ia" title="Russia">Russia</a> and its former capital. They are usually caused by the overflow of the delta of <a href="//en.wikipedia.org/wiki/Neva_River" title="Neva River">Neva River</a> and surging water in the eastern part of <a href="//en.wikipedia.org/wiki/Neva_Bay" title="Neva Bay">Neva Bay</a> but sometimes caused by melting snow. Floods are registered when the water rises above 160&#160;cm with respect to a gauge at the <a href="//en.wikipedia.org/wiki/Saint_Petersburg_Mining_Institute" title="Sain