• 한국환경과학회지
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• 제1권1호
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• pp.19-33
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• 1992

The high oxidants, which occur the daily maximum concentrations in the afternoon, are transported into the other region via long range transport mechanisms or trapped within the shallow mixing boundary layer and then removed physically (deposition, transport by mountain wind, etc.) and chemically (reaction with local sources). Therefore, modeling formation of photochemical oxidants requires a complex description of both chemical and meteorolog ital processecs . In this study, as a part of air quality studies, we reviewed various aspects of photochemical modeling on the basis of currently available literature. The result of the review shows that the model is based on a set of coupled continuity equations describing advection, diffusion, transport, deposition, chemistry, emission. Also photochemical oxidant models require a large amount of input data concerned with all aspects of the ozone life cycle. First, emission inventories of hydrocarbon and nitrogen oxides, with appropriate spatial and temporal resolution. Second, chemical and photochemical data allowing the quantitative description of the formation of ozone and other photochemically-generated secondary pollutants. Third, dry deposition mechanisms particularly for ozone, PAN and hydrogen peroxide to account for their removal by absorption on the ground, crops, natural vegetation, man-made and water surfaces. Finally, meteorological data describing the transport of primary pollutants away from their sources and of secondary pollutants towards the sensitive receptors where environmental damage may occur. In order to improve our present study, shortcomings and limitation of existing models are pointed out and verification Process through observation is emphasized.

• 대한원격탐사학회지
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• 제8권2호
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• pp.125-130
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• 1992

원격탐사와 지리정보시스템은 많은 분야에서 접목되어 활용되고 있다. 이러한 두 공간자 료처리시스템간에 자료의 이동방법에 관하여 두 가지 기법을 고찰하였다. 원격탐사자료를 이용하 여 자연자원을 정확하게 구분하는 데에는 어려움이 따른다. 그 정확도를 높이기 위해서는 보조자 료, 즉 디지타이즈된 지도 및 지형(고도)자료 등을 원격탐사자료와 결합하여 이용한다. 이러한 자 료를 이용하는 데에는 (1) 구분 전 층화와 (2)구분 후 정리 등의 두 가지 기법이 많이 쓰인다. 이 두 기법은 유용한 반면, 결정 규칙에 의존함으로써 다소 전문성이 결여된다.

• 한국지형학회지
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• 제24권1호
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• pp.1-12
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• 2017

Planting trees is a very common practice in the coastal dunefields of South Korea as a way to stabilize dune landscapes and protect inland residential areas from strong winds and blown sands. On the other hand, disturbing the original foredune environment may deteriorate the ability of coastal landsto recover from coastal erosion after storms, causing a retreat of coastline. However, there is little information of this sort on the surface of forested dunefields. Airborne LiDAR or drone-based mapping is not easily applicable in such areas. In this study, we developed a digital terrain model of Dasari dunefields, Chungnam Province, based on direct topographic surveys with real-time kinematic GPS and total stations. We also analyzed previous two aerial photographs taken in 1947 and 1966, in order to detect an older landforms of the dunefields. Results suggested that there have been little changes in geomorphology of the Dasari dunefields for the last 50 years, despite continued tree plantings. Today, there are remains of U-shaped structures such as blowouts and parabolic dunes in the dunefields.

• 한국태양에너지학회 논문집
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• 제31권2호
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• pp.37-46
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• 2011

The GWNU (Gangnung-Wonju national university) solar radiation model was developed with radiative transfer theory by Iqbal and it is applied the NREL (National Research Energy Laboratory). Input data were collected and accomplished from the model prediction data from RDAPS (Regional Data Assimilated Prediction Model), satellite data and ground observations. And GWNU solar model calculates not only horizontal surface but also complicated terrain surface. Also, We collected the statistical data related on photovoltaic power generation of the Korean Peninsula and analyzed about photovoltaic power efficiency of the Gangwon region. Finally, the solar energy resource and photovoltaic generation possibility map established up with 4 km, 1 km and 180 m resolution on Gangwon region based on actual equipment from Shinan solar plant,statistical data for photovoltaic and complicated topographical effect.

• International Journal of Contents
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• 제15권2호
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• pp.75-78
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• 2019

The Integration technique of combining the measurement method with the fine precision of the sensor collecting the satellite-based information to determine the displacement space is available to a variety of diagnostic information. The measurement method by a GNSS with the sensors is needed since there will always be occasional occurrence of natural disasters caused by various environmental factors and the surroundings. Such attempts carried out nationally by distributed torsional displacement of the terrain and facilities. The combination of the various positioning analysis of mm-class for the facility of main area observed is required constantly in real time information of the USN/IoT Smart sensors and should be able to utilize such information as a precisely fine positioning information for the precisely fine displacement of the semi-permanent main facilities. In this study, for the installation of the receiving system, the USN/IoT base line positioning are easily accessible for the target bridges. Transmitting hourly from the received data is also executed in real time using the wireless Wi-Fi/Bluetooth bridges and related facilities to automatically process a fine position displacement. The results obtained from this method can be analyzed by real-time monitoring for a large structure or facilities for disaster prevention.

