基于GIS和PSR模型的沈阳市土地利用动态变化及生态安全评价

Study on Dynamic Change of Land Use and Ecological Security in Shenyang City Based on GIS and PSR Model

为定量分析沈阳市土地利用状况,并借助生态安全状况评估土地利用结果,以沈阳市Google Earth卫星遥感图像为数据基础,生成土地利用类型图,分析不同土地类型之间的转化情况以及转化数量,而后借助PSR模型完成对土地利用现状的生态安全评估。结果显示,研究期内的沈阳市处于城市化进程后期,土地利用发展状况呈不良发展趋势,土地利用结构的科学性仍有上升空间。从生态安全角度评估结果为,沈阳市生态安全无恶化趋势,这与当地的经济发展模式的转换有关,安全状态呈现出逐年上升趋势,从较不安全上升到了安全状态,总体趋于良好的发展势态。

In order to quantitatively analyze the land use situation in Shenyang and evaluate the land use results with the help of ecological security,taking Shenyang as the research object and Google Earth satellite remote sensing image as the data basis,the land use type map and land use transfer matrix are generated to analyze the transformation and quantity between different land types.Then the ecological security assessment of land use status is completed with the help of PSR model.The results show that during the study period,Shenyang is in the late stage of urbanization,the development of land use shows a bad development trend,and the scientificity of land use structure still has room to rise.From the perspective of ecological security,the assessment results show that there is no deterioration trend of ecological security in Shenyang,which is related to the transformation of local economic development model.The security state shows an upward trend year by year,from less secure to safe,and tends to be a good development trend as a whole.