武夷学院学报

针对城市化进程中自然下垫面硬化，导致城市热岛效应加剧这一问题，选取福州地区某商住小区为案例，运用集总参数法分析透水下垫面比例对居住区室外热环境的影响。结果显示：透水下垫面通过促进地表水分的蒸发，有效降低地表及其周边环境的温度，对缓解城市热岛效应展现出积极的效应。当透水面积比例从0%提升至50%时，室外空气逐时空气干球温度呈现显著下降趋势，平均热岛强度减弱1.58℃,湿球黑球温度下降1.18℃。为更全面地揭示场地内部不同下垫面条件下的温度分布特征，并验证集总参数法的计算结果，采用计算流体动力学CFD软件对温度场进行补充分析。两种方法计算结果偏差小于1%,且透水下垫面区域的平均温度显著低于不透水路面，进一步证实了透水下垫面对缓解城市热岛效应的有效性。

With the acceleration of urbanization, the hardening phenomenon of natural underlying surfaces has intensified the urban heat island effect. In response to this issue, taking commercial and residential communities in Fuzhou as a case study, the lumped parameter method is used to analyze the impact of the proportion of permeable underlying surfaces on the outdoor thermal environment of residential areas, aiming to provide theoretical basis and data support for the construction of sponge cities in residential development projects. The results show that the permeable underlying surface effectively reduces the temperature of the surface and its surrounding environment by promoting the evaporation of surface water, demonstrating a positive effect on alleviating the urban heat island effect. When the proportion of permeable undelying surface increases from 0% to 50%, the hourly outdoor air dry-bulb temperature shows a significant downward trend, with the average heat island intensity decreasing by 1.58 ℃ and the wet-bulb black-bulb temperature decreasing by 1.18 ℃. In order to comprehensively reveal the temperature distribution characteristics under different underlying surface conditions within the site and verify the calculation results of the lumped parameter method, CFD software was introduced to supplement the analysis of the temperature field. The deviation between the two methods' calculation results was less than 1%, and the average temperature in the permeable underlying surface area was significantly lower than that of the hard road surface, further confirming the effectiveness of the permeable underlying surface in alleviating the urban heat island effect.