1. What is Form Number?

Form Number is the ratio of the sum of the amplitudes of the major constituents. It represents the relationship between diurnal and semi-diurnal tidal constituents in oceanography.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( O_1 \) — Principal Lunar Diurnal Constituent (m)
• \( K_1 \) — Lunar Solar Constituent (m)
• \( M_2 \) — Principal Lunar Semi-Diurnal Constituent (m)
• \( S_2 \) — Principal Solar Semi-Diurnal Constituent (m)

Explanation: The formula calculates the ratio between the sum of diurnal constituents (O1 + K1) and semi-diurnal constituents (M2 + S2), providing insight into the tidal form characteristics.

3. Importance of Form Number Calculation

Details: Form Number is crucial for classifying tidal patterns and understanding the relative importance of diurnal versus semi-diurnal tidal constituents in a specific location.

4. Using the Calculator

Tips: Enter all constituent amplitudes in meters. Values must be positive numbers, with M2 and S2 greater than zero to avoid division by zero.

5. Frequently Asked Questions (FAQ)

Q1: What do different Form Number values indicate?
A: Lower values indicate semi-diurnal dominance, while higher values indicate diurnal dominance in tidal patterns.

Q2: What are typical Form Number ranges?
A: Typically ranges from 0 to 3, with values below 0.25 indicating semi-diurnal tides and above 3 indicating diurnal tides.

Q3: How are tidal constituents measured?
A: Through harmonic analysis of tidal gauge data over extended periods to separate different constituent amplitudes.

Q4: Are there limitations to this calculation?
A: The calculation assumes linear superposition of tidal constituents and may not account for non-linear interactions in complex coastal environments.

Q5: How is Form Number used in practical applications?
A: It's used in tidal classification, coastal engineering, navigation planning, and environmental impact assessments.