Pervious (porous, permeable) pavements have positive influence on urban areas in terms of reducing surface runoff and mitigating urban heat island effects. However, infrastructures in subtropical/tropical regions like Taiwan are mostly at a shallow depth, which limits the depth that pervious pavements can use, and research results based on pervious pavements in countries of the temperate climate might not be applicable in Taiwan. Therefore, this study will focus on thin pervious pavements (~30 cm) commonly seen in subtropical/tropical regions like Taiwan, and take the thin pervious pavement on Zhong Xiao E. Rd. in Taipei as the study site. In this study, HYPROP is used to measure the soil water retention curve of each layer of pervious pavement structure, and the thermal conductivity coefficients of each layer are calibrated internally in HYDRUS. An optimization procedure is performed to deduce optimized vertical structure of the pervious pavement using real data, considering the goals of runoff reduction and/or temperature mitigation. This study provides a valuable guideline for both runoff reduction and/or temperature mitigation goals in pervious pavement in subtropical/tropical regions like Taiwan.
