A Numerical Model Analysis on the Heat Island in Medium-Sized City

Abstract

Nowadays, it is confirmed that the heat island is formed even in the small city. In this study, we performed simulation for Yatsushiro city that is a middle-scale city in Japan with a population of about 130,000 people. We performed the numerical model simulation that is considered to buildings and land usage. The temperature distribution of urban heat island is affected by winds, its turbulence energies causing from buildings and. land use. One of the features is confirmed that the temperature of central part of city becomes higher than the surround since the hot wind converges the center. However, the water around the site of castle park in the center of a city is effective as the cool spot..