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Water delivery performance in the Doroodzan Irrigation Scheme, Iran

Abstract:

Delivery performance ratio was used to assess the water delivery performance in an irrigation district in the Doroodzan Irrigation System in Iran. The measurements were applied to three selected irrigation canals and their tertiary outlets during five consecutive irrigation cycles. The canals were located at the head, middle and tail end of the irrigation district. Performance indicators reveal that the physical system and the management could respond to the delivery of the intended supply. The indicators show a better reliability performance than the equity performance in water delivery at the tertiary outlets. The results from the Doroodzan Irrigation System reveal that the system could not deliver water according to the real crop water requirements. The actual overall efficiency was used to quantify the water delivery performance in terms of deficit and excess water. The equity and reliability performance was illustrated by using the spatial and temporal variation of the expected overall efficiency at the district level.