樹木, 芝生の微気象調節効果に関する実証的研究

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書誌事項

タイトル別名
  • A Quantitative Study on the Effect of Micro-Climate Control by an Existence of the Tree and the Lawn Area
  • ジュモク シバフ ノ ビキショウ チョウセツ コウカ ニ カンスル ジッショウ

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抄録

In this Investigation, we tried to calculate the difference in temperature and humidity between areas with the single-grown tree and the lawn area, and the artificially surfaced area.<BR>The results of the measurement may be summarized as follows:<BR>1) Comparing the micro-climate under the tree with that of the open ground, under the tree the atmospheric temperature is an avarage 0.2°C lower and the humidity is an average 1.0% higher than that of the open ground through a seven month period (June-December). In the daytime of summer, the difference of these are the most remarkable, under the tree the temperature is 1.0°C lower and the humidity is 3.0% higher than than that of the open ground.<BR>2) During the daytime of summer, the surface temperature of the shade created by the tree was 4.5°C to 16.5r lower than that of the adjacent open ground.<BR>3) The surface temperature of the canopy of the tree is some little higher than the atmospheric temperature even in summer, and the difference of the temperature between different tree species is below 3.0°C, but the surface temperature of the canopy is 16. 2°C to 17.0°C much lower than that of the artificial covering objects such as a roof of the structure or an asphalt pavement.<BR>4) During the daytime of summer, the surface temperature of the lawn area is about 19.0°C lower on the average and 22, 0°C lower on a maximum than that of the asphalt pavement, and it is also about 16.0°C lower on the average and 18.6°C lower on a maximum than that of the bare ground. On the one hand, during the daytime of winter, the surface temperature of the lawn area is 6.0°C higher on the average and 14.4r higher on a maximum than that of the asphalt pavement, and it is also 3.0°C higher on the average and 6.5 °C higher on a maximum than than that of the bare ground. A disparity in the surface temperature between summer and winter was 19.3°C on the lawn, 39.6°C on the asphalt pavement and 37.1°C on the bare ground.<BR>5) The date showed that the surface temperature of the lawn withered by trampling, disease or drought became 1.5°C to 13.2°C higher than that of lively one during the daytime of summer<BR>6) Regardless of the seasons, the surface temperature of an artificial lawn rise extremely high in sunny day. During the daytime of summer, a maximum surface temperature of the artificial lawn rise up to 73.0°C, it is rare that the surface temperature of artificial lawn rise up to more than twice as high as that of the lawn. The surface temperature of the artificial lawn don't fall in the night and it never fall down to below 30.0°C in summer.<BR>7) The difference on the surface material of the ground not only influence considerably the difference of the surface temperature but also the temperature and the humidity at height of 30 to 50cm from the ground surface.

収録刊行物

  • 造園雑誌

    造園雑誌 46 (3), 161-175, 1982

    社団法人 日本造園学会

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