| Project/Area Number |
20380088
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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 |
Forest science
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| Research Institution | Shizuoka University |
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Principal Investigator |
MIZUNAGA Hiromi Shizuoka University, 農学部, 教授 (20291552)
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| Co-Investigator(Kenkyū-buntansha) |
UCHIDA Takanori 九州大学, 応用力学研究所, 助教 (90325481)
SAITO Satoshi 独立行政法人森林総合研究所, 植物生態研究領域, チーム長 (30353692)
王 権 静岡大学, 農学部, 准教授 (50402235)
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| Co-Investigator(Renkei-kenkyūsha) |
KAMIMURA Kana 独立行政法人森林総合研究所, ポストドクター研究員 (40570982)
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| Project Period (FY) |
2008 – 2010
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| Project Status |
Completed (Fiscal Year 2010)
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| Budget Amount *help |
¥18,850,000 (Direct Cost: ¥14,500,000、Indirect Cost: ¥4,350,000)
Fiscal Year 2010: ¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
Fiscal Year 2009: ¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2008: ¥11,180,000 (Direct Cost: ¥8,600,000、Indirect Cost: ¥2,580,000)
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| Keywords | 風害 / 林冠分断-修復 / 森林施業 / 流体力学 |
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| Research Abstract |
Our objective is to evaluate the risk of wind damage quantitatively in relation to canopy dynamics caused by various forest managements.
1) The evaluation of wind damage risks in individual tree scale : We clarified the effect of soil water condition on root anchorage. We also found the proportion of crown size to diameter at breast height is an effective index of resistance of trees against wind damages.
2) The evaluation of the risks in stand scale : We determined Cd (drag coefficient of wind load) of Japanese cypress, and developed the model predicts the unstable wind velocity on the canopy surface through combining with canopy topography and LES method. The large discrepancy between actual observation and classical logarithm law with respect to the vertical wind profiles in strong wind conditions from wind speed observation above the canopy of cypress plantations.
3) The evaluation of the risks in landscape scale : We analyzed the topographic factor on generation mechanism of the wind damage through combining the simulation by the meso-scale climate model and numerical wind synopsis technology.
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