关键词: 信息熵, 土地利用结构, 新济洲, 时空变化

Abstract: Entropy is a measurement of ordering system,which can reflect the order degree of land-use system better.In this paper,the largest marshland Xinjizhou in Yangtze Xinjizhou National Wetland Park was chosen as the case study area,while the high-resolution remote sensing images of QuickBird in July,2003 and 2008,remote sensing data of Worldview-2 in July,2013,were collected as the main source of information.Entropy of land use was calculated to analyze the temporal-spatial change of land-use structure and driving factors.Study results showed that(1)with the advancement of project of returning people from wetland to land,returning cropland to forest and ecological recovery,the land-use types in the study area presented diversified trends during the period from 2003 to 2013;(2)entropy and equilibrium degree of land use in Xinjizhou had been rising from 2003 to 2013;(3)There was a slight difference of entropy in the spatial distribution in 2013,roughly showing an gradually increasing trend from the inside to outside with two lakes in the north and south as the distribution centers;(4)geographically weighted regression analysis showed that entropy was positively related with slope,road density,building distance and content of soil organic matter.The research results may provide a scientific basis for the formulation of sustainable management of the wetland park .

Key words: entropy, land use structure, Xinjizhou, temporal-spatial change