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\title{High Tide Prediction}
\date{}

\maketitle

Unusually high tides, or sea surges, result from a combination of
chaotic climatic elements in conjunction with the more normal,
periodic, tidal systems associated with a particular area. The
prediction of such events has always been subject of intense
interest to mankind, not only from human point of view, but also
from an economic one. The most famous example of flooding in the
Venice Lagoon occurred in November 1966 when, driven by strong
winds, the Venice Lagoon rose by nearly 2 m above the normal water
level. The damage to the city's homes, churches and museums ran
into hundred of millions of Euros.

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Tide's behaviour is difficult to be predicted, because depends of
too much factors, like the astronomic and atmospheric agents. The
problem has been approached by numerical models and statistical
methods. Numerical models require the computation of the
meteorological forcing functions on each point of the finite
difference grid and, hence, they are computationally expensive.
Linear stochastic models are suitable for online forecasting since
they are simple and their computation burden is low.

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