Evaluating mitigation strategies for urban heat island in Mandaue City using ENVI-met

Mandaue is a crucial city in Cebu island, Philippines as it links other large metropolises and highly industrialized. The occurrence of urban heat island (UHI) was already confirmed by previous study. In this paper, we aim to determine how UHI could be improved mitigations including increasing vegetation, adding open spaces, employing green roofs and/or combination thereof. ENVI-met software utilized simulate two study sites: M. C. Briones street the planned development (PUD). To reduce computing load, further divided into 2 subareas PUD 4 subareas. Results simulation indicate that addition more spaces trees decrease air temperature 0.2 ​°C on average while roof an range ​°C–0.4 ​°C. When trees, grasses used, decreased 0.1 ​°C–0.3 Despite these mitigations, thermal comfort index would still greater than 26 which means majority people feel uncomfortable. On hand, surface 0.5 ​°C–0.8 conversion building have no effect. vegetation employed, 0.4 ​°C–1.1