• Entomological Research
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• 제48권6호
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• pp.540-549
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• 2018

Climate change due to global warming and changes in land use increase the development time and distribution, as well as the abundance, of mosquitoes, thereby negatively affecting human life and health. In this study, we investigated the habitat characteristics of mosquito occurrence sites in Danwon-gu, Ansan city, Korea, based on a daily record of civil pest complaints lodged at the Danwon-gu Community Health Center. We considered two types of factors (natural and artificial) known to affect mosquito occurrence. We confirmed a total of 554 cases of mosquito occurrence from March 2014 to August 2017. The total study area was $49.11km^2$, with urban areas constituting the largest proportion. Additionally, we investigated habitat preferences of mosquitoes in terms of terrain factors; generally, mosquitoes occurred at low elevations and on low slopes. Regarding the preference of oviposition sites, mosquitoes occurred at higher rates near streams and crops lands. The rate of mosquito occurrence tended to increase in areas with dense human populations. Regarding climatic factors, the rate of mosquito occurrence increased in areas with high temperature and low precipitation.

• 한국방재학회 논문집
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• 제8권5호
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• pp.155-161
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• 2008

도시유역은 자연하천유역에 비해 다른 유형의 홍수피해를 보여주고 있다. 최근에 불투수면적의 증가로 홍수도달시간의 감소와 높은 첨두유량의 발생을 가져오면서 도시홍수피해의 원인이 되고있다. 본 연구에서는 XP-SWMM모형을 적용하여 침수심, 침수 면적을 시간대별로 침수해석을 수행하였으며, 침수해석시 건물의 영향을 고려하였다. XP-SWMM모형의 보정 및 검증을 위해 두 개의 강우사상(2005.06, 2005.07)을 적용하였고, 하천 외수위의 변하는 HEC-RAS모형을 통해 산정하였다. 모의결과 실제 관측된 침수면적(21.41ha)에 비해 산정된 침수구역의 면적은 23.45%로서 9.5% 과다하게 모의되었다. 또한 XP-SWMM모형의 DTM(DigitalTerrain Model)을 구축하여 주요 시간대별 건물의 영향에 따른 침수범위를 분석하였다.

• Journal of Forest and Environmental Science
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• 제30권1호
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• pp.152-160
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• 2014

The purpose of this study is to investigate and analyze the physical characteristics and tranquility of the valleys located in Gangwon region. For this study we analyzed the field survey data 135 valleys using GIS. The elements for measurement of tranquility were divided into visual elements including terrain, objects, forest, water and auditory elements including noise. These elements were divided further into positive and negative factors. The weight of each element and item was calculated by applying the AHP method. The results of this study are as follows. The length of the valley ranged from 126 m to 17 km, and the elevation ranged from 40 m to 1,800 m. Type of mixed forest was common in the valleys. The depth of the water was over 20 cm in 83% of the total area and most of the water was in good condition in visual quality. Regarding the positive factors of tranquility, the weighted scores of the objects, waterfall sounds and visual transparence of the water were of relatively high value. Relatively high values were also shown in closed and curved topography in the landform, forest type and natural forests. In the negative factors, the weights of the objects and forest elements had high values. Within the facility groups, facility of the river produced a considerable negative. After applying the index of tranquility, the natural physical attributes affected the tranquility value, more than the manmade structures to a much greater degree.

• 자연과학논문집
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• 제13권1호
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• pp.97-111
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• 2003

본 연구는 가평스키장계획을 통해 스키슬로프의 계획기준을 살펴보는데 있다. 본 대상지는 경기도 가평군 하천리에 위치하고 있고 면적은 $1,594,001m^2$이다. 가평스키장의 설계목표는 본 부지에 가장 적합하고 경쟁력있는 스키코스를 설계하는데 있다. 설계과정은 먼저 부지조사와 분석, 설계프로그램의 지형분석의 종합, 슬로프계획, 타스키장과의 비교를 통한 특화계획 등을 포함한다. 본 스키장은 총 슬로프연장 8,738m이고 5기의 리프트와 10개의 스키슬로프로 조성되며 2개의 중급자, 3개의 중상급자, 4개의 상급자, 1개의 최상급자코스로 구성된다. 가평스키장은 모글이나 하프파이프같은 특화된 스키장으로서 상급자와 보더전용의 스키장으로 개발전략을 수립한다.

• 한국환경복원기술학회지
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• 제20권4호
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• pp.15-28
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• 2017

A protected area means a space designated and protected by law from development pressure and environmental pressure. It is mainly designated to protect specific ecosystems, natural landscapes, and cultural resources from irrational development (or damage), and involves policies of the public sector such as central and local governments. The United Nations Educational, Scientific and Cultural Organization (UNESCO) has conducted conservation and restoration projects for preserving natural ecosystems and genetic resources. In order to conserve the ecosystem in the protected area, national and public organizations purchase private land and use it ecologically; in addition, ecological restoration project is carried out for the purpose of creating waterside ecological belt or preserving ecosystem. Land acquisition refers to the land where highly influenced by the water quality and need to restore, and purchased by negotiating with the landlord. Although the nation and public institution carried out ecosystem restoration project for partial purchase land in order to conserve ecosystem, it is below the expected effect due to lack of comprehensive management system and have some problems in restoration project and unification of management institutions. Land acquisition in Donggang River Basin Ecological Conservation area is initiated in 2005 for creating income of local residents and ecological restoration. However, the lack of overall management and awareness resulted in poor vegetation growth and poor response by local residents due to terrain exposure. As such, there is insufficient research on the current situation and systematic integrated management although the number of land acquisition is increasing year after year. Futhermore, overall recognition and follow-up monitoring of eco-restoration are still inadequate. Therefore, the survey on the awareness of the purchase land ecosystem restoration project is necessary for the efficient restoration project and establishment of the management strategy for land acquisition in the future. Therefore, in this study, we provide fundamental materials on further research projects by carrying out research on the awareness of ecological restoration projects in the Donggang River basin ecological preservation area.