3D-CAD MODELING OF A SUBSTANTIAL URBAN AREA AND HEAT ISLAND POTENTIAL OF URBAN BLOCKS IN SUMMER : Analysis of the thermal environment in a substantial urban area with regard to land use and land cover using numerical simulation Part 1

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  • 実在市街地の3D-CADモデリングと夏季における街区のヒートアイランドポテンシャル : 数値シミュレーションによる土地利用と土地被覆に着目した実在市街地の熱環境解析 その1
  • 実在市街地の3D-CADモデリングと夏季における街区のヒートアイランドポテンシャル--数値シミュレーションによる土地利用と土地被覆に注目した実在市街地の熱環境解析(その1)
  • ジツザイ シガイチ ノ 3D CAD モデリング ト カキ ニ オケル ガイク ノ ヒートアイランド ポテンシャル スウチ シミュレーション ニ ヨル トチ リヨウ ト トチ ヒフク ニ チュウモク シタ ジツザイ シガイチ ノ ネツ カンキョウ カイセキ ソノ 1

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The purpose of this study is to analyze the characteristics of a thermal environment in a substantial urban area by numerical simulation. First, we proposed a method for the gathering of spatial geometry and material data in a substantial urban area and developed a 3D CAD model, which was sufficiently accurate for the calculation of heat transmission. Then, we calculated the surface temperature for every urban block by using the numerical simulation on the assumption of a clear sky day in summer in Tokyo. Further, we ascertained the Heat Island Potential (HIP) for every urban block, which was an index of the sensible heat flow rate on all surfaces. The results indicated that the variation in HIP of 36 urban blocks were large not only in the day but also in the night. Furthermore, it was shown that every block group classified by land use type exhibited a characteristic tendency of the diurnal change in HIP, and that the varied land cover resulted in the differences in HIP in the same land use type group.

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