关中平原城市群“五一”假期城际出行网络格局

Characteristics of Intercity Travel Network During the May Day Holiday in the Guanzhong Plain Urban Agglomeration

为探究关中平原城市群城际出行时空格局,基于2021年“五一”假期的百度迁徙数据,从城市节点、城际联系、网络集聚3个层面挖掘节假日背景下关中平原城市群城际出行网络格局,以揭示城际居民在时间、空间上的移动规律。研究发现假期期间,城际居民出行呈“U”形变化趋势,城际出行网络具有等级规模性,88%的城际客流都分布在200 km的出行距离中,形成了3个凝聚子群。结果表明:①“五一”假期关中平原城市群城际出行需求具有时间对称性,空间分布呈现中间高、两翼低的特征,城际出行网络空间形成以西安为中心,宝鸡、咸阳、渭南为次中心的“一大三小”的发展模式;②城际客流联系具有极化现象,且空间近邻性特征显著,城际客流运输通道主要位于陕西省境内,短距离出行集中,整体上形成以西安为中心的放射性出行模式;③关中平原城市群城际出行省内联系较强。

This paper is to explore the spatiotemporal pattern of intercity travel in the Guanzhong Plain Urban Agglomeration.Based on Baidu migration data during the May Day holiday in 2021,this paper explores the intercity travel network pattern of the Guanzhong Plain urban agglomeration in the context of holidays from three levels:urban nodes,intercity connections,and network agglomeration,revealing the temporal and spatial movement patterns of intercity residents.Research has found that during holidays,intercity residents'travel shows a"U"shaped trend,and the intercity travel network has a hierarchical scale.88%of intercity passenger flow is distributed over a travel distance of 200km,forming three cohesive subgroups.The results indicate that:①The intercity travel demand of the Guanzhong Plain urban agglomeration during the May Day holiday has a temporal symmetry,with a spatial distribution characterized by high in the middle and low on both wings.The intercity travel network space forms a development model of"one large and three small"with Xi'an as the center and Baoji,Xianyang,and Weinan as the sub centers;②The intercity passenger flow connection exhibits polarization phenomenon and significant spatial proximity characteristics.The intercity passenger transportation channel is mainly located within Shaanxi Province,with concentrated short distance travel,forming a radiation travel mode centered around Xi'an as a whole;③The intercity travel of the Guanzhong Plain urban agglomeration has strong connections within the province.