绿洲演变动态监测的遥感分析

绿洲演变是绿洲研究的核心问题。针对干旱区绿洲的特点,阐述了绿洲变化及其研究的特点和内容,在此基础上,以玛纳斯绿洲为例,分析了绿洲属性变化和空间位置变迁的遥感应用。研究表明,遥感技术进行短时间尺度内的绿洲属性变化研究,可以比较准确地掌握在特定时间内绿洲组分、结构及功能的变化情况。同时通过遥感影像反映出的水系变迁信息,结合地貌学的相关理论和绿洲的逐水竞生性,研究河道、扇缘、阶地等地貌类型与绿洲变化的关系,进而从更长时间尺度上分析绿洲空间位置变迁过程的方法。

Application of RS Technology in the Research of Oasis Dynamic Change

Oasis,an important area in arid zone,is active,dynamic and related with spatial position.Among allthe issues,oasis evolvement is the core.Basing on the study of the characteristics and rule of oasis changes,the following properties are obtained:(1)Oasis changes include attribute change(compostion,fabric,function,etc.)and the space change(shape,borderline,position,etc.).(2)Oasis change is an active and dynamic pro-cess,which does not take place in the past,but also at present and in the future.(3)Oasis change relates toenvironmental science,geology,spatial information science,ecology,etc.,so oasis change research is a muhi-disciplinary integrated research.The content of oasis change research includes the attribute research,positionchange research,evolvement processes research,driving force research and mechanism research.RS(Remote Sensing)which is a high-technology has been developed quickly and been used widely dur-ing these years in the field of resource investigation,environment monitoring,etc.In this paper,after a briefintroduction of the oasis change,the oasis change research takes Manas oasis as an example for analyzing theapplication of RS technology in the research of oasis attribute change and its spatial position transference.Themethod using RS technology and the theory of physiognomy and geology to study oasis space-time change pro-cess that took place in the past is discussed.