Simulation of greenbelts effect on meteorological environment in urban planning
The vegetation types have great effect on urban meteorological environment. We aim to investigate the feasibility to study this effect using a regional boundary layer model. Beijing is taken as an example. We simulate how the greenbelts and their types affect the meterological environment in Beijing in winter and summer with the city design data and the afforesting plans which are in discussion. The interactions of the surface-atmosphere processes are ananlyzed to investigate the effects on the meterological environment of the changes of surface flux. It shows that the regional boundary layer model can simulate the effect of greenbelt on urban meteorological environment well. The simulated results show that both the increase of forests and the increase of lawn can reduce the surface wind speed about 0.5m/s; in winter, the increase of forests or lawn in the north of Beijing leads to a temperature increase in daytime and decrease in night of 0.5 ～ 1℃, the effect of greenbelt in southeast of Beijing is little; in summer the increase of forests and lawn in the north of Beijing leads to a tempearature decrease less than 2℃ and can weaken the high temperature in Beijing in daytime.
NETL
NSTL
万方数据
维普
