## What determines tide height?

## What are the factors that affect the height of a tide?

- Wind speed
- Wind duration
- Fetch - distance of wind travel over open water
- Depth of water/roughness of sea bed
- Direction and speed of
**tide**

## How is height of tides calculated?

- An estimate of tide height at a time is possible using the
**"rule of twelfths".**In this method the tidal range is divided by twelve and it is assumed that the 1/12 of the range flows in the first hour, another 2/12 in the second hour, another 3/12 in the third hour, and so on.

## What is the definition of height of tide?

**height**of**tide**. [′hīt əv ′tīd] (oceanography) Vertical distance from the chart datum to the level of the water at any time; it is positive if the water level is higher than the chart datum.

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