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根据2000年和2010年长株潭城市群核心区TM遥感影像解译数据,进行景观分类和景观格局指数选取,采用移动窗口、梯度分析方法,揭示十年间研究区景观格局时空演变特征。结果表明:农田景观为基质景观,其它景观为镶嵌体景观,景观类型转移呈现出林地和灌丛向农田和城镇转化,农田向城镇转化的过程;从景观指数的空间分布来看,最大斑块指数高低值呈南北分散分布,景观形状指数和斑块密度低值在城市中心,高值主要在城市边缘,香农多样性指数高值沿湘江呈带状分布,上述指数十年间变化主要发生在城市周围;通过景观格局指数梯度分析得知,各景观格局指数具有明显的梯度效应,十年来城市中心及边缘变化较大,城乡结合部基本保持稳定。
According to the TM image interpretation data of the core area of Chang-Zhu-Tan urban agglomeration in 2000 and 2010, landscape classification and landscape pattern index selection were carried out. The moving window and gradient analysis method were used to reveal the temporal and spatial evolution characteristics of the landscape pattern in the ten years. The results showed that: the farmland landscape was the matrix landscape, the other landscapes were the mosaic landscapes, the landscape type transformation showed the process that the forestland and the shrubs transformed into the farmland and the town, and the farmland was transformed into the urban areas. From the spatial distribution of the landscape index, the largest patch High and low values of the index were scattered from north to south, landscape shape index and low plaque density were in the city center, high values were mainly on the edge of the city. The high Shannon diversity index was distributed along the Xiangjiang River. Through the analysis of the gradient of landscape pattern index, the gradient index of each landscape pattern shows obvious gradient effect. In the past ten years, the center and edge of the city have changed greatly, and the junction of urban and rural areas has remained basically stable.