基于遥感和GIS技术的青海湖北岸植被覆盖动态变化监测

Research on the Dynamic Change of the Vegetation Coverage in the North Shore of Qinghai Lake with RS and GIS Technology

利用两个时相的TM和ETM数据,分别提取了青海湖流域的植被指数,根据植被指数转化模型,通过植被指数计算植被覆盖度。将植被覆盖度划分为4个不同的盖度等级,根据盖度级的空间分布特征,比较分析了试验区植被覆盖变化情况,分析引起植被覆盖变化的因素,为青海湖流域生态环境保护提供参考依据。

The vegetation is one of the most important indicators in measuring of vegetation status, as well as the important parameters in a wide range subject.In this paper,the vegetation index from the Qinghai lake watershed was extracted with two-phase TM and ETM datum and according to vegetation index transformation model,the vegetation coverage level was calculated with vegetation index.The vegetation coverage degree would be divided into four different levels and the change of vegetation coverage under spatial distribution was analyzed.The comparative tive analysis of vegetation cover change showed the reasons of the change in the vegetation cover, which provided the reference for the protection of the ecological environment in Qinghai Lake Basin.