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RISS 인기검색어
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GIS 를 이용한 하천의 자연성 평가 - 청주시 무심천 지역을 중심으로 -
박병철(Byeong Cheol Park),신영철(Young Cheol Shin),서애숙(Ae Suk Suh) 한국지리정보학회 2002 한국지리정보학회지 Vol.5 No.1
River plays an important role both to nature and people. Also considering the limitation of land and water resources coupled with the continuous urbanization and industrialization of Korea, the effective river management becomes more and more important. The evaluation units consisted of main 3 factors (13 detail factors) are classified 5 grade and 5 scores system. The survey area was divided and selected by 5 zones in Musim-cheon river. The final result of evaluation for 5 Zone is good near natural river following next order; 1 (4.07), 2 (3.56), 5 (3.4), 4 (3.1) and 3 Zone (2.6 score) On this condition, the main purpose of this study was to apply GIS (geographic information system) spatial analysis for evaluation method of river naturalness in order to promote the river management and the process of ecological restoration of river corridors.
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GMS - 5 인공위성 원격탐사 자료를 이용한 대기 에어러솔 모니터링
이권호(Kwon Ho Lee),김정은(Jeong Eun Kim),김영준(Young Jun Kim),서애숙(Ae Suk Suh),안명환(Myung Hwan Ahn) 한국지리정보학회 2002 한국지리정보학회지 Vol.5 No.2
Atmospheric aerosols interact with sunlight and affect the global radiation balance that can cause climate change through direct and indirect radiative forcing. Becasue of the spatial and temporal uncertainty of aerosols in atmosphere, aerosol characteristics are not considered through GCMs (General Circulation Model). Therefor it is important physical and optical characteristics should be evaluated to assess climate change and radiative effect by atmospheric aerosols. In this study GMS-5 satellite data and surface measurement data were analyzed using a radiative transfer model for the Yellow Sand event of April 7∼8, 2000 in order to investigate the atmospheric radiative effects of Yellow Sand aerosols, MODTRAN3 simulation results enable to inform the relation between satellite channel albedo and aerosol optical thickness(AOT). From this relation AOT was retreived from GMS-5 visible channel. The variance observations of satellite images enable remote sensing of the Yellow Sand particles. Back trajectory analysis was performed to track the air mass from the Gobi desert passing through Korean peninsular with high AOT value measured by ground based measurement. The comparison GMS-5 AOT to ground measured RSR aerosol optical depth(AOD) show that for Yellow Sand aerosols, the albedo measured over ocean surfaces can be used to obtain the aerosol optical thickness using appropriate aerosol model within an error of about 10%. In addition, LIDAR network measurements and backward trajectory model showed characteristics and appearance of Yellow Sand during Yellow Sand events. These data will be good supporting for monitoring of Yellow Sand aerosols.
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