摘要
步行出行与老年人身体活动水平、身心健康状态有着密切联系。以贵阳市为例,基于市中心城区老年人步行出行问卷数据,利用极端梯度提升模型(XGBoost)对山地城市建成环境与老年人步行距离之间的非线性关系进行探究。结果表明:山地城市建成环境特征不同对老年人步行距离产生的非线性影响和阈值效应存在差异,其中坡度在建成环境变量中的影响最突出;贵阳市狭小有限的土地利用面积使路网、人口及居住密度提高对老年人步行出行反而产生负向影响,因此在山地城市建设中,需要因地制宜适当增加路网、人口及居住密度以促进老年人步行出行;山地城市基础服务设施数量及完善度是影响老年人步行活动的重要因素。研究结果可为山地城市交通政策制定与适老社区建设提供参考。
Walking is closely related to the physical activity level and physical and mental health of the elderly.By taking Guiyang City as an example,this paper uses extreme gradient boosting(XGBoost)to explore the nonlinear relationship between the built environment of the mountainous cities and the walking distance of the elderly based on the questionnaire data of the downtown area of Guiyang.The results show that there are differences in the nonlinear effects and threshold effects of the built environment on the walking distance of the elderly in mountainous cities,and the slope is the most prominent variable in the built environment.The small and limited land use area of Guiyang city makes the increase of road network,population and residential density have a negative impact on the walking of the elderly.Therefore,in the construction of mountainous cities,it is necessary to appropriately increase road network,population and residential density according to local conditions to promote the walking of the elderly.The quantity and perfection of basic service facilities in mountainous cities are important factors affecting the walking activities of the elderly.The results of this study can provide a reference for the formulation of urban transportation policy and the construction of aged communities in mountainous cities.
作者
何莎
赵航
黄勇
熊仁江
HE Sha;ZHAO Hang;HUANG Yong;XIONG Renjiang(School of Geographic&Environment Science,Guizhou Normal University,Guiyang,Guizhou 550025,China)
出处
《贵州师范大学学报(自然科学版)》
北大核心
2026年第1期98-107,共10页
Journal of Guizhou Normal University:Natural Sciences
基金
国家自然科学基金项目(71864008)。
