Spatiotemporal interaction pattern of the Beijing agricultural product circulation

Identifying the spatiotemporal interaction pattern of agricultural product circulation (APC) is crucial for resource adjustment and food security. Current studies are mostly based on static statistical data over an entire year or a specific period, which cannot describe spatial APC its seasonal variation fine scale. Thus, this study extracts trip chain national truck trajectory constructs flow network Beijing with city as unit season temporal unit. The in then analyzed from form, node function role, transportation corridors. results follows: (1) Compared methods data, proposed method provides more complete refined depiction APC. (2) involves 316 cities China, 143 play major role typical characteristics. These can be divided into perennial core cities, winter-spring, summer-autumn, contributing 2.6%–40.3% to (3) There 6 corridors Beijing-Tianjin-Hebei corridor coastal contribute 53.5% 12.8% annual supply, respectively, balanced supply all seasons. Beijing-Kunming Beijing-Guangzhou 14.3% 9.0%, much higher supplies winter spring. northeast northwest 7.3% 3.3%, mainly summer autumn. help deepen understanding patterns provide reference design optimization routes.