| Project/Area Number |
08650602
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
水工水理学
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| Research Institution | KYOTO UNIVERSITY |
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Principal Investigator |
YAMASHITA Takao Kyoto University, Disaster Prevention Research Institute, Associate Professor, 防災研究所, 助教授 (30111983)
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| Project Period (FY) |
1996 – 1997
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| Project Status |
Completed (Fiscal Year 1997)
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| Budget Amount *help |
¥2,100,000 (Direct Cost: ¥2,100,000)
Fiscal Year 1997: ¥700,000 (Direct Cost: ¥700,000)
Fiscal Year 1996: ¥1,400,000 (Direct Cost: ¥1,400,000)
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| Keywords | Storm Surges / Typhoon Models / Numerical Prediction / Wind Field on the Sea / Sea Surface Stresses / MASCON Model / モデル台風 / 波浪 |
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| Research Abstract |
Storm surge simulation in small closed basins surrounded by mountains such as Osaka Bay is difficult-especially in the wind field prediction or simulation, which is affected by complex land topography. Fujita's typhoon model has been traditionally employed for the estimation of typhoon fields in Japan.
Yoshizumi (1968) proposed a typhoon wind field model which describes the lower-layr winds in a moving typhoon with consideration of surface friction. It is employed here to estimate the typhoon wind field taking into account the effect of friction. As the wind field described by Yoshizumi's model does not include the effect of land topography, we introduce the 'MASCON' (mass conservation) model to take into account the effects of deceleration and acceleration of wind velocity due to land topography, in this research.
This is a new model of typhoon wind field which is developed here by combining the Yoshizumi's and MASCON models. The pressure field is formulated by Schloemer's equation which assumes a symmetric pressure pattern.
A study on advancement in numerical models for storm surge prediction was carried out by means of numerical simulations of storm surges in which new model of typhoon wind field (MASCON-Y Model) was employed. Its validity was examined by hindcast of storm surges caused by Typhoons 9426,6523 and 6118 in Osaka Bay, the Isewan Typhoon in Ise Bay.
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