위성영상자료를 이용한 서울시 도시녹지의 평가기법 연구: 북한산 국립공원 주연부 탐지

박종화 ( Chong Hwa Park ) 大韓遠隔探査學會 1995 大韓遠隔探査學會誌 Vol.11 No.3

본 연구의 목적은 북한산 국립공원 경계선 일대의 추이대를 탐지하는 기법을 개발하여 추이대의 폭을 조사하고, 시간경과에 따른 추이대의 폭의 변화여부를 조사하여 과도한 이용자의 집중과 주변부의 환경오염에 의한 추이대 식생의 피해 여부를 규명하는 것이다. 이를 위해서 1985, 1987, 1993년 5월 중순에 수신된 TM영상을 이용하여 계산한 정규식생지수(NDVI)를 도출하고, 버퍼링작업에 의하여 경계선으로부터의 거리별 NDVI를 산출하여 추이대를 조사하는 방법을 제시하였다. 연구 결과 본 연구대상지의 추이대의 식생은 생물계절(phenology), 인접지역의 토지이용의 영향을 받는 것이 확인되었으며, 1993년에는 1985년에 비해서 추이대의 폭이 약 2배로 증대되어 탐방객의 과도한 이용 등으로 인하여 공원경계부 인접한 식생 피해지역의 범위가 확대되고 있는 것으로 판명되었다. The purposes of this research were to find ways to detect ecotone between the Mt. Pukhansan National Park and adjacent urban residential areas, to measure the width and size of ecotone around the park, and to investigate temporal change of ecotone around the park. Normalized Difference Vegetation Index(NDVI) derived from TM data (May of 1985, 1987, and 1993) and the analytical capabilities of GIS were used to investigate the impacts of human activities inside of and outside of the bounadry of the park. Major findings of the study can be summarized as follows: First, ecotone around the boundary of the national park could be identified from NDVI-distance curves derived by a series of buffering operations with a GIS. Second, average width of ecotone around the park was nearly doubled during 1985-1993 period. Third, NDVI values of the park were about 14 percent higher than those of surrounding areas. Finally, it seems that the expansion of the ecotone of the park is related to heavy trampling of visitors and various types of environmental pollution of the adjacent urban areas.

Eurasian Otter (Lutra lutra) Habitat Suitability Modeling Using GIS; A case study on Soraksan National Park

Park, Chong-Hwa,Joo, Wooyeong,Seo, Chang-Wan Korea Spatial Information Society 2002 한국공간정보학회지 Vol.10 No.4

Eurasian otter (Lutra lutra) is one of endangered wildlife species whose population size is declining in Korea. To manage and conserve habitat for Eurasian otter, it is crucial to understand which habitat components affect otter habitat qualities. The objectives of this study were to develop a habitat suitability model of Eurasian otter in Soraksan National Park, to validate the model in Odaesan National Park. The research methods of this study were as follows. First, trace data and characters of Eurasian otter habitat were collected with Geographic Information System (GIS) data and Global Positioning System (GPS) receivers between 2000 and 2002. Second, the habitat use factors were identified as habitat characteristics of Eurasian otter and classified with habitat use and availability analyses. Third, significant factors of habitat model were extracted by Chi-square test. The last, Eurasian Otter Habitat Suitability Model (EOHSM) was employed by logistic regression method. Otter habitat use was positively associated with the reeds and shrubs areas adjacent to streams, the size of boulders, and low human disturbance in Soraksan National Park by EOHSM. This model had a classification accuracy of 74.4% at cutoff value of 0.5. Model validation showed a classification accuracy of 86.6 % at cut off value of 0.5 for otter habitat in Odaesan National Park.

지리산 반달가슴곰 상사리 입지와 조망 특성

유재심 ( Jae Shim Yu ),박종화 ( Chong Hwa Park ),우동걸 ( Dong Gul Woo ) 한국환경복원기술학회 2012 한국환경복원기술학회지 Vol.15 No.4

The objective of this study is to investigate the characteristics of the location and prospects of the bear shelves built by Asiatic black bears in the Jirisan National Park. Previous researchers have been analyzed bear shelves in terms of places for resting and eating, but we are going to analyze based on the prospect-and-refuge theory. Characteristics of the sites of bear shelves are measured through field survey and topographic analysis by using digital elevation model (DEM). The normalized difference vegetation index (NDVI) is used to evaluate the optimum location of bear shelves in terms of crown density. Man-made objects are identified by viewshed analysis based on geographical information system (GIS). Findings of this paper can be summarized as follows. First, most bear trees are located deep inside of the mountainous national park, slopes of 30~40 degrees, altitude of 400~1,200m, and relatively low vegetation density with NDVI value of 0.4~0.6 compared to the average NDVI of the park. Second, the average height of bear shelves is 12.44m, or 74% of the average height of bear trees.They are located at suitable places to observe nearby trails and other park facilities. Third, man-made objects within the 100m radius of bear trees include lodge, bear training center, beekeeping camp, and hiking trails. Thus we may temporarily conclude that one of the main criteria of the bear tree selection in the park has been to identify optimum places for the monitoring of human activities in their habitat.

