2006 Fiscal Year Final Research Report Summary
Development of Thermoscape Control Methods with Green Space at District Scale and Establishing Planning System
| Project/Area Number |
16380022
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Horticulture/Landscape architecture
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| Research Institution | Chiba University |
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Principal Investigator |
TASHIRO Yoritaka Chiba University, Faculty of Horticulture, Professor, 園芸学部, 教授 (20188238)
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| Co-Investigator(Kenkyū-buntansha) |
KINOSHITA Takeshi Chiba University, Faculty of Horticulture, Associate Professor, 園芸学部, 助教授 (30282453)
AKASAKA Makoto Chiba University, Faculty of Horticulture, Professor, 園芸学部, 教授 (30143267)
KOBAYASHI Tatsuaki Chiba University, Faculty of Horticulture, Associate Professor, 園芸学部, 助教授 (40178322)
YANAI Shigeto Chiba University, Graduate School of Science and Technology, Associate Professor, 大学院・自然科学研究科, 助教授 (30241946)
FURUTA Katsunori Chiba University, Graduate School of Science and Technology, Associate Professor, 大学院・自然科学研究科, 助教授 (10238694)
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| Project Period (FY) |
2004 – 2006
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| Keywords | On-netsu-kei (=thermoscape) / Thermoscape / Urban green space / District / Thermal Environment / Greenery landscape / District plan / Thermal comfort |
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| Research Abstract |
The types of ground cover to stimulate high temperature and to cool down the air in summer time were specified, and the effects were made clear quantitatively through making and analyzing energy radiation map of some residential areas and street spaces. In addition, using energy radiation map we grasped some information on a possibility to control heated landscape elements by distributing greenery to control thermal environment or thermoscape. It was estimated that securing medium-level or high-level tree shades and covering the ground with lawns or non-pavement reduced heat storage to the underground. And it was made clear that when the difference of temperature between the air temperature and surface are big, and radiant heat conduction is big, distributing appropriate greenery could reduce the energy radiations from each landscape elements.
Furthermore, a planting design (green form at district scale) to control thermoscape was made clear through evaluating the characteristics of tre
… More
e shaded area from the viewpoint of shade change, tree form (according to species and planting density), and tree shade effect in the tropics. Concretely, a tree-shaded area is particularly significant in the daytime to support human activities, because a tree shaded area creates minimum size shade as large as tree crown. A spatial form of tree-shaded area is decided with tree size (medium or large size according to height and crown of the tree). Full Shade is formed with densely planting (dark tree shade and layering of the tree crowns), and Not Full Shade is formed with s sparse grove (slightly dark tree shade and touches of tree crowns). On the other hand, separated planting does not create tree-shaded area (tree crowns are apart from each other and the ground surface is bright). Trees with densely leaves and spreading branches are particularly suitable for a design of tree-shaded area. Tree-shaded areas of the tropics (especially high noon) play a significant role to offer thermal comfort to human activities by continuing the shade. Less
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