Title page for etd-0823114-154533


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URN etd-0823114-154533
Author Hao-Chung Ku
Author's Email Address No Public.
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Department Marine Environment and Engineering
Year 2014
Semester 1
Degree Master
Type of Document
Language zh-TW.Big5 Chinese
Title Experimental study on the measurement of reflection coefficient by Goda method for sloping beach
Date of Defense 2014-09-12
Page Count 87
Keyword
  • recursion length
  • second harmonic wave
  • incident and reflected waves
  • shoaling
  • sloping bathymetry
  • 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.
    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
  • Files
  • etd-0823114-154533.pdf
  • Indicate in-campus at 1 year and off-campus access at 1 year.
    Date of Submission 2014-09-23

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