Zayandeh Rud Dam Reservoir درياچه سد زاينده رود

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Zayandeh Rud (Persian: زاینده رود, from زاینده, /zʌyandɛ/ “life giver” and رود, /rʊd/ “river”) (aka Zandehrood) is the largest river on the central plateau of Iran, Isfahan Province.

The Zayandeh starts in the Zagros Mountains and flows 400 kilometres (200 mi) eastward before ending in the Gavkhouni swamp, a seasonal salt lake, southeast of Esfahan city. The Zayandeh has significant flow all year long, unlike many of Iran's rivers which are seasonal. The Zayandeh is spanned by many historical Safavid era bridges, and flows through many parks.
The Chadegan Reservoir dam project in 1972 was a major hydroelectric project to help with stabilizing water flow and generate electricity. The dam was initially named Shah Abbas Dam after Shah Abbas I, the most influential king of the Safavid dynasty, but it was changed to Zayandeh Dam after the Islamic revolution in 1979. Since 1972, the Chadegan Reservoir has helped prevent seasonal flooding of the Zayandeh River.