Densification of cities threatens the provision of public open space for people living in and around cities. The increasing evidence of the many benefits of recreational walking for physical and mental health during the COVID-19 pandemic has highlighted an urgent need for fostering the availability of public open space. In this context, urban planners need information to anticipate recreational needs and propose long-term, resilient solutions that consider the growing demand driven by increasing urban population and intensified in times of crisis such as the recent pandemic. In this paper, we harness the unique large MOBIS:COVID-19 GPS travel diary data on mobility behaviour collected during a normal baseline period and during the first wave of the Covid-19 pandemic in the Canton of Zurich Switzerland. We estimate a sufficiency rate that allows to geolocate locations where the demand for public open space is higher than the available offer. In a second step, we explore if preference patterns for recreational areas have changed during the pandemic. Results indicate that the main cities and important towns in the case study area are saturated by current demand, and that the pandemic has amplified the problem. In particular, urban dwellers look for tranquil areas to recreate. Such information is crucial to guide decision-making processes for planning the cities of the future.

城市的致密化威胁到为居住在城市及其周围的人们提供公共开放空间。越来越多的证据表明，在 COVID-19 大流行期间休闲步行对身心健康有诸多好处，这突出表明迫切需要促进公共开放空间的可用性。在这种情况下，城市规划者需要信息来预测娱乐需求，并提出长期的、有弹性的解决方案，这些解决方案要考虑到城市人口不断增加所推动的不断增长的需求，以及在最近的大流行病等危机时期加剧的需求。在本文中，我们利用了独特的大型 MOBIS：COVID-19 GPS 旅行日记数据，了解在正常基线期间和瑞士苏黎世州 Covid-19 大流行第一波期间收集的移动行为。我们估计了一个充足率，允许对公共开放空间需求高于可用空间的位置进行地理定位。第二步，我们探索在大流行期间对休闲区的偏好模式是否发生了变化。结果表明，案例研究区域的主要城市和重要城镇的当前需求已经饱和，而大流行病加剧了这一问题。特别是，城市居民寻找宁静的地方进行再造。这些信息对于指导未来城市规划的决策过程至关重要。结果表明，案例研究区域的主要城市和重要城镇的当前需求已经饱和，而大流行病加剧了这一问题。特别是，城市居民寻找宁静的地方进行再造。这些信息对于指导未来城市规划的决策过程至关重要。结果表明，案例研究区域的主要城市和重要城镇的当前需求已经饱和，而大流行病加剧了这一问题。特别是，城市居民寻找宁静的地方进行再造。这些信息对于指导未来城市规划的决策过程至关重要。