GIS 및 USLE를 이용한 연 토사침식량 산정에의 LS 인자 영향분석

정휘철(Jung Hui-Cheul),장종경(Jang Jong-Kyung),신현석(Shin Hyun-Suk) 대한토목학회 2000 대한토목학회 학술발표회 논문집 Vol.2000 No.3

기후변화에 따른 우리나라 특산식물의 잠재적 분포적지 변화 예측 -모데미풀을 중심으로-

이상혁 ( Sang Hyuk Lee ),정휘철 ( Hui Cheul Jung ),최재용 ( Jae Yong Choi ) 한국환경복원기술학회 2012 한국환경복원기술학회지 Vol.15 No.3

The importance of the genetic value of native plants has been raised recently after the adoption of Nagoya Protocol. In this stream, this research focused on the future distribution of Megaleranthis saniculifolia which has been evolved and adapted to Korean natural environment and classified as an endemic endangered species by IUCN. The distribution of the species in future are projected based on ``present potential distribution area`` by adopting SRES (Special Report on Emission Scenarios) A1B climate change scenario using 6 types of GCM (General Circulation Model). The major results of the research are as follows:habitats of Megaleranthis saniculifolia. (1) will be reduced by 44% nation wide; (2) in Chungcheongngnam Do and Jeollanam Do will be the most affected; and (3) in high altitude in Chungcheongbuk Do, Gyunggi Do and Gangwon Do will be relatively less affected.

연구논문(硏究論文) : 앙상블 기후 시나리오 자료를 활용한 우리나라 잣나무림 분포 적지 전망

김재욱 ( Jae Uk Kim ),정휘철 ( Hui Cheul Jung ),전성우 ( Seong Woo Jeon ),이동근 ( Dong Kun Lee ) 한국환경복원기술학회 2015 한국환경복원기술학회지 Vol.18 No.2

Preparations need to be made for Korean pine(Pinus koraiensis) in anticipation of climate change because Korean pine is an endemic species of South Korea and the source of timber and pine nut. Therefore, climate change adaptation policy has been established to conduct an impact assessment on the distribution of Korean pine. Our objective was to predict the distribution of Korean pine while taking into account uncertainty and afforestation conditions. We used the 5th forest types map, a forest site map and BIOCLIM variables. The climate scenarios are RCP 4.5 and RCP 8.5 for uncertainty and the climate models are 5 regional climate models (HadGEM3RA, RegCM4, SNURCM, GRIMs, WRF). The base period for this study is 1971 to 2000. The target periods are the mid-21st century (2021-2050) and the end of the 21st century (2071-2100). This study used the MaxEnt model, and 50% of the presences were randomly set as training data. The remaining 50% were used as test data, and 10 cross-validated replicates were run. The selected variables were the annual mean temperature (Bio1), the precipitation of the wettest month (Bio13) and the precipitation of the driest month (Bio14). The test data``s ROC curve of Korean pine was 0.689. The distribution of Korean pine in the mid-21st century decreased from 11.9% to 37.8% on RCP 4.5 and RCP 8.5. The area of Korean pine at an artificial plantation occupied from 32.1% to 45.4% on both RCPs. The areas at the end of the 21st century declined by 53.9% on RCP 4.5 and by 86.0% on RCP 8.5. The area of Korean pine at an artificial plantation occupied 23.8% on RCP 4.5 and 7.2% on RCP 8.5. Private forests showed more of a decrease than national forests for all subsequent periods. Our results may contribute to the establishment of climate change adaptation policies for considering various adaptation options.

LANDSAT영상을 이용한 서울시 행정구역 단위의 열섬효과 분석

이경일,류지은,전성우,정휘철,강진영,Lee, Kyung Il,Ryu, Jieun,Jeon, Seong Woo,Jung, Hui Cheul,Kang, Jin Young 대한원격탐사학회 2017 大韓遠隔探査學會誌 Vol.33 No.5

