ABB’s Symphony Plus control system to help protect Venice from high water flooding at the long Venetian Lagoon Malamocco inlet. Every four years or so, text messages, church bells and sirens alert the Venetians to what they call an "Aqua Alta" or the imminent arrival of an exceptionally high tide. These are high waters of more than 140 cm, which cover around 54 percent of the city. More frequent, but no less worrying, are high tides of around 110 cm, which occur up to four times a year…