유형에 대한 예측지도를 작성하는 연구로서, GIS 기반의 산지하천도로재해정보 시스템을 구축하는 연구이다. 본 연구는 강원도를 대상으로 산지지역에서의 재해위험을 분석하기 위한 프로토콜을 개발하여, 그 적정성을 검토하고 향후 산지하천도로 재해예측지도 작성 SW 구축을 위하여 필요한 DB 및 표출 방안을 검토하였다.

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A study of low-temperature and mountain epilithic diatom community in mountain stream at the Han River system, Korea

  • Kim, Yong Jin;Lee, Ok Min
    • Journal of Ecology and Environment
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    • 제41권8호
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    • pp.213-222
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    • 2017
  • Background: This study was conducted to assess the physicochemical water quality and the altitudinal distribution of low-temperature and mountain epilithic diatom (LTMD) community in Buk and Hangae streams that are located in Seorak Mountain with the height of 1708 m in Korea. And the community characteristics of LTMD found in the Buk and Hangae streams were compared to that of LTMD from the Han River system. Results: The physicochemical water qualities of Buk and Hangae streams were determined to be very clean. As a result of analyzing the community composition, 135 taxa of epilithic diatoms were determined, and 22 taxa appeared including Hannaea arcus var. subarcus which are known to have low-temperature and mountain ecological characteristics in the literatures. The relative frequencies of LTMD were 37.0~0.9% range from the upper to lower regions. Although Diatoma tenuis, Eunotia minor, and Gomphonema affine are known to be ubiquitous in streams and lakes, in this research, the three taxa were added into low-temperature and mountain epilithic diatom, since D. tenuis and E. minor appeared only in altitudes above 600 m, and G. affine had the highest relative frequency during spring and fall in altitudes above 700 m, when water temperature was around $10^{\circ}C$. Conclusions: Among the 24 taxa of low-temperature and mountain epilithic diatom (LTMD) (including the 3 taxa added in this study), 14 taxa (Diatoma hyemalis, D. mesodon, D. tenuis, Hannaea arcus, H. arcus var. subarcus, Ulnaria inaequalis, Eunotia bilunaris, E. implicata, E. minor, E. muscicola, E. silvahercynia, E. septena, Delicata delicatula, and Gomphonema affine) represented the characteristics of LTMD very well; they grow best in water temperatures below $15^{\circ}C$ in Buk and Hangae streams and Han River system.

A Simple Simulation of Parabola-Shaped Clouds in the Lee of a Low Bell-Shaped Mountain Using the ARPS

  • Lee, Seung-Jae;Lee, Hwa-Woon;Kang, Sung-Dae
    • 한국환경과학회지
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    • 제16권5호
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    • pp.541-548
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    • 2007
  • A three-dimensional linear model and the Advanced Regional Prediction System (ARPS) were used to simulate parabola-shaped disturbances and clouds in the lee of a bell-shaped mountain. The ARPS model was compared in the x-y plane against the linear model's analytic solution. Under similar conditions with the linear theory, the ARPS produced well-developed parabola-shaped mountain disturbances and confirmed the features are accounted for in the linear regime. A parabola-shaped cloud in the lee of an isolated bell-shaped mountain was successfully simulated in the ARPS after 6 hours of integration time with the prescribed initial and boundary conditions, as well as a microphysical scheme.

Statistical Characteristics of Local Circulation Winds Observed using Climate Data in the Complex Terrain of Chilgok, Gyeongbuk

  • Ha-Young Kim;Soo-Jin Park;Hae-Dong Kim
    • 한국환경과학회지
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    • 제32권5호
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    • pp.375-384
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    • 2023
  • Climate data were obtained over an eight-year period (July 2013 to June 2021) using an automatic weather observation system (AWS) installed at the foot of Mt. Geumo in Chilgok, Gyeongbuk. Using climate data, the statistical and meteorological characteristics of the local circulation between the Nakdong River and Mt. Geumo were analyzed. This study is based on automatic weather observation system data for Dongyeong, along with comparative climate data from the Korea Meteorological Administration (Chilgok) and the Gumi meteorological observatory. Over the eight- years, mountain and valley winds have occurred 48 times a year on average, with the highest occurring in May and the weakest winds in June and December. When mountain winds occurred, the temperature in the nearby lowland region more strongly decreased than when valley winds blew. However, the potential to use mountain winds to improve urban thermal environments is limited because mountain winds occur infrequently in summer when a drop in nighttime temperature is required.