설악산국립공원내 산양(Nemorhaedus Caudatus Raddeanus)의 잠재 서식지 적합성 모형; 다기준평가기법(MCE)과 퍼지집합(Fuzzy Set)의 도입을 통하여

최태영,박종화,Choi Tae-Young,Park Chong-Hwa 한국조경학회 2004 韓國造景學會誌 Vol.32 No.4

Korean goral (Nemorhaedus caudatus raddeanus) is one of the endangered species in Korea, and the rugged terrain of the Soraksan National Park (373㎢) is a critical habitat for the species. But the goral population is threatened by habitat fragmentation caused by roads and hiking trails. The objective of this study was to develop a potential habitat suitability model for Korean goral in the park, and the model was based on the concepts of fuzzy set theory and multi-criteria evaluation. The process of the suitability modeling could be divided into three steps. First, data for the modeling was collected by using field work and a literature survey. Collected data included 204 points of GPS data obtained through a goral trace survey and through the number of daily visitors to each hiking trail during the peak season of the park. Second, fuzzy set theory was employed for building a GIS data base related to environmental factors affecting the suitability of the goral habitat. Finally, a multiple-criteria evaluation was performed as the final step towards a goral habitat suitability model. The results of the study were as follows. First, characteristics of suitable habitats were the proximity to rock cliffs, scattered pine (Pinus densiflora) patches, ridges, the elevation of 700∼800m, and the aspect of south and southeast. Second, the habitat suitability model had a high classification accuracy of 93.9% for the analysis site, and 95.7% for the validation site at a cut off value of 0.5. Finally, 11.7% of habitatwith more than 0.5 of habitat suitability index was affected by roads and hiking trails in the park.

보호지역 경계조정을 위한 공간의사결정지원모델 연구 -지리산 국립공원을 사례로-

성혜정 ( Hye Jung Sung ),권혁수 ( Hyuk Soo Kwon ),서창완 ( Chang Wan Seo ),박종화 ( Chong Hwa Park ) 한국환경복원기술학회 2011 한국환경복원기술학회지 Vol.14 No.3

The purpose of this study are to develop a SDSS (Spatial Decision Support System) that can incorporate diverse opinions of stakeholders related the designation of protected areas (PA), and to employ the model for the readjustment of the boundary line of the Jirisan National Park of Korea. The SDSS would lead to more rational and less controversial decision-making during the expansion or removal of PA in Korea. Research methods are as follows. Firstly, to select evaluation criteria for SDSS for PA designation by using expert interview and literature survey. Secondly, to measure their preferences on the designation of additional PA or the removal of a part of PA based on the opinions of various stakeholders such as local residents, environmental groups, or public officials. Thirdly, to produce conservation priority maps based on a multi-criteria decision making technique. The SDSS would be used to rational decision making for the expansion of PA or the release of a certain part of PA by reflecting diverse preferences on biodiversity conservation and economic interest of residents. The visualization of conservation priority maps would also increase the efficiency of such decision making processes. The evaluation criteria for the expansion of PA for biodiversity conservation includes vegetation conservation value, wildlife conservation value, and the habitats of key species. The evaluation criteria for the removal of PA includes the proximity to roads and the boundary of PA, land use types, and conservation zoning of the PA. Preference weights are based on data collected from the Jirisan National Park. Both the conservation priority and removal priority maps are based on land parcels so that property rights of all parcels would be correctly represented.

안양천의 수질개선과 자연형하천정비 방안

박종화 서울大學校 環境大學院 1999 環境論叢 Vol.37 No.-

Symmetric Cryptographic Algorithms 을 이용한 OSI-분산 시스템에서의 Biba Security 모델의 구현

박종화 世明大學校 1998 世明論叢 Vol.7 No.-

This paper discusses a distributed implementation of the Biba security policy model. In this paper symmetric cryptographic systems are considered for the realization of these security service. It is investigated how key-distributions can be found resulting in a minimum number of key. Application of a symmetric crypographic system results in key-distributions which require more keys tha a key-distribution going with the use PKSs(Public Key System)

水質汚染 指標種으로서의 淡水藻類에 關한 硏究

朴鐘聲,崔信錫,申昌男,琴鍾和 忠南大學校 環境問題硏究所 1984 環境硏究 Vol.2 No.2

In order to determine the fresh- water algae as indicators of water pollution, an attempt was conducted from February 28 to October 20, 1984 at the six stations of the Geum River. 1. The St. 1 and 2 showed farirly good water quality. The value of BOD at St. 3 was 6.4 ppm exceeding the permitted level of pollution (5 ppm). Those values at St. 4, 5, and 6 were 2.0- 5.0ppm below the permitted level. 2. DO, BOD, COD, C1-,and NH₃-N contents were significantly different from one another of the surveyed stations of the Geum River. 3. The algae collected at all surveyed stations were of 52 genera 119 species. The relative abundance of Nostoc planctonicum and Oscillatoria limosa were very high at St. 3 where the level of pollution was relatively high and at St. 6 where the water quality was affected by the sea-water under the tidal condition. 4. In the Geum River, Gomphonema olivaceum could be regarded as the most important indicator of the water pollution. The permitted levels of BOD, COD, C1-, and NH₃-N contents for its survival are 5.0, 7.9, 39.1, and 4.1 ppm, respectively.

종합과학적 접근법을 이용한 환경보전정책의 수립

박종화 서울大學校 環境大學院 2001 環境論叢 Vol.39 No.-

ATYPICAL MESOBLASTIC NEPHROMA 1례

박만수,이중화,윤율로,설종구 충남대학교 의과대학 지역사회의학연구소 1991 충남의대잡지 Vol.18 No.1

Atypical mesoblastic nephroma is a rare infantile renal tumor that may behave aggressively in older infants. The features that distinguish atypical mesoblastic nephroma from congenital mesoblastic nephrorma are as follows; (1) atypical gross features consisting of one or more of the follwing: flesh areas, foci of hemorrhage, necrosis, involvement of adjacent structures; and (2) high cellularity and mitotic index. Treatment is not established whether additional modes of therapy are indicated in completely resected atypical mesoblastic nephroma. A close and regular periodic follow-up is indicated in all cases of atypical mesoblastic nephroma. A case of atypical mesoblastic nephroma in 45-day-old-male is presented with brief review of literatures.