20年来环青海湖区沙漠化土地的空间变化及其驱动力分析

Spatial variation and driving force of sandy desertification in the peripheral area of the lake Qinghai in recent 20 years

基于RS和GIS技术,选择青海省环青海湖地区为研究对象,以1987年和2006年这两个时期的TM影像数据为主要信息源,并辅助以1995年环湖区的土地利用现状图及其它资料,以基于人机交互解译的分类方法,对环湖区土地利用进行监测,提取环湖区近20年来的沙漠化土地的变化信息,采用转移矩阵法分析研究其空间变化,并对导致其变化的驱动力进行了分析和讨论,力求对该区未来的规划发展提供科学依据。

Supported by remote sensing and geographic information system,taking the peripheral area of the Qinghai Lake in Qinghai Province as the research object,based on TM images in 1987and 2006 as the main information source,aided by the land use status chart and other materials in the peripheral area of the Qinghai Lake,based on the classification of man-machine interactive interpretation,the land use was monitor,the change information of sandy desertification in the peripheral area of the Qinghai Lake in recent 20 years was extracted,Using the method of transfer matrix we analyzed and researched these changes,and discussed the driving force of it in order to provide the scientific basis for the area＇s planning and development in the future.