塔里木盆地南缘绿洲荒漠化动态变化遥感研究——以策勒县为例

根据遥感调查结果，论述塔里木南部地区策勒县荒漠化动态变化的特征及分布规律。在揭示规律之前，利用地面控制点对1977年，1990年，1998年三个不同时期的多源卫星遥感数据（MSS，HRV，TM）进行精确配准，并对多源卫星遥感图像数据复合进行了研究。在野外调研的基础上应用PCI软件进行图像数据处理，编制了策勒地区不同年代的土地分类及土地类型动态变化图；通过不同时期遥感图像中荒漠化环境要素的对比分析，研究了策勒县周围地区近21年的荒漠化动态变化规律，从自然和人文因素两个方面分析探讨了荒漠化发展的趋势。

Study of Oasis Desertification Dynamic Change in the South of Tarim Basin

According to investigation results based on remote sensing technology, This paper discusses the patterns of Cele oasis desertification dynamic change in the south of Tarim Basin. Considering macroscopical research, this paper chooses 4 main land cover types which are desertification, oasis, Ecotone and water body, and they represent distinct characteristics of the local area. To register 3 different time, spatial resolution and spectral resolution satellite images, the paper uses some GCPs registered accurately 3 satellite images (for MSS, TM, SPOT HRV) and fuses a image with these multi_source data. The fusion image shows more details than mono_time image and plays a assistant revising role to some dynamic change charts as followings. On the basis of field survey and some statistical data, the paper uses PCI soft ware to process these data and produces a series of 4 main land cover dynamic change charts. Through analyzing these charts, the paper has studied the dynamicly distributed data of land covers spanning 21 years and the regulation of the local ecological environmental system. At last the paper points out that the trend of Cele region oasis desertification expansion is derived from two important reasons which have severe influences of nature and humanity. Therefore, in order to ameliorate the local ecological environment, people living in Cele country should work hard to plant more to preserve their homeland and reduce the degree of sandy wind offensive, to develop social economy, and to carry out sustaining development.