Sió
Template:Infobox river The Sió or Sió-csatorna (Sió-Channel)<ref>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref> is a fully regulated river in midwest Hungary.<ref>SIÓ-CSATORNA www.siocsatorna.hu, accessed 7 May 2021</ref> It is the outlet, at the eastern end, of Lake Balaton,<ref>Template:Cite news</ref> flowing out of the lake in Siófok. The Template:Convert long Sió flows into the river Danube near the city of Szekszárd. The Sió flows through the Hungarian counties Somogy, Fejér and Tolna, its main tributaries are Kapos<ref>Template:Cite journal</ref> from the right and Sárvíz from the left. The drainage basin of the Sió (including Balaton) covers more than a third of the Transdanubia region. The Sió's basin size is Template:Convert and its average discharge at the mouth is Template:Cvt.Template:GeoSource