基于 ENVI-met 的透水路面对微区域气候影响的模拟分析

In order to research the mitigation of permeable asphalt pavement and refleetive coating pavement on the heat island effect in summer and the extreme low temperature in winter, taking the campus environment of a university in Harbin as the research object, the temperature distributions and ehanges of 4 kinds of asphalt concrete pavements (completely impermeable, 10% porosity permeable, 20% porosity permeable and 20% porosity permeable with refleetive coating) in the micro-regional climate under the conditions of different temperatures in summer and winter are simulated and analysed by using the ENVI-met micro-regional weather Simulation Software. The result shows that (1) at high temperatures, with the increase of the porosity of permeable asphalt pavement, the Volumetrie specific heat and thermal conduetivity decrease, and the mitigation effect on the heat island effect enhances, which is manifested by the decrease of pavement average temperature and the decrease of the area of local high temperature region; (2) at low temperatures, with the increase of the porosity of permeable asphalt pavement, the mitigation on extreme low temperatures increases, which is manifested by the increase of average temperature of road surface and the decrease in the area of local low temperature region; (3) the refleetive coating on the permeable pavement can significantly increase the reflectivity of the permeable pavement, it can slow down the heat island effect at high temperatures, but it will aggravate the extreme low temperature conditions; (4) through the improvement of micro-area elimate, permeable asphalt concrete pavement can play a certain role in reducing energy consumption, further reducing carbon emissions, which is conducive to environmental protection.