도시화로 인한 산업비율 증가는 도시의 기온이 주변지역보다 높아지는 도시 열섬(Urban Heat Island)현상을 유발하였으며 기후변화와 함께 그 강도가 점점 증가하고 있다. 열섬현상이 발생하는 여러 도시 중에서도 서울시는 각 구 또는 동별로 시가화 정도, 녹지율, 에너지소비량, 인구밀도가 다 다르기 때문에 열섬현상의 강도역시 다르다. 따라서 본 연구에서는 서울특별시를 대상으로 행정구, 행정동 단위 열섬현상강도(UHI Intensity)를 추출하여 행정구역별 차이를 확인하고 세 가지 범주(기상상태, 인위적 열 발생, 토지이용특성)에 포함되는 변수들과 선형회귀분석을 실시하여 각 행정구역의 열섬현상강도 차이의 원인을 살펴보았다. 분석결과 UHI Intensity는 행정구별, 행정동별 특징 및 주변 환경에 따른 차이가 존재하며 행정동 단위에서 차이가 더 크게 나타났고 구의 UHI Intensity와 구에 속한 동의 UHI Intensity분포 또한 차이가 존재하였다. 선형회귀분석결과 평균 풍속, 개발정도, 토양보정식생지수(SAVI), 정규화시가지지수(NDBI) 값이 행정구역별 열섬현상강도 차이를 발생시키는 유의한 변수로 나타났다. 토양보정식생지수와 정규화시가지지수는 행정동단위 까지 그 값의 차이가 존재하는 것으로 나타났으며, 열섬현상 완화를 위한 바람길 환경 조성은 행정동 차원에서의 시행이 필요한 사항이다. 따라서 토지피복 개선 계획, 바람길 조성 계획, 개발지역에 대한 벽면 녹화계획 등 열섬현상 완화를 위한 사업들은 행정구 단위의 차이만을 고려하기보단 구안에 속한 행정동까지 고려할 필요가 있을 것으로 판단된다. 본 연구의 결과는 도시 도시열섬현상 완화를 위해 행정동 단위에서의 분석의 필요성과 고려해야할 변수를 도출하여 향후 도시 열환경 설계 및 정책 개발 시 접근방향을 제공할 것으로 기대한다. The increase in the rate of industrialization due to urbanization has caused the Urban Heat Island phenomenon where the temperature of the city is higher than the surrounding area, and its intensity is increasing with climate change. Among the cities where heat island phenomenon occurs, Seoul city has different degree of urbanization, green area ratio, energy consumption, and population density in each administrative district, and as a result, the strength of heat island is also different. So It is necessary to analyze the difference of Urban Heat Island Intensity by administrative district and the cause. In this study, the UHI intensity of the administrative gu and the administrative dong were extracted from the Seoul metropolitan area and the differences among the administrative districts were examined. and linear regression analysis were conducted with The variables included in the three categories(weather condition, anthropogenic heat generation, and land use characteristics) to investigate the cause of the difference in heat UHI intensity in each administrative district. As a result of analysis, UHI Intensity was found to be different according to the characteristics of administrative gu, administrative dong, and surrounding environment. The difference in administrative dong was larger than gu unit, and the UHI Intensity of gu and the UHI Intensity distribution of dongs belonging to the gu were also different. Linear regression analysis showed that there was a difference in heat island development intensity according to the average wind speed, development degree, Soil Adjusted Vegetation Index (SAVI), Normalized Difference Built-up Index (NDBI) value. Among them, the SAVI and NDBI showed a difference in value up to the dong unit and The creation of a wind route environment for the mitigation of the heat island phenomenon is necessary for the administrative dong unit level. Therefore, it is considered that projects for mitigating heat island phenomenon such as land cover improvement plan, wind route improvement plan, and green wall surface plan for development area need to consider administrative dongs belonging to the gu rather than just considering the difference of administrative gu units. The results of this study are expected to provide the directions for urban thermal environment design and policy development in the future by deriving the necessity of analysis unit and the factors to be considered for the administrative city unit to mitigate the urban heat island phenomenon.

공간분석을 이용한 국립공원 신규 후보지역 선정 평가

김근한(Kim, Geun Han),정휘철(Jung, Hui Cheul),윤정호(Yoon, Jeong Ho),김오석(Kim, Oh Seok),전성우(Jeon, Seong Woo) 대한공간정보학회 2017 대한공간정보학회지 Vol.25 No.3

