植被对盛夏西安温度/湿度的调节作用及其生态价值实验研究

通过观测盛夏西安市不同植被景观区的温度、湿度日变化 ,对各次观测实验数据进行比较 ,研究了植被对温度和湿度的调节作用 ,并计算出植被对温度调节作用的生态效益。结果表明 :( 1 )植被覆盖较好的比无植被覆盖的地区在降低温度和增加空气湿度方面 ,有显著的差异 ,植被覆盖区平均降低温度 2℃ ,降低极端温度为 3 .3℃ ,平均增大相对湿度大约为 3 0 %。( 2 )绿化较好地点的温度和湿度日变化幅度较小 ,绿化差的地点变化幅度较大。( 3 )有水面存在对周围环境的相对湿度也具有显著的影响。 ( 4)植被的降温作用 ,可创造经济价值。每年每公顷的绿地使年平均温度降低 1℃ ,其单位生态效益为 5.70元。因此 ,城市植被是调节城市温度和湿度的有效措施。通过绿化途径改变城市下垫面性质 ,从而达到改善西安市的热效应目的

Green Air-condition:Vegetation Adjusting Temperature/Humidity in Xi'an During Midsummer

According to temperature and humidity investigation at different vegetative coverage in xi'an,the effects of plants on the temperature and humidity were analyzed.The results showed that:a.The regions with better covered vegetation could decrecase the temperature and increase the humidity than those of no-vegetation covered;b.The daily variation range of the temperature and humidity in the regions of better covered vegetation is less than those of no-vegetation covered;c.waters effect the temperature and humidity of environment;d.The effects of vegetation on the temperature decrease had economic value.When temperature decrease 1℃,economic value increase 5.70 yuan.So ,vegetation could improve city's temperature and humidity. \ \