An Observation of the Climatic Effect of Watering on Paved Roads

Growing cities have been deteriorating heat environment due to artificial coverage of the ground and artificial heat effluence. The authors focused on the watering on paved roads as one of elective and immediate measures against the situation and observed the elect on the micro climate in a city area in the last summer. The results showed that the difference in temperature and humidity at two points with and without watering were maximum 1.5 degree and 8%, respectively. In addition, the estimated heat balance at the points showed that the considerable latent heat and the lateral heat transport contributed to lower the surface temperature of the road due to watering.