【摘要】 利用遥感影像数据分析区域土地覆被变化,目前在开发建设项目环境影响调查中已得到广泛应用。选取水电站工程(天生桥一级水电站工程)和天然气开发工程(孝新合气田开发工程)两类建设项目作为分析对象,利用TM遥感影像进行项目区域土地覆被变化分析。通过FRAGSTATS方法,对6个有代表性的景观空间结构与异质性的定量指标进行计算,研究建设项目周边区域景观结构与景观格局变化。研究结果表明,两类项目周边区域土地覆盖类型均发生较大变化,景观格局呈破碎化,多样化发展。水电站项目建设通过水库蓄水和工程占地直接影响库周土地覆被变化,天然气开发项目通过带动经济发展,对区域土地覆被变化主要是间接影响。更多还原

【Abstract】 Land cover changes analysis by RS data has been widely used to study the environmental impact of the development project at present.Two kinds of construction project-hydropower reservoir project(Tianshengqiao No.1 hydropower reservoir) and natural gas field exploitation project(Xiaoxinhe natural gas field) were discussed,and the land cover changes in the project areas were analyzed through interpretation of the Landsat-TM data.FRAGSTATS was applied in landscape structure analysis,and six representative quantitative indices of the landscape spatial structure and heterogeneity were analyzed.The results showed that land cover in the areas of the two projects both had great changes,and landscape spatial pattern had tended to become fragmented and diversified.Furthermore,there were different characteristics in the land cover changes comparing two projects.Hydropower reservoir had direct influence on land cover changes for great impoundment and occupation of land.However,natural gas field exploitation accelerated the development of other economic activities in surrounding region,which brought about land cover changes indirectly.更多还原