• Journal of the Korean Association of Geographic Information Studies
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• v.8 no.3
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• pp.121-128
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• 2005

Forest fire is expanded to large-scale forest fire based on topographic characteristics, particularly slope. This report addresses the currently available methods of calculation slope angle from a digital elevation model and develops a new method that circumvents a number of the shortcomings associated with other algorithms. The results of the comparison of five different slope angle calculation algorithms show that maximum uphill slope angle calculation is the proper method for the purpose of predicting forest fire hazard.

• Proceedings of the Korea Water Resources Association Conference
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• 2006.05a
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• pp.1131-1134
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• 2006

우리나라는 최근 기상변동에 따른 집중호우와 태풍의 영향으로 풍수해 피해지역 및 재산피해액이 증가하고 있다. 이러한 풍수해 피해를 경감시키기 위해 많은 연구와 노력이 계속되고 있다. 최근에는 지리정보시스템을 이용하여 시간적, 공간적 분석을 통해 홍수범람지도 등을 작성하여 홍수 피해를 최소화 하려고 노력을 하고 있다. 본 연구에서는 지리정보시스템을 이용한 홍수범람 수심의 분포 및 범람면적 등을 산정하기 위해 HEC-GeoRAS와 HEC-RAS를 연계하여 IHP 대표시험유역으로 운영중인 금강수계 보청천유역내 삼가천 지류인 적암천에 적용하였다. 유역의 유출분석 후 ArcView와 HEC-GeoRAS를 통하여 지형학적인 인자와 요소들을 추출하고 실측자료와 비교하였으며, 빈도별 홍수량에 대한 하천의 빈도분석 후 홍수위 및 빈도별 홍수 위에 따른 피해 면적 산정 후 GIS System을 이용하여 홍수범람위험 지역을 결정하였으며 산정된 기본자료는 유역의 홍수발생시 인명과 재산 피해에 대비한 홍수범람 지도 및 홍수재해 지도 제작에 도움이 될 것으로 판단된다.

• Journal of Wetlands Research
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• v.14 no.3
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• pp.317-328
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• 2012

The objects of this study are to perform appropriateness analysis of USLE(universal soil loss equation) model and to accumulate the data measured in field. The basin area of Bongdong station is $342.27km^2$. This study simulated sediment outflows in the basin and performed a comparative analysis of simulated outputs with actual measurement values. Also annual rainfall was used to calculate rainfall-runoff erosivity factor which can influence soil erosion. The calculation of annual average soil erosion was made by soil erosion maps. The maps with a resolution of ($30m{\times}30m$) were created by multiplication of factors(R, LS, K, C, P) from ArcView Map Calculator. In this paper, it was shown that soil erosion was not occur in the most of basin.

• Journal of the Economic Geographical Society of Korea
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• v.16 no.2
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• pp.233-246
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• 2013

This paper investigates both the spatial patterns of aging population and its formal regional structure in 2010. The results are as follows: first, aging index shows high values in remote mountainous and coastal regions while showing relatively low values in Capital Region and large provincial cities. Aging index has low negative correlation with such variables as population increasing rate, ratio of youth population, ratio of apartments, and ratio of newly built housing. However, aging index shows high positive correlation with variables including ratio of single unit house, ratio of aged peoples' house ownerships, ratio of welfare recipients, ratio of old housing, and number of public healthcare facilities. Secondly, four factors are identified from factor analysis including aging factor, welfare factor, economic vitality factor, and new town factor. The aging level of a region is negatively related to the strong level of those factors. Thirdly, cluster analysis results in four different types of formal regions including rural mountainous coastal type, rural non-capital region type, large metropolitan type, and provincial industrial city type.

• Journal of the Korean Geographical Society
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• v.47 no.4
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• pp.514-521
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• 2012

In this paper, three general academic issues in Korean biogeographical studies were comprehensively reviewed: 1) relationship between environmental factors and plant distribution, 2) past vegetation and climate 3) interaction between humans and environment. Biogeography in Korea is poorly developed field and has been generally ignored by geographers in Korea. The future for biogeography in Korea however seems promising and Korean biogeographers have a great opportunity to develop their field. To attract more prospective graduate students into biogeography and train them would be very important for the gradual and persistent development of geographical biogeography in Korea.

• 한국지형공간정보학회:학술대회논문집
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• 2004.10a
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• pp.17-21
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• 2004

본 연구의 목적은 GIS 분석기법에 의해 적조의 발생시기와 생물학적, 해양학적인 인자를 통해 적조의 발생 가능한 시-공간적인 분포를 분석하는 적조정보시스템의 개발이다. 적조의 발생은 1994년까지 남해안에서 산발적으로 일어났다. 그러나 1995년 이후로 남해안과 동해안 전 해역에 걸쳐서 빈번히 광역적인 범위로 적조가 발생하고 있다. 따라서 적조 연구 분야도 최근 중요한 변화가 이루어졌다. 적조 모니터링을 위한 원격탐사, GIS, 퍼지 모델 시스템 등과 같은 다양한 기술 분야가 수행 되었다. 본 연구에서는 국내 연안에서 발생한 적조의 발생 범위와 적조 생물, 그리고 해양환경 요소 등을 하나의 지리정보시스템 기반에 의한 적조정보시스템으로 구축하기 위해 각각의 자료를 데이터베이스화하고 적조발생의 공간적 분포를 분석하는데 필요한 자료의 구축 방안을 제시하였다.

