黄河三角洲建设用地与植被覆盖度时空变化及其相关性分析

Spatio-temporal Variation and Correlation Analysis between Construction Land and Vegetation Coverage in the Yellow River Delta

为了研究黄河三角洲植被与建设用地的关系,利用1985—2010年的专题制图仪(Thematic Mapper,TM)影像,通过归一化植被指数(Normalized Difference Vegetation Index,NDVI)、增强的指数型建筑用地指数(Enhanced Index Building Land Index,EIBI)、影像对比与Spearman相关分析的方法,对该地区建设用地和植被覆盖度的时空变化进行研究,探讨该地区建设用地对植被覆盖度的影响。结果显示,该地域建设用地与植被覆盖变化明显,城镇建设用地由126.927 km2增加到286.9425 km2;植被覆盖度由42.7%增长到50.8%,两者没有明显相关性。但是建设用地与高植被覆盖区(>50%)、中植被覆盖区(40%~50%)存在明显相关性,建设用地的发展对其造成影响。

In order to study the relationship between vegetation and construction land in the Yellow River Delta.In this paper,using TM images from 1985 to 2010,the spatiotemporal changes of construction land and vegetation coverage was studied and the impact of regional construction land on vegetation coverage was discussed,through the Normalized Vegetation Index(NDVI),enhanced Enhanced Index Building Land Index(EIBI),image comparison and Spearman correlation analysis method.The results showed that:on one hand,the construction land and vegetation coverage in this area changed significantly:the urban construction land increased from 126.927 square kilometers to 286.9425 square kilometers,and the vegetation coverage increased from 42.7%to 50.8%;on the other hand,there was no obvious correlation between the two.However,there was a strong correlation between construction land and high vegetation coverage areas(>50%)and medium vegetation coverage areas(40%~50%),which was caused by the influence of the development of construction land.