三亚市土地利用景观格局稳定性及动态变化

Stability and Dynamic Changes of Land Use Landscape Pattern in Sanya

基于MapGIS10平台,利用三亚市2004、2008、2013和2017年的卫星遥感影像,从景观结构、景观类型和景观异质性等方面分析研究区的景观格局特征;采取主成分分析方法,建立三亚市景观格局整体评价模型,对三亚市景观格局稳定性及动态变化进行定量分析.结果表明:在14年间研究区的土地利用类型变化较大,各地类间相互转换频繁,其中林地、园地、建设用地、耕地之间的转化决定着研究区土地利用类型的变化特征;2004、2008、2013和2017年三亚市土地利用空间结构稳定性指数分别为8.65、4.93、4.38和4.13,整体上景观格局稳定性呈现先下降后平稳的趋势;林地、耕地和园地为研究区的主要景观类型,对调控景观稳定性起到决定性作用.城市化的进程加快,使得三亚市土地破碎化程度有所上升.

Based on the MapGIS10 platform,the satellite remote sensing images of Sanya in 2004,2008,2013 and 2017 were used to analyze the landscape pattern characteristics of the research area from the aspects of landscape structure,landscape type and landscape heterogeneity.The principal component analysis method was adopted to establish an overall evaluation model of Sanya landscape pattern,and a quantitative analysis was carried out on the landscape stability and dynamic changes of Sanya.The results show that:The landscape pattern of the research area has undergone a series of changes in the past 14 years,and the land use types are frequently converted.The transformation between forest land,garden land,construction land and cultivated land determines the change characteristics of land use types in the research area.The overall spatial structure stability index of urban land use in Sanya in 2004,2008,2013 and 2017 is 8.65,4.93,4.38 and 4.13,the overall stability of the landscape pattern showed a trend of gradually stable state after the earlier decline;Among them,forest land,cultivated land and garden land are the main landscape types,which play a decisive role in regulating the stability of land use landscape;the acceleration of urbanization has led to an increase in the fragmentation of land in Sanya.