基于Landsat影像的土地利用/覆盖变化研究——以吉林省汪清县为例

基于Landsat TM/OLI_TIRS 遥感影像数据，以汪清县为研究区域，利用RS和GIS技术，通过土地利用动态度模型、土地利用转移模型，以2004年为时间节点，分析1994-2014年间汪清县的土地利用/覆盖变化状况，利用灰色关联度模型对该变化的驱动力进行分析。结果表明，2004年以前，综合土地利用动态度为0.62%，空间变化差异明显，2004年后综合土地利用动态度降为0.56%，但空间变化差异逐步扩大，总体变化趋势放缓。1994-2014年间，林地面积总体减少，但2004年后呈增长趋势，变化程度较高的有裸地、草地及居民用地，每种土地类型都有不同数量的相互转化。驱动力分析表明，汪清县土地利用和覆盖变化是人口、经济等因子综合驱动的结果，不同土地类型变化的最主要的驱动因子有所差异。

Changes of Land Coverage and Land Use in the Wangqing County Based on RS and GIS

Taking Wangqing County as the study area,and 2004 as the time node,using the techniques of RS and GIS and the models of dynamic degree and transition of land use,the land use/land coverage were analyzed in study area between 1994 to 2014 based on Landsat TM/OLI_TIRS remote sensing data.Gray relational grade model was adopted to analyze the driving force of the change.The results showed that before 2004,comprehensive land use dynamic degree was 0.62%,differences in spatial changes were significant.After 2004,the figure reduced to 0.56%,but the difference in the spatial variation gradually expanded.In 1994-2014,forest area decreased,and presented growth trend after 2004.The changes of bare land,grassland and residential land were great,all land types transformed mutually.Land use and coverage changes in Wangqing County were driven by demographic,economic and other factors.The main driving factors among different land types were different.