1. What is the Surf Similarity Parameter?

The Deepwater Surf Similarity Parameter (ε₀') is a dimensionless parameter used to model several effects of (breaking) surface gravity waves on beaches and coastal structures. It relates wave runup to deepwater wave height.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( \varepsilon_0' \) — Deepwater Surf Similarity Parameter (dimensionless)
• \( R \) — Wave Runup (meters)
• \( H_d \) — Deepwater Wave Height (meters)

Explanation: The parameter provides insight into wave behavior and breaking characteristics in coastal environments.

3. Importance of Surf Similarity Parameter

Details: This parameter is crucial for coastal engineering, helping predict wave runup, overtopping, and shoreline erosion patterns. It's essential for designing coastal protection structures.

4. Using the Calculator

Tips: Enter wave runup and deepwater wave height in meters. Both values must be positive numbers greater than zero.

5. Frequently Asked Questions (FAQ)

Q1: What is considered a typical range for surf similarity parameter?
A: Values typically range from 0.5 to 10, with lower values indicating more dissipative conditions and higher values indicating more reflective conditions.

Q2: How does this parameter relate to wave breaking?
A: The surf similarity parameter helps classify breaker types: spilling (ε₀' < 0.5), plunging (0.5 < ε₀' < 3.3), and surging (ε₀' > 3.3).

Q3: What factors can affect wave runup measurements?
A: Beach slope, bottom roughness, wave period, and wave height all influence wave runup measurements.

Q4: Are there limitations to this parameter?
A: The parameter works best for regular waves and may need adjustment for irregular wave conditions or complex bathymetry.

Q5: How is deepwater wave height determined?
A: Deepwater wave height is typically measured or calculated from wave data obtained in water depths where waves are not affected by the bottom.