1. What is Portion Caused By Filling?

Portion Caused By Filling (αf) represents the ratio of water volume entering the harbor per tide to the total harbor volume. It's a crucial parameter in harbor hydraulics and coastal engineering.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( P \) — Tidal Prism Filling Bay (m³)
• \( V \) — Total Harbor Volume (m³)

Explanation: The formula calculates the portion of harbor volume influenced by tidal filling, which is essential for understanding tidal exchange and water quality in harbors.

3. Importance of αf Calculation

Details: Accurate calculation of αf is crucial for harbor design, sediment transport studies, water exchange analysis, and environmental impact assessments of harbor projects.

4. Using the Calculator

Tips: Enter Tidal Prism Filling Bay and Total Harbor Volume in cubic meters. Both values must be positive numbers greater than zero.

5. Frequently Asked Questions (FAQ)

Q1: What is Tidal Prism Filling Bay?
A: Tidal Prism Filling Bay is the volume of water between mean high tide and mean low tide levels, representing the water volume that enters and leaves the harbor during a tidal cycle.

Q2: How is Total Harbor Volume measured?
A: Total Harbor Volume is typically calculated using bathymetric surveys and geometric modeling of the harbor basin below mean sea level.

Q3: What are typical values for αf?
A: αf values typically range from 0.1 to 0.5, with higher values indicating better tidal flushing and water exchange characteristics.

Q4: Why is αf important for harbor design?
A: αf helps engineers design harbors with adequate water exchange to maintain water quality, prevent stagnation, and manage sediment deposition.

Q5: Can this calculation be used for environmental assessments?
A: Yes, αf is a key parameter in environmental impact studies for evaluating how harbor modifications might affect tidal exchange and ecosystem health.