우수한 자연환경을 체계적이고 지속적으로 보호하고 관리하기 위해 적정한 국립공원 지정 관리 목표 설정과 국립공원 확대 지정을 위한 객관적인 평가방안은 필수적이다. 이를 위해 육상형 국립공원 신규지정 후보지역들의 도출을 위해 공간분석 기반의 국립공원 후보지역 도출 방안을 개발하는데 목적이 있다. 육상형 국립공원 신규지정 후보지역들의 도출을 위한 평가 시 자원성과 타당성으로 구분하여 평가를 수행하였으며, 자원성 평가 결과 우수지역으로 도출된 지역 중 타당성 평가 결과 높은 점수를 나타낸 지역들을 최종 신규 국립공원 후보지역으로 도출하였다. 자원성 평가에서는 자연생태계, 자연경관, 문화경관 항목을 검토하였으며, 타당성평가에서는 자연생태계, 자연경관, 문화경관, 지형보존, 위치 및 이용편의, 과학교육적 가치, 휴양적 가치를 검토하여 평가하였다. 분석결과 지자체에서 국립공원으로 승격을 요구했던 금정산, 백운산, 가지산, 팔공산 등을 포함하여 다양한 지역들이 신규 후보지역으로 선정되었으며, 기존 국립공원을 확대한 지역들 또한 국립공원 확대지역으로 가능한 지역인 것으로 나타났다. 본 연구의 결과는 향후 우리나라 국립공원 신규 지정 후보지역의 선정 및 국립공원의 지속적인 관리를 위해 활용할 수 있을 것이다. The purpose of this research is to derive a list of candidates that are likely to become a new member of South Korean national parks. In order to do so, it is necessary to design an objective assessment mechanism that is based on geographic information systems/sciences(GIS) enabling spatial analyses, so that it can manage and conserve the national parks in a systematic and consistent fashion. When assessing the candidates “resource evaluation” and “feasibility evaluation” are considered, and only the terrestrial parks are investigated. These two factors are calculated individually and spatially-explicitly, and later, the maps are overlaid to identify the new candidates for the national park system. In the case of resource evaluation, natural ecosystem, and natural and cultural landscapes are reviewed; in the case of feasibility evaluation, natural ecosystem, natural and cultural landscapes, terrain conservation, location and utility, scientific and educational values, and recreation aspect are reviewed. It turns out that Mt.Geumjeong, Mt.Gaegun, Mt.Gaji, Mt.Palgong, etc. are the new competitive candidates, accompanied with the existing national parks with more expansive geographical boundaries. The research outcome is expected to enhance the sustainability and management of the national parks in South Korea.

생태계 서비스 가치평가를 위한 멸종위기 포유류의 종분포 연구 -전국자연환경조사 자료를 중심으로-

전성우 ( Seong Woo Jeon ),김재욱 ( Jae Uk Kim ),정휘철 ( Hui Cheul Jung ),이우균 ( Woo Kyun Kee ),김준순 ( Joon Soon Kim ) 한국환경복원기술학회(구 한국환경복원녹화기술학회) 2014 한국환경복원기술학회지 Vol.17 No.1

The provided habitat of many services from natural capital is important. But because most ecosystem services tools qualitatively evaluated biodiversity or habitat quality, this study quantitatively analyzed those aspects using the species distribution model (MaxEnt). This study used location point data of the goat(Naemorhedus caudatus), marten(Martes flavigula), leopard cat(Prionailurus bengalensis), flying squirrel(Pteromys volans aluco) and otter(Lutra lutra) from the 3rd National Ecosystem Survey. Input data utilized DEM, landcover classification maps, Forest-types map and digital topographic maps. This study generated the MaxEnt model, randomly setting 70% of the presences as training data, with the remaining 30% used as test data, and ran five cross-validated replicates for each model. The threshold indicating maximum training sensitivity plus specificity was considered as a more robust approach, so this study used it to conduct the distribution into presence(1)-absence(0) predictions and to talled up a value of 5 times for uncertainty reduction. The test data`s ROC curve of endangered mammals was as follows: growing down goat(0.896), otter(0.857), flying squirrel(0.738), marten(0.725), and leopard cat(0.629). This study was divided into two groups based on habitat: the first group consisted of the goat, marten, leopard cat and flying squirrel in the forest; and the second group consisted of the otter in the river. More than 60 percent of endangered mammals` distribution probability were 56.9% in the forest and 12.7% in the river. A future study is needed to conduct other species` distribution modeling exclusive of mammals and to develop a collection method of field survey data.

