Track 4: Innovations Driving for Greener Policies & Standards Session 1.6 Innovations Driving for Greener Policies and Standards – Microclimate The Potential of Applying Local Climate Zone for the Sustainable Planning in Urban Built Environment

Inspired by the increasing urbanization and urban heat island effect (UHI) issues, an innovative concept called Local Climate Zone (LCZ) was developed to standardize and classify various built environment. The LCZ system was use to evaluate the relationship between UHI and urban characteristics which included land cover, sky view factor (SVF), building height, surface albedo and roughness. Due to the previous research had revealed the LCZ system were highly related with the micro-climate condition, this work attempt to apply the LCZ into consideration of adapt the sustainable planning in urban built environment by comprehend the relevance between the thermal load and the LCZ distribution. The Tainan city was selected to be the study area because of the growing thermal stress and the reduction of ventilation path in the rapid urban development. In term of the LCZ classify method, the World Urban Database and Portal Tool (WUDAPT) was applied through the Landsat satellite image to make a wild range LCZ distribution map in an efficient way. In this study, there are two main issues discussed in the study. Firstly, to identify the LCZ by several methods and confirm if it is correct in reality. Secondly, to propose a method to quantify the thermal conditions in different LCZs in the urban area. The analytical results indicated that the WUDAPT may overestimate the building height compared to the actual height by the building digital map. It may due to the resolution in the satellite image is insufficient and the areas with small amounts of tall buildings will be still regards as compact high-rise areas. Concerning the thermal conditions in various LCZ, it is obvious that the highly developed urban areas, such as LCZ2 (Compact mid-rise) and LCZ3 (Compact low-rise) have a higher thermal stress distribution, while the natural areas such as LCZ 6 (Open low-rise), LCZ 9 (Sparsely built), got lower PET value based on the measured data. The result will contribute to the urban climate study and benefit to the sustainable development in the urban areas.