基于RS与GIS的土地沙漠化与土地利用变化时空耦合

土地利用是土地沙漠化发生、发展的重要驱动因子之一.研究土地利用变化及其与土地沙漠化之间的时空关系,是查明土地沙漠化成因机理及发展驱动的重要前提和基础.本文以毛乌素沙地为例,基于TM遥感影像,应用RS与GIS技术,在对20世纪80年代末到90年代末毛乌素沙地土地沙漠化演变与土地利用变化过程反演的基础上,从时空耦合的角度,对毛乌素沙地土地沙漠化演变与土地利用变化之间的关系进行了耦合关联分析,并建立了土地沙漠化转化等级与土地利用变化类型之间的关联关系.研究结果显示毛乌素土地沙漠化与土地利用变化之间具有较强的关联关系,而且这种关联性具有较为明显的区域差异性.

Coupling Analysis Between Desertification and Land-use Change Based on RS and GIS

Land-use is one of the important factors leading to desertification.Therefore,for discovering origin mechanism and development of desertification,it is the important precondition and base to research land-use change and its correlation in time and space with desertification.In this paper,taking Maowusu Sand Land as an example,applying RS and GIS,using TM and MSS data in space and time aspect,coupling analysis between land-use change and desertification is made on the basis of presentation land-use change and desertification evolution from the end of the 1980's to the end of the 1990's,and correlation between the degree of desertification and the area of land-use change is established also.Results show that there is a strong relationship between the degree of desertification and the area of land-use change,and obvious regional difference exists in this relationship.