스키장안에 위치한 산악비행장의 특성분석 (The Analysis of characteristics of Mountain Aerodromes in the ski stations)

  • 신대원;신홍철
    • 한국항공운항학회지
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    • 제20권2호
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    • pp.39-46
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    • 2012
  • Mountain Aerodromes are aerodromes with special characteristics, provided in mountains for the needs of air transport operations. Mountain Aerodromes are approved for restricted use and are reserved for pilots and aircrafts special requirement. In this study, we surveyed the operating system and the characteristics of the Mountain Aerodromes in the ski stations of the French Alps mountainous region. We introduced the necessity and the relevant regulations for Mountain Aerodromes in Korea.

통합정보제공을 위한 공간정보 기반의 국내 능선축 구축 (An Integrated Information Distribution System for Mountain Ridgelines Using Spatial Information)

  • 이명진;이수재;이창연
    • 한국지리정보학회지
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    • 제17권2호
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    • pp.107-120
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    • 2014
  • 본 연구는 공간정보를 활용하여 국내 능선축을 구축하고, 주변 자연환경의 기초정보를 분석하여 관련 정보의 통합 제공체계를 구축하는 것이다. 이를 위하여 첫째, 국내 능선축(대간, 정맥, 지맥 및 기맥)을 공간정보로 구축하고 정립하였다. 둘째, 국내 능선축의 원류 및 분기 등의 현황을 체계적으로 분석하기 위하여 코드화를 수행하였다. 셋째, 기 구축된 능선축 주변의 자연환경(지형정보, 생태 자연도 및 국토환경성평가지도) 관련 공간정보를 활용하여 현황을 분석하였다. 넷째, 전술된 3가지 정보를 통합하여 활용하는 방안으로 Web GIS 기반의 능선축 통합정보제공 체계를 제안하고 기본 기능을 도출하였다. 지맥 및 기맥과 같은 능선축의 구축은 기존의 대간 및 정맥의 구축과정보다 세밀히 분석해야 하기 때문에 구축방법을 보다 개선하여 정확도를 높였다. 국내 능선축을 길이에 따라서 5개의 등급으로 구분하였으며, 능선축 자체의 연결된 현황 파악을 위하여 백두대간을 기반으로 분류체계를 코드화 하여 전체 능선축에 적용하였다. 또한 능선축 주변을 거리에 따라서 핵심, 완충, 중점으로 3가지 구분하고 주변의 기초 자연환경을 분석하였다. 이를 바탕으로 능선 축 관련 정보를 효율적으로 활용하기 위한 기본 방안을 제시하였다. 본 연구에서는 기존에 정규화 되지 못했던 국내 능선축을 공간정보를 활용하여 정리하고 분석하였다. 이를 바탕으로 능선축 관련 정보를 효율적으로 활용하기 위한 방안을 모색하기 위한 연구라고 할 수 있다.

Running safety of metro train over a high-pier bridge subjected to fluctuating crosswind in mountain city

  • Zhang, Yunfei;Li, Jun;Chen, Zhaowei;Xu, Xiangyang
    • Structural Engineering and Mechanics
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    • 제76권2호
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    • pp.207-222
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    • 2020
  • Due to the rugged terrain, metro lines in mountain city across numerous wide rivers and deep valleys, resulting in instability of high-pier bridge and insecurity of metro train subjected to fluctuating crosswind. To ensure the safe operation in metro lines in mountain cities, running safety of the metro train over the high-pier bridge under crosswind is analyzed in this paper. Firstly, the dynamic model of the wind-train-bridge (WTB) system is built, in which the speed-up effect of crosswind is fully considered. On the basis of time domain analysis, the basic characteristics of the WTB system with high-pier are analyzed. Afterwards, the dynamic responses varies with train speed and wind speed are calculated, and the safety zone of metro train over a high-pier bridge subjected to fluctuating crosswind in mountain city is determined. The results indicate that, fluctuating crosswind triggers drastic vibration to the metro train and high-pier bridges, which in turn causes running instability of the train. For this reason, the corresponding safety zone for metro train running on the high-pier is proposed, and the metro traffic on the high-pier bridge should be closed as the mean wind speed of standard height reaches 9 m/s (15.6 m/s for the train).