Zala River References Zala River river, Hungary Ask Anything Homework Help Written by The Information Architects of Encyclopaedia Britannica The Information Architects maintain a master list of the topics included in the corpus of Encyclopædia Britannica, and create and manage the relationships between them. The Information Architects of Encyclopaedia Britannica Britannica AI Ask Anything Learn about this topic in these articles: Lake BalatonThe Zala River provides the largest inflow of water. Water outflow is through the sluice gates of Siófok, toward the eastern end of the lake, and the entire contents of the lake are replenished about every two years. Read MoreThe Zala River provides the largest inflow of water. Water outflow is through the sluice gates of Siófok, toward the eastern end of the lake, and the entire contents of the lake are replenished about every two years. Read More