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地表上绿色植物的分布面积和变化特征可通过植被覆盖指数加以反映,结合RS、GIS的理论知识与技术,运用ENVI遥感影像和ARCGIS软件作为辅助工具,计算出郑汴两市的植被覆盖指数,分析了2003~2014年郑州、开封两市在“郑汴一体化”进程中城市植被格局时空演变的规律。结果表明:(1)整个郑州市以及郑州四环内市区的绿地面积呈逐渐下降的趋势;(2)开封市虽然在整个区域的植被覆盖面积有所下降,总体上变化甚微,但是开封市区的植被覆盖率大幅下降。
The distribution area and variation characteristics of the green plants on the ground can be reflected by the vegetation coverage index. Combined with the theoretical knowledge and technology of RS and GIS, using the ENVI remote sensing images and ARCGIS software as a supporting tool, The spatial and temporal evolution of urban vegetation patterns in Zhengzhou and Kaifeng cities during the period of “Zheng 汴 integration” from 2003 to 2014 was analyzed. The results showed that: (1) The area of green land in the inner city of Zhengzhou and the inner ring of the fourth ring in Zhengzhou showed a gradual downward trend; (2) Although the area of vegetation cover in Kaifeng City decreased slightly in the whole area, Urban vegetation coverage dropped significantly.