<紀要論文>
5種類の被覆材料による地表面熱収支の長期観測

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概要 Heat balance on a ground surface is one of the greatest element in urban thermal environment. Ground surface samples are made of five covering materials. They are bare ground, lawn, concrete, asphalt ...and permeable asphalt. Temperature and heat flux on the surface, temperature in the soil and several meteorological elements are measured in and around these samples consecutively. The annual fluctuation of temperature in the soil, the heat balance and the evaporation on the surfaces and so on are examined in this paper. Principal conclusions are as follows: (1) The daily average surface temperatures on the lawn and the bare ground are lower than those on the other artificial materials by 7-10℃ in summer. (2) The soil temperatures at the depth of 80cm under the lawn and the bare ground are lower than those under the other materials by 3-5℃ all year long, (3) The evaporation on the bare ground surface has great influence on the surface temperature. When it is large, the increase of the surface temperature by solar radiation is mitigated. (4) The unpermeable materials can not keep precipitation. The cooling effect by evaporation on these surfaces are hardly found.続きを見る

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登録日 2010.06.11
更新日 2020.12.09

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