草坪砖植草退化后对热效应的贡献变化

Change of the grass brick surface material's thermal contribution to surrounding environment after grass degeneration

草坪砖作为城市下垫面常用铺装材料,其草坪维护是重点问题,草坪退化后除美观受影响外,是否对周围环境热效应的贡献产生变化是研究的重点。对草坪砖、植草退化后的草坪砖、混凝土地砖3种常用铺装材料的地表温度、气温、辐射进行了一年的连续测量,分析了3种下垫面的温度和气温变化情况及其影响因素,比较了3种下垫面间的温度差异性,分析了地表温度与气象因子的相关程度;建立了3种铺装材料地表温度与气温的一般线性模型。结果表明,1)草坪砖与退化后草坪砖铺装对周围环境热效应的贡献差异不显著(P>0.05);2)草坪砖、退化草坪砖两者对周围环境热效应的贡献与混凝土地砖铺装对周围环境热效应的贡献差异都显著(P<0.05);3)模型通过了检验,且地表温度和气温拟合优度较高,可通过模型计算3种铺装材料地表温度,由模型中系数大小得知,随太阳辐射增强地表温度变化幅度由小到大依次为草坪砖<退化草坪砖<混凝土地砖。

Grass brick is a frequently used material of urban ground surface.The maintenance of the grass is a big problem after establishment.Whether the degenerated grass brick has different thermal contribution to surrounding environment or not is the key point of the study.Based on the observedone year＇data of 3frequentlyused surface materials including grass brick,degenerated grass brick and concrete brick＇s,the annual temperature variations,relevant level of meteorology factors and influence factors of the land surfaces were analyzed;The general linear model was established based on three surface materials and the monthly temperature of the year.The results are as follows：1）The difference of thermal effects on surrounding environment between grass brick material and degenerated grass brick material is not significant;2）Both the grass brick and the degeneratedgrass brick material have significant differences with the concrete brick material.3）The general linear model passed the check and the match accuracy between the surface and the air temperature is high.The surface temperature can be calculated through the model.The coefficient represent the surface temperature＇s rising range with the increase of solar radiation.The rank of rising range is as follows：grass brick〈degenerated grass brick〈concrete brick.