Aryobarzan Regulation Dam Project

Project Purpose / Layout

The purpose of the dam is to regulate the flow released from the storage dam in order to operate the powerhouse and reuse the water regulated in the regulation dam reservoir for increasing the energy and supply the agricultural demands.

Geographic Location

The dam is being constructed 4.6-km downstream the Marun storage dam in Tang-e-Takab valley. The dam site is about 14 km to city of Behbahan and 220 km to city of Ahvaz in Khuzistan province. The dam site is accessible by Behbahan - storage dam asphalt road.

Project History

Harza Company carried out the reconnaissance studies on the project area 1946 through 1975. The phase I study was conducted by Water Engineering Services Company and Rome - Consult Company 1983 through 1986. The phase II study was conducted by Mahab Ghodss Consulting Engineering Company 1988 through 1991. The construction began in 2004.

Technical Specifications of Project


Dam type

Concrete gravity dam

Dam height above foundation (m)


Dam crest length (m)


Dam crest width (m)


Dam body volume (m3)

340 x 103

Total reservoir volume (m3)

7 x 106

Active reservoir volume (m3)

5.19 x 106

Mean annual inflow (m3/s)

70 from each unit


Type of spillway

Gate free spillway

Flood discharge capacity (m3/s)



Powerhouse type

Surface powerhouse

Number of units


Design head (m)


Installation capacity (MW)


Mean annual generation (GWH)


Diversion System

Type of diversion system


Number of diversion culvert


Length of diversion culvert (m)


Diameter of diversion culvert (m)


Discharge capacity of diversion system (m3/s)


Power Tunnel 

Length of power tunnel (m)


Diameter of power tunnel (m)


Water Conveyance Tunnel

Length of water supply tunnel (m)


Diameter of water supply tunnel (m)


Bottom Outlet

Discharge capacity of bottom outlet (m3/s)



Discharge capacity of irrigation intake (m3/s)


Discharge capacity of drinking water intake (m3/s)


Discharge capacity of power intake (m3/s)


Relocation Roads & Access Roads

Length of relocation roads (km)