基于空间自相关分析的市域耕地空间格局演变分析——以洛阳市为例

Analysis of the Spatial Pattern Evolution of Cultivated Land in Municipalities Based on Spatial Autocorrelation Analysis——Luoyang City as an Example

  • 摘要: 以洛阳市耕地为研究对象,在GIS的基础上借助景观格局指数分析、核密度估计和空间自相关对洛阳市2009-2019年的耕地空间格局特征及其变化趋势进行分析.结果表明:(1)洛阳市在2009-2019年耕地面积先减少后增加,耕地的破碎度一直增强,且耕地在洛阳市的整体景观中占优势地位.(2)研究期间东北部市辖区外围的大部分地区和西南方栾川县的部分地区核密度高,栾川县的周围地区较为稀疏.耕地核密度高值和极高值区域呈现出先扩张后收缩的特征,低值区域在2014-2019年有所扩张.(3)洛阳市的耕地保有量具有显著的空间自相关性,并且自相关性逐年递增.在局部空间自相关分析中,“高-高”类型区聚集分布在洛阳市正北部和东北部的边界地带,“低-低”类型区集中在栾川县和嵩县以及洛阳市辖区,受地形和城市化影响较重.研究期间的扩张发生在洛阳市辖区,大部分由“高-低”类型区转来.

     

    Abstract: Taking cultivated land in Luoyang city as the research object, the characteristics of cultivated land spatial pattern and its change trend are analyzed from 2009 to 2019 based on GIS with the help of landscape pattern index analysis, kernel density estimation and spatial autocorrelation. Results show that: (1) The city of luoyang in 2009-2019, the cultivated land area decreases first increases, the cultivated land fragmentation has been enhanced, and the cultivated land in the city of luoyang in the dominant position in the landscape of the whole. (2) During the study period most of the outer municipal district in the northeast region and southwest parts of luanchuan county nuclear density is high, the surrounding areas of luanchuan county is relatively sparse. The areas with high and extremely high values of cultivated land kernel density first expanded and then contracted, while the areas with low values expanded from 2014 to 2019. (3) There is a significant spatial autocorrelation of cultivated land in Luoyang, and the autocorrelation increases year by year. In the local spatial autocorrelation analysis, the "high-high" type area is concentrated in the north and northeast of Luoyang, and the "low-low" type area is concentrated in Luanchuan county and Song county as well as the area under the jurisdiction of Luoyang city, which is heavily affected by topography and urbanization. During the study period, the expansion occurred in the district of Luoyang, most of which was transferred from the "high-low" type district.

     

/

返回文章
返回