| URN |
etd-0823114-154533 |
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| Author |
Hao-Chung Ku |
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| Author's Email Address |
No Public. |
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| Statistics |
This thesis had been viewed 5576 times. Download 675 times. |
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| Department |
Marine Environment and Engineering |
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| Year |
2014 |
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| Semester |
1 |
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| Degree |
Master |
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| Type of Document |
|
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| Language |
zh-TW.Big5 Chinese |
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| Title |
Experimental study on the measurement of reflection coefficient by Goda method for sloping beach |
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| Date of Defense |
2014-09-12 |
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| Page Count |
87 |
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| Keyword |
recursion length
second harmonic wave
incident and reflected waves
shoaling
sloping bathymetry
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| Abstract |
In order to apply two-point method (Goda, 1976) on slope, the study in this thesis sets up 14 wave gages on sloping bathymetry in a wave flume, and further uses two-point method (Goda, 1976) to separate incident and reflected waves on time domain traveling on sloping bed.
First of all, the experiment applies two neighbor wave gages with depth difference less than 1 cm to separate the incident and reflected waves by the two-point method (Goda, 1976) to get the incident and reflected waves. The result is almost as the same as reflected wave of horizontal bottom. Furthermore, considering the linear wave shoaling theory, this research applies the method on other wave gages with larger depth difference to get series reflection coefficients. The experimental study on the spatial L/2 divergent position also gets a good verification. This experimental investigation not only can obtains the reflection coefficient on slope but also can discuss the error of reflectance calculation following with widening variance of depth between two wave gages, and moreover to compare with former reflection coefficient calculated by numerical model.
Besides, the study from discussing second harmonic waves on slope indicates that twice frequency of reflection has the phenomenon of recursion length in spatial; it shows that two-point method could account for high harmonic wave generated from non-linear phenomena. |
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| Advisory Committee |
Yang-Yih Chen - chair
I-fan Tseng - co-chair
Fang-Cheng Li - co-chair
Yung-Fang Chiu - co-chair
Chung-Pan Lee - advisor
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| Files |
Indicate in-campus at 1 year and off-campus access at 1 year. |
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| Date of Submission |
2014-09-23 |
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