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A Study on the Evaluation Method of Urban Open Spaces of Seoul with Remote Sensing: Detection of the Ecotone of the Mt. Pukhansan National Park

위성영상자료를 이용한 서울시 도시녹지의 평가기법 연구: 북한산 국립공원 주연부 탐지


Abstract

The purpose 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 boundary 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 nealy doubled during 1985-1993 period. Third, NDVI vaules 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.

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 도출하 고, 버퍼링작업에 의하여 경계선으로 부터의 거리별 NDVI를 산출하여 추이대를 조사하는 방법을 제시하였다. 연구 결과 본 연구대상지의 추이대의 식생은 생물계절(phenology), 인접지역의 토지 이용의 영향을 받는 것이 확인되었으며, 1993년에는 1985년에 비해서 추이대의 폭이 약 2배로 증 대되어 탐방객의 과도한 이용 등으로 인하여 공원경계부 인접한 식생 피해지역의 범위가 확대되 고 있는 것으로 판명되었다.

Keywords

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