공간 빅데이터의 개념 및 요구사항을 반영한 서비스 제공 방안

김근한(Kim, Geun Han),전철민(Jun, Chul Min),정휘철(Jung, Hui Cheul),윤정호(Yoon, Jeong Ho) 대한공간정보학회 2016 대한공간정보학회지 Vol.24 No.4

본 연구에서는 빅데이터와 공간 빅데이터 선행연구들을 기반으로 공간 빅데이터를 빅데이터를 구성하는 하나의 구성요소로 인식하고, 위치정보를 이용하여 공간화 할 수 있으며, 시계열 변화에 따라 계속적으로 누적되는 모든 데이터들과 이를 이용할 수 있는 활용체계를 공간 빅데이터라 정의하였다. 따라서 공간 빅데이터는 기존 빅데이터와 분리하여 구분할 것이 아니라, 기존 빅데이터를 구성하는 하나의 구성요소로서 이해하고, 이러한 활용체계 안에서 공간 빅데이터의 활용방안을 검토해야 한다. 본 연구에서는 공간 빅데이터가 제공해야 하는 서비스 요구사항들을 제시하였다. 공간정보를 포함한 공간 빅데이터는 기본적으로 다양한 공간분석이 가능해야 하고, 기존에 구축된 공간정보와 향후 구축될 공간정보까지 고려할 수 있는 서비스 고려가 필요하다. 시간의 흐름에 따른 위치별 시계열 변화의 탐지는 물론 공간정보의 속성정보들을 이용하여 다양한 빅데이터 관련 분석이 가능해야 한다. 공간정보가 아닌 빅데이터 또한 공간정보와 연계하여 공간 분석이 가능해야 한다. 이러한 공간 빅데이터 요구사항들을 만족시키기 위해 다양한 형태의 빅데이터들과 공간 빅데이터의 연계가 가능한 분석 서비스 제공을 위한 샘플링 포인트 생성 및 속성정보 추출 방안을 제시하였다. 이러한 빅데이터와 연계된 공간정보의 활용 증대는 공간정보 산업 및 기술발전에 크게 기여할 수 있을 것이라 판단된다. By reviewing preceding studies of big data and spatial big data, spatial big data was defined as one part of big data, which spatialize location information and systematize time series data. Spatial big data, as one part of big data, should not be separated with big data and application methods within the system is to be examined. Therefore in this study, services that spatial big data is required to provide were suggested. Spatial big data must be available of various spatial analysis and is in need of services that considers present and future spatial information. Not only should spatial big data be able to detect time series changes in location, but also analyze various type of big data using attribute information of spatial data. To successfully provide the requirements of spatial big data and link various type of big data with spatial big data, methods of forming sample points and extracting attribute information were proposed in this study. The increasing application of spatial information related to big data is expected to attribute to the development of spatial data industry and technological advancement.

생태계 서비스 가치평가를 위한 산림 유형 분류 방안 - 임상도와 토지피복지도 활용을 중심으로 -

전성우 ( Seong Woo Jeon ),김재욱 ( Jae Uk Kim ),정휘철 ( Hui Cheul Jung ) 한국환경복원기술학회(구 한국환경복원녹화기술학회) 2013 한국환경복원기술학회지 Vol.16 No.3

Some researcher started studies of natural capital from 1980`s. But many researches are going along with the theme lately. Most assessment of ecosystem services are approaching a general assessment using a land-cover map. Therefore they have some problems such as overestimate, underestimate, and double counting, and so on. This study suggested a detailed typology for quantitative assessment about ecosystem services. It compared land-cover map and forest type map to select a based map and made criteria with reference to the literature and field survey. It subdivided a forest typology using ecological feature (natural forest, artifical forest), forest type (coniferous forest, mixed forest, hardwood forest) and age of stand in forest type map. Each forest type is widely distributed 21~40 ages of forests and biggest area is 21~40 ages of mixed forest in all forest typology. Further researches have to progress consistently assessment using detailed typology and function of forest ecosystem services.

연구논문 : 기후변화의 영향평가를 위한 대순환모형과 지역기후모형의 비교 연구

이동근 ( Dong Kun Lee ),김재욱 ( Jae Uk Kim ),정휘철 ( Hui Cheul Jung ) 한국환경영향평가학회 2006 환경영향평가 Vol.15 No.4

기후변화 시나리오 및 토지이용변화에 따른 유출수 변화량 산정

이동근(Lee Dong-Kun),성선용(Sung Sun-Yong),정휘철(Jung Hui-Cheul) 대한국토·도시계획학회 2010 國土計劃 Vol.45 No.5