2003 Fiscal Year Final Research Report Summary
Surf zone observations with X-band radar system and moored video system
| Project/Area Number |
13450200
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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 |
水工水理学
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| Research Institution | University of Tsukuba |
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Principal Investigator |
TAKEWAKA Satoshi University of Tsukuba, Institute of Engineering Mechanics and Systems, Associate Professor, 機能工学系, 助教授 (80202167)
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| Co-Investigator(Kenkyū-buntansha) |
NISHIMURA Hitoshi University of Tsukuba, Institute of Engineering Mechanics and Systems, Professor, 機能工学系, 教授 (00010819)
KOBAYASHI Tomonao Gifu University, Graduate School of Engineering, Associate Professor, 工学部, 助教授 (50205473)
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| Project Period (FY) |
2001 – 2003
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| Keywords | X band radar system / Video imaging / Surf zone / Shoreline positions / Foreshore slopes / Remote sensing / Storm observation |
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| Research Abstract |
Measuring devices that are fixed to definite points are employed in the usual surf zone observations, which provide accurate time records of hydrodynamic items. The deployment of the instruments, however, is limited in most field experiments, which restricts the spatial understanding of the surf zone dynamics. In this context, a X-band radar system and moored video system are employed to obtain spatial data of the surf zone. Field experiments were conducted at HORS, a research pier located in Hasaki, Japan. Video and radar recording were conducted simultaneously to check the properties of radar echos. Frequent observations including several storm events were done with the radar. Results of the radar records demonstrated the potential of the system showing that the system is able to capture the run-up height of individual waves, longshore distributions of shoreline positions and inter-tidal foreshore slopes. Analyses of temporal variation of run-up positions revealed the existence of longshore propagation of edge wave. PIV analyses of instantaneous radar echo data showed the refraction pattern and depths inverted from local phase speeds of the waves
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