Rivers of Isfahan Province

300px|thumb|Map of the Zayandeh river and the Zayandeh/Gavkhouni drainage basin thumb|right|The Origin of Zayanderud, Koohrang tunnel extracts water from inside the Zagros Mountains. 300px|thumb|Zayanderud, summer 2015 thumb|Zayanderuz, summer 2018 thumb|Zayanderud, 2018 The Zayanderud or Zayandehrud (; from "fertile" or "life-giver", and "river"), also spelled as Zayanderud or Zayanderood, ..., is the largest river of the Iranian Plateau in central Iran.