基于地理探测器的环四川盆地地质公园空间分布的影响机制分析

Analysis of Influence Mechanism on Spatial Distribution of Geoparks around Sichuan Basin Based on GeoDetector

为了探索环四川盆地区域内地质公园空间分布的影响因素,以及量化研究各影响因素对地质公园空间分布的影响程度,基于环四川盆地2000—2019年的地质公园数据,采用地理统计的方法研究该区域地质公园的时空分布特征。研究表明:环四川盆地的地质公园空间分布表现为两个特征:(1)在2005—2019年间,环四川盆地地质公园的空间分布类型为离散分布,总体具有“东多西少”的分散分布状态。(2)在时间变化上呈现出明显的阶段特征,即2005—2010年为空间分布较为分散的缓慢发展期和2010—2019年为多核形成的快速发展期。在此基础上,结合地理探测器模型和Pearson相关系数法进一步量化研究地质公园空间分布的影响机制。(3)各影响因子的影响强度大小依次为:年降水量>高程值>土壤类型>地质环境分区>公路里程>人均GDP>地貌类型。(4)各影响因子的相关性大小排序为:年降水量、人均GDP和公路里程数对地质公园的建设与发展有促进作用,高程值与地质公园的发展存在负相关关系。

In order to explore the influencing factors of the spatial distribution of geoparks in the area around Sichuan Basin and quantitatively study the influence degree of each influencing factor on the spatial distribution of geoparks,based on its geopark data from 2000 to 2019,the spatial and temporal distribution characteristics of geoparks in this region are studied by geostatistics.On this basis,the influence mechanism of the spatial distribution of geoparks is further explored by combining the GeoDetector and Pearson correlation coefficient.The research shows:(1)From 2005 to 2019,the spatial distribution type of the geoparks around the region around Sichuan Basin is discrete,with a scattered distribution of"more in the east and less in the west".(2)In terms of time change,it shows obvious stage characteristics,that is,the slow development period with relatively scattered spatial distribution from 2005 to 2010 and the fast development period with multi-core formation from 2010 to 2019.(3)The influence intensity of each influence factor is in order:annual precipitation>elevation value>soil type>geological environment division>highway mileage>per capita GDP>landform type.(4)The order of correlation of each influencing factor is:the annual precipitation,per capita GDP and highway mileage promote the construction and development of the geopark,and the elevation value has a negative correlation with the development of the geopark.