综合RS与GIS方法的海南生态环境研究

以1987年海南植被类型图，1988年海南省土壤侵蚀图和1987年与1998年的TM遥感资料为信息源，综合应用ERDAS和ARC／INFO软件分析了海南建省前后生态环境的变化情况，并对生态环境现状进行了评价．结果表明，作为本区自然生态环境质量标志的季雨林、雨林面积变化不大，自然生态环境质量由中部山区向外依次降低．人类活动对自然生态环境的影响明显，人工植被大幅度增加，但天然植被面积呈现减少趋势．

Pre hminary Study on the Natural EcologicalEnvironment in Hainan Island Integrated RS and GIS

RS is at present the primary and effective means of measurement to ecological situation. GIS provides and efficient tool to analyze the status and the changes of ecological environment. In the study, we use 1987 vegetation distributing map, 1988 soil erosion map, 1987 and 1998 TM Landsat data to construct ecological map, to study the vegetation and soil erosion changes and to evaluate the landscape ecological forms in Hainan province according to landscape ecology with the integration of visual interpretation and supervised classification with GIS. The result shows that the quality of the ecological environment is gradually declining from the central of the Hainan island to its border. The area of rain forest and season rainforest change comparatively less. Human disturbance factors take deep effects on the forest ecosystem. There was an evident change to the man-masde vegetation in the study as s whole which increased. But the area of the natural vegetation decreased.