Tidal Period Accounting For Non-sinusoidal Character Of Prototype Flow By Keulegan Calculator

Formula Used:

\[ T = \frac{P \times \pi \times C}{Q_{max}} \]

Tidal Duration (T):

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1. What is Tidal Period Accounting for Non-sinusoidal Character of Prototype Flow by Keulegan?

This calculation method estimates tidal duration considering the non-sinusoidal characteristics of prototype flow using Keulegan's constant. It provides a more accurate assessment of tidal dynamics in estuaries and coastal areas with irregular flow patterns.

2. How Does the Calculator Work?

The calculator uses the formula:

\[ T = \frac{P \times \pi \times C}{Q_{max}} \]

Where:

\( T \) — Tidal Duration (seconds)
\( P \) — Tidal Prism Filling Bay (m³)
\( C \) — Keulegan Constant for Non-sinusoidal Character
\( Q_{max} \) — Maximum Instantaneous Ebb Tide Discharge (m³/s)
\( \pi \) — Mathematical constant pi (approximately 3.14159)

Explanation: The equation accounts for the non-sinusoidal character of tidal flow patterns, providing more accurate duration estimates for complex tidal systems.

3. Importance of Tidal Duration Calculation

Details: Accurate tidal duration estimation is crucial for coastal engineering, navigation planning, sediment transport studies, and environmental impact assessments in tidal estuaries and coastal regions.

4. Using the Calculator

Tips: Enter tidal prism volume in cubic meters, Keulegan constant, and maximum ebb tide discharge in cubic meters per second. All values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What is the typical range for Keulegan constant?
A: The Keulegan constant typically ranges from 0.8 to 1.2, depending on the specific tidal characteristics and flow patterns of the estuary.

Q2: How is tidal prism measured?
A: Tidal prism is typically measured through bathymetric surveys and tidal range measurements, representing the volume of water between high and low tide levels.

Q3: What factors affect maximum ebb tide discharge?
A: Channel geometry, tidal range, freshwater inflow, and bottom friction are key factors influencing maximum ebb tide discharge rates.

Q4: When is this calculation method most appropriate?
A: This method is particularly useful for estuaries and inlets with significant non-sinusoidal tidal characteristics and complex flow patterns.

Q5: How accurate is this calculation compared to field measurements?
A: While providing good estimates, field measurements using current meters and ADCPs will always provide the most accurate tidal duration data.