Abstract
Water absorbed permeable pavements have a high ability to maintain low temperature during summer time. But if the pavement has the same characteristics like as summer, it is undesirable for an urban thermal environment in winter. Field observations for 3 kinds of permeable pavements and 3 kinds of ordinary asphalt pavements were prepared to evaluate an urban thermal environment in winter. At the results, thermal radiation and temperature at the surface of permeable pavement was similar to ordinary pavements because of low evaporation rate. Furthermore, surface temperature of ordinary pavements showed the value under the freezing point at the daybreak, while that of permeable pavements keep nearly 0°C. Heat balance of pavement was estimated by using heat capacity method in winter.
