【摘要】 运用遥感和GIS技术,以及景观生态学的方法,利用1989年LandsatTM影像,1999年、2001年的LandsatETM影像,建立相应的空间图形库系统,研究了近二十年于田地区的景观变化,从景观斑块特征、斑块的空间变化方向和剧烈变化类型角度对该地区景观的时空演变进行了动态描述。并结合多年的实地调查,对产生这些变化的原因进行了定性及定量化研究。更多还原

【Abstract】 Based on remote sensing, GIS and the measures of landscape, using LandsatTM image in 1989a, LandsatETM image in 1999a and 2001a, construct space image-base system in order to analyse the number of lands of Yutian oasis within recent 20 years quantitatively. According the features of the patch of landscape, the orientation of patches’ space change and the typies of drastic change, the space change of land use and land cover is dynamically described. And by many-year investigation to the study area, the reasons resulting to the present situations is analysed quantitatively and qualitatively.更多还原