The thermal environment in Recreational Open Spaces (ROS) is primarily a result of the surrounding built form which includes buildings, trees, and surface treatment materials. To study the impact of land surface treatment choice and urban form on the thermal characteristics of open spaces, a case study assessment was undertaken in the dense urban context of Mumbai, India. To study ROS and its thermal profile, we selected three open spaces adjoining a school in Mumbai exhibiting different surface material treatments and built form. A comparative analysis was done using ENVI-met model. The model outcomes were validated using field measurements. The results highlighted the significant impact of the land surface choice and vegetation on the ambient air temperature and surface temperature of ROS. Open spaces with concrete paving and open mud surface showed the air temperature about 3 °C and 1.5 °C higher than the surfaces covered with tree litter. During the evening, concrete surfaces showed that maximum surface temperature (Ts) was comparatively higher (4 °C), as compared to others. The inferences from this study would assist in appropriate policy formation and design guidelines that could favourably impact the thermal profile of ROS and aid in mitigating the urban heat island effect.

娱乐场所（ROS）的热环境主要是周围建筑形式（包括建筑物，树木和表面处理材料）的结果。为了研究土地表面处理选择和城市形态对开放空间热特征的影响，在印度孟买密集的城市环境中进行了案例研究评估。为了研究ROS及其热分布，我们选择了孟买一所学校附近的三个空地，这些空地具有不同的表面材料处理和建造形式。使用ENVI-met模型进行了比较分析。使用实地测量验证了模型结果。结果强调了土地表面选择和植被对环境空气温度和活性氧表面温度的重大影响。具有混凝土铺路的开放空间和开放的泥浆表面显示出的空气温度比覆盖有树木凋落物的表面高约3°C和1.5°C。到了晚上，混凝土表面的最高表面温度（Ts）相对较高（4°C）。这项研究的推论将有助于制定适当的政策和设计指南，从而有利地影响ROS的热剖面，并有助于减轻城市的热岛效应。