蒸发及绿化对夏日株洲城市温度的影响分析

Influence of Evaporation and Vegetation on Urban Temperature of Zhuzhou City

研究了夏日株洲市蒸发及绿化对温度的影响。环境湿度过大或过小时,蒸发的降温效果都会被减弱。依靠近地层的蒸发来降温效果并不好,利用绿化来降温的效果要强得多。

Study was made on the influence on temperature by evaporation and vegetation in summer in Zhuzhou city. The results showed that the temperature near the ground was the main factor influencing the evaporation. When the gap of evaporation rate was 0.607 g(/cm 2 ·h),it led to a temperature gap of 0.5 ℃ on average at 0.5m above the concrete ground. It was not efficient to decrease temperature in the summer only by means of water evaporation. It is more efficient to reduce temperature in the street in the summer by increasing vegetation cover. When humidity was too high or too low, the temperature-decreasing efficiency of evapora- tion became much weak.