1990—2020年铁岭县地表覆盖时空变化特征

Spatio-temporal Change Characteristics of Land Surface Cover in Tieling County from 1990 to 2020

地表覆盖变化已成为全球变化研究的核心领域和热点问题之一。本研究以Landsat系列卫星影像为主要数据源,提取铁岭县1990—2020年地表覆盖变化图斑,构建土地利用变化转移矩阵,对铁岭县地表覆盖变化情况进行时空分析,识别土地利用变化热点区域。结果表明,1990—2020年铁岭县地表覆盖面积呈现“四增两减”特征,其中增加和减少面积最大的地表覆盖类型分别是建设用地(增加85.27 km^(2))和林地(减少91.14 km^(2)),其他几种地表覆盖类型动态变化不明显。说明1990—2020年研究区域地表覆盖类型受人类活动的影响较为明显。本研究结果对于揭示地表覆盖变化规律具有重要意义。

The changes in land surface cover have become one of the core areas and hot topics in global change research.Utilizing the Landsat series satellite images as the primary data source,this paper extracted land surface cover change patches of Tieling County from 1990 to 2020.A land use change transition matrix was constructed to conduct spatio-temporal analysis of land surface cover changes and identify hotspots of land use change in Tieling County.The results showed that from 1990 to 2020,land surface cover area of Tieling County showed a"four increases and two decreases"characteristic.The land surface cover types having the most significant increases and decreases were construction land(increased by 85.27 km^(2))and forest land(decreased by 91.14 km^(2))respectively,while the dynamic changes of other land surface cover types were not significant.The land surface cover types in the study area were significantly influenced by human activities during 1990-2020.The research results was of great significance for revealing the patterns of land surface cover changes.