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Auflistung nach Autor:in "Shibaike, Hideki"

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  • Konferenzbeitrag
    Study on Influence of the Change of Land Cover Ratio on Urban Thermal Environment – No.1 Analysis by Mean of the Meso-scale Numerical Simulation Model
    (Informatics for Environmental Protection - Networking Environmental Information, 2005) Shibaike, Hideki; Itemadani, Kazuya; Takebayashi, Hideki
    Summer effects as well as winter influences of architectural counter measures for summer urban climate mitigation are numerically evaluated by using the meso-scale CFD model. In order to confirm the solution accuracy of the model, sensitivities of numerical results to the discretizations of time and space are examined. Then, numerical simulations are carried out for which each of the counter measures among high reflectivity land cover, exterior thermal insulation, reduction of anthropogenic heat release and rooftop green is considered for the area of Kyoto and Osaka City. In summer results, counter measures show obvious effects of temperature reduction, however the dominant period and magnitude is different from each other. High reflectivity land cover and rooftop green show significant temperature decrease in daytime, on the other hand, exterior thermal insulation shows it in nighttime.
  • Konferenzbeitrag
    Study on Influence of the Change of Land Cover Ratio on Urban Thermal Environment – No.2 Analysis by Mean of the Local Scale Numerical Simulation Model
    (Informatics for Environmental Protection - Networking Environmental Information, 2005) Takebayashi, Hideki; Shibaike, Hideki
    The characteristics of land covers in the central part of Kyoto City are analysed by using the Ikonos data with 4m resolution. Albedo is presumed from panchromatic data. It is confirmed that albedo of the elementary school yard is high, and that of the tiled roof on the wooden house is low. It is confirmed from NVI image data that the green ratios in the imperial palace, the castle, parks, slopes, temples, and shrines are high. The parameters of ground surface heat budget are set by using Ikonos data, and the thermal environment in the central part of Kyoto City in summer is analysed using the local scale numerical simulation model. Based on an analytical result of the Ikonos data, it is calculated to improve albedo of the tiled roof on the wooden house, and the impacts on the thermal environment are analysed.