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Water conveyance and distribution to Darband and Bilevar plains
General Specifications:
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The area under irrigation network is 30652 hectares
consisting of:
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6910 hectares of improvement in existing irrigation system.
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23742 hectares of development of newly irrigated land.
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Water allocated for irrigation:
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239.2 MCM from surface water annually
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45.7 MCM from groundwater annually
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33 MCM from return flow
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Water supply systems:
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Gavishan reservoir
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Gavishan conveyance tunnel
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Shirvaneh river
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Razavar diversion dam
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Irrigation methods:
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Surface irrigation
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Low pressure pipe irrigation
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Pressurized sprinkler irrigation
Project components:
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Razavar diversion dam
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Concrete free flow ogee spillway 64 m long
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Water intake capacity 1.5 cms on the right bank and 18 cms on
the left bank
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17 m long stilling basin
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Dam height from foundation 8.5 m
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Main
canals
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Discharge capacity 30 to 18 cms
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Length 87 km
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Darband irrigation network
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Primary and secondary canals 170600 m
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Main pipelines 45675 m
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Main drains 31400 m
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Primary and secondary drains 187600 m
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Flood control dykes 90110 m
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Bank stabilization and protection 33910 m
