Legend of the tidal wave graphs.
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In the tide graphs of the insert E, the vertical bars represent the water level, as forecasted without considering the weather conditions; the profile behind the bars shows the water levels as recorded.
The divisions of the days and hours conform to the universal time (GMT).
High and low pressure.
The meteo pressure affects the water levels: a high pressure compresses them, while a low pressure makes them increase.
In case of high pressure.
In case of low pressure.
The wind.
Also the local wind could affect the tides.
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