Performance Assessment of West Main Canal of Dez in the Different Water Operational Scenarios Using CANALMAN Model

The main objective of this paper is to apply the CANALMAN model in the performance assessing of different water operational scenarios in the west main canal of Dez irrigation network. The proposed model was calibrated and validated based on the real data of March and April 2006. The real water operational condition during five months (May to September 2006) was simulated. For this period, the mean value of delivery efficiency, adequacy, equity, and reliability performance indicators was estimated 0.669, 0.881, 0.271, and 0.238, respectively. Hence, the delivery adequacy and equity had a moderate status and efficiency and reliability of delivery had a weak status. The results indicated that the night-time closure scenarios may be improved the water distribution status in the canal. During of a 15 days simulation, water saving for night closure scenario 1 and 2 was estimated 11.23% (0.92 MCM) and 8.31% (0.68 MCM), respectively, of water delivered to the canal which can be controlled and saved throughout the reaches of the canal. The findings demonstrated the the west main canal of Dez has good potential to make savings, which can be realized at system level through reduced demand on supplemental from the dam.