Calculation of Channel