Quick Answer
Calculate Coastal Outfall Design Wave Height Calculator (USACE SPM-based)
Calculator
Result Interpretation
Coastal Outfall Design Wave Height Calculator (USACE SPM-based) Calculator computes Design significant wave height at outfall in m using the defined engineering formula and the input values provided.
Worked Example
Verified calculation
Given:
- Effective wind fetch = 15000
- Deep-water significant wave height = 2.8
- Refraction coefficient = 0.92
- Shoreline exposure coefficient = 0.85
- Deep-water wavelength = 120
Expected Result:
- Design significant wave height at outfall = 0.66067380599206
Engineering Interpretation:
Under the given input conditions, the calculated result is: Design significant wave height at outfall = 0.66067380599206 m.
The actual numerical result is computed by the Runtime engine using the persisted tool definition. The values shown here come from automatically validated test cases.
Formula / Method
design significant wave height at outfall = deep-water significant wave height * pow(tanh(2.5 * deep-water significant wave height / deep-water wavelength), 0.5) * (1.0 + 0.25 * tanh(0.03 * effective wind fetch / deep-water significant wave height)) * shoreline exposure coefficient * refraction coefficientFormula family: formula_coastal_coastal_outfall_design_wave_height_calculator
Variables
| Symbol | Label | Role | Description |
|---|---|---|---|
| H_0 | Deep-water significant wave height | INPUT | Deep-water significant wave height |
| L_0 | Deep-water wavelength | INPUT | Deep-water wavelength |
| F | Effective wind fetch | INPUT | Effective wind fetch |
| K_s | Shoreline exposure coefficient | INPUT | Shoreline exposure coefficient |
| K_r | Refraction coefficient | INPUT | Refraction coefficient |
| Design significant wave height at outfall | Design significant wave height at outfall | OUTPUT | Design significant wave height at outfall |
| pi | pi | CONSTANT | pi = 3.1415926535898 dimensionless |
Calculation Steps
- Enter the deep-water significant wave height in m.
- Enter the deep-water wavelength in m.
- Enter the effective wind fetch in m.
- Enter the shoreline exposure coefficient in dimensionless.
- Enter the refraction coefficient in dimensionless.
- Step 1: Compute design significant wave height at outfall.
- Read the design significant wave height at outfall (m) from the results.
Engineering Summary
Calculate Coastal Outfall Design Wave Height Calculator (USACE SPM-based)
Frequently Asked Questions
What does this calculator calculate?
The Coastal Outfall Design Wave Height Calculator (USACE SPM-based) Calculator estimates Design significant wave height at outfall based on the input parameters you provide
Why is deep-water significant wave height important in this calculation?
deep-water significant wave height is directly proportional to design significant wave height at outfall. When you enter deep-water significant wave height in m, the calculator uses it in the engineering formula to compute the output
How should I interpret the result design significant wave height at outfall?
The calculator outputs design significant wave height at outfall in m. The result is computed directly from the input values using the defined engineering formula
What units should I use for the inputs?
Enter each value in the units shown next to the input field: Deep-water significant wave height (m), Deep-water wavelength (m), Effective wind fetch (m), Shoreline exposure coefficient (dimensionless), Refraction coefficient (dimensionless). Make sure all inputs use the specified units for consistent results
What assumptions does this calculator use?
This calculator uses automatically validated engineering formulas. Results are approximate and should be validated against site-specific conditions, applicable codes, and professional engineering judgment
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