基于GIS的耕地变化时空特征及驱动力研究——以都匀市为例

Characteristics and Driving Force of Farmland Change Based on GIS- Taking Duyun City as an Example

以都匀市2010年、2020年两期遥感影像作为数据源,从土地利用变化动态度、土地利用转移矩阵、空间集聚度和景观格局4个方面分析了都匀市耕地时空变化特征,利用地理探测器探究影响其变化的驱动力因子,以期为耕地可持续利用和农业发展规划提供决策参考。研究结果表明:①2010-2020年,耕地面积共计减少12045.42 hm^(2),其变化动态度为-2.29%,主要转化为建设用地、林地、园地和水域;②在空间分布上,主要分布在市域东南部的匀东镇、小围寨、墨冲镇和归兰乡;随着城市建设发展耕地面积不断减少,分布越分散破碎;③研究期间耕地的聚集度降低,破碎度增强;④高程、坡度、年均气温、年降水量自然因子和人口密度社会因子是影响耕地空间变化的主要驱动因素。

Using the remote sensing images of Duyun City in 2010 and 2020 as data sources,the spatial and temporal change characteristics of cultivated land in Duyun City were analyzed from four aspects:dynamic attitude of land use change,land use transfer matrix,spatial agglomeration degree and landscape pattern,and the driving force factors affecting the change were explored by using geographic detector in order to provide a reference for the sustainable use of cultivated land and agricultural development planning.The results show that:①From^(2)010 to 2020,the cultivated land area decreased by 12045.42 hm^(2),and the changing attitude was-2.29%,which was mainly transformed into construction land,forest land,garden land and water area.②In terms of spatial distribution,it is mainly distributed in Yundong Town,Xiaweizhai,Mochong Town and Guilan Township in the southeast of the city;With the development of cultivated land area decreasing,the distribution is more scattered and broken.③During the study period,the degree of aggregation decreased and the degree of fragmentation increased.④Elevation,slope,annual average temperature,annual precipitation natural factor and population density social factor are the main driving factors affecting the spatial change of cultivated land.