Zayanderud Dam

{{Short description|Arch dam near Chadegan, Iran}}

{{Infobox dam

| name = Zayanderud Dam

| name_official =

| image = Chadegan Dam 4.jpg

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| coordinates = {{coord|32|44|02|N|50|44|13|E|type:landmark|display=inline,title}}

| country = Iran

| location = Chadegan, Iran

| purpose = Water supply, Power, Irrigation

| status = O

| construction_began = 1967

| opening = 1971

| demolished =

| cost =

| owner = Water Regional Company of Esfahan

| dam_type = Arch dam

| dam_height ={{Convert|88|m|ft|abbr=on}}

| dam_height_thalweg =

| dam_height_foundation= {{Convert|100|m|ft|abbr=on}}

| dam_length = {{Convert|450|m|ft|abbr=on}}

| dam_width_crest = {{Convert|6.50|m|ft|abbr=on}}

| dam_width_base = {{Convert|28.72|m|ft|abbr=on}}

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| dam_crosses = Zayandeh River

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| res_name =

| res_capacity_total = {{Convert|1450000000|m3|acre.ft|abbr=on}}

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| plant_capacity = 55 MW

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| website = https://www.esrw.ir/st/130

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}}

Zayanderud Dam, also spelled Zayandeh Rud Dam formerly known as the Shah Abbas Dam, is an arch dam on the Zayandeh River about {{Convert|10|km|mi|abbr=on}} east of Chadegan, Iran. The Zayanderud Dam is the main water reservoir with 1450 MCM capacity and has been exploited since 1971. The Zayanderud has provided the needs of water for important economic activities including agricultural, industrial and domestic consumptions. The primary purpose of the dam is water supply to Isfahan which lies {{Convert|88|km|mi|abbr=on}} to the east. It also supports a power station with an installed capacity of 55 MW.{{cite book |editor1= Jeroen C. J. H. Aerts |title=Climate change in contrasting river basins : adaptation strategies for water, food and environment|year=2004|publisher=CABI publ. |location=Wallingford |isbn=0851998356|page=117 |url=https://books.google.com/books?id=qRWhEMXZfUsC&dq=Zayandeh+Rud+dam&pg=PA117 |editor2=Peter Droogers |access-date=28 January 2014}}{{cite web|title=Dam and tunnel projects in operation|url=http://www.esrw.ir/company-achievements/projects-operation.dot?com.dotmarketing.htmlpage.language=2#9|publisher=Esfahan Regional Water Company|access-date=28 January 2014|language=fa|archive-date=19 February 2014|archive-url=https://web.archive.org/web/20140219082502/http://www.esrw.ir/company-achievements/projects-operation.dot?com.dotmarketing.htmlpage.language=2#9|url-status=dead}}

In recent years, the Zayandeh River has experienced significant reductions in flow due to a combination of drought, climate change, and overuse of water resources.