• Journal of the Korean Association of Geographic Information Studies
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• v.10 no.1
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• pp.169-182
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• 2007

The purpose of this study is to assess the urban amenity on physical environmental factors, and to verify the effectiveness of the amenity map using correlation analysis of the environmental quality. The physical environmental factors were set to 4 items of green space, landscape, water environment and land use, and the items were composed of 11 detail factors. Based on the factors, GIS maps were constructed and the amenity map was produced using overlay analysis. The results of this study are as follow; the proportion of 1~2 ranks was 40.8% of total area around Dalseong-gun, Dong-gu, Suseong-gu. The lower 6~7 ranks in the amenity assessment was 5.7% of total area around Jung-gu, Seo-gu, Dalseo-gu. According to the results of correlation analysis between the amenity and environmental observed data, $SO_2$ among the air pollution material had a negative correlation with amenity(r=-0.649, p<0.05). In case of water pollution, TN and TP had the negative correlations with amenity (r=-0.643, P<0.01; r=0.642, p<0.01).

• Journal of the Korean Association of Geographic Information Studies
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• v.5 no.4
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• pp.9-23
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• 2002

The purpose of this research was to develop a model that minimizes time and money for deriving topographical property factors and hydro-meteorological property factors, which are used in interpreting flood flow, and that makes it possible to forecast rainfall-runoff using a least number of factors. That is, the research aimed at suggesting a runoff interpretation method that considers the river branching characteristics but not the topographical and geological properties and the land cover conditions, which had been referred in general. The subject basin of the research was the basin of Yeongcheon Dam located in the upper reaches of the Kumho River. The parameters of the model were derived from the results of abstracting topological properties out of rainfall-runoff observation data about heavy rains and Digital Elevation Modeling(DEM). According to the result of examining calculated peak runoff, the Clark Model and the GIUH Model showed relative errors of 1.9~23.9% and 0.8~11.3%, respectively and as a whole, the peak values of hydrograph appeared high. In addition, according to the result of examining the time when peak runoff took place, the relative errors of the Clark Model and the GIUH Model were 0.5~1 and 0~1 hour respectively, and as a whole, peak flood time calculated by the GIUH Model appeared later than that calculated by the traditional Clark Model.

• Journal of Korean Society of Forest Science
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• v.80 no.3
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• pp.265-278
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• 1991

The purpose of this study is to suggest objective basic data for the design and management of the national park roadside slopes through the quantitative analysis of the visual quality included in the physical environment of the Chi-ri national park, for this, visual volumes of physical elements have been evaluated by using the mesh analysis, spatial images structure of physical elements have been analyzed by factor analysis algorithm, and degree of visual quality have been measured mainly by questionnaires. Result of this thesis can be summarized as fallows. Visual volumes of the naked, rock, ground cover of seed spray, and artificial planting are found to be the main factor determining the visual quality. Factors covering the spatial image of the national park roadside slopes landscape have been found to be the overall synthetic evaluation, spatial, appeal, physical, openness and dignity factors such as the overall the spatial, physical and openness yield high factor scores. As for the factors determining the degree of visual quality of the roadside slopes, variables such as the summit, the constructions management, harmony of landscape, visual stability of roadside slopes, suitable artificial planting and suitable constructions.

• Journal of the Korean Association of Geographic Information Studies
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• v.21 no.1
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• pp.46-56
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• 2018

This paper aimed to identify main factors of community characters, which have an effect on the land surface temperature(LST) change and estimate the impacting coefficient(ratio) of factors in a significant level of statistics. Chungcheongbuk-do province was selected and then partitioned into city and county areas for the sake of convenience of modeling. LST time series data and the community character data were developed based on Terra Satellite MODIS data and collected from the National Statistical Office, respectively. By the cause and effect relationship between community characters and LST, regression coefficients were estimated using a penal model. In a panel modeling, LST and community characters were used as a dependent variable and explanatory variables, respectively. Panel modeling analysis was carried out using statistical package STATA14 and one-way fixed effect model was selected as the most suitable model to evaluate the regression coefficients in the study area. The impacting ratio of LST change by any explanatory variable derived from the regression coefficients of the panel model fixed. Impacting ratios for industrial areas, elevation ${\times}$ building, energy usage, average window speed, non-urban management area, agricultural, nature and environmental conservation, average precipitation were 3.746, 2.856, 2.742, 0.553, 0.102, 0.071 and 0.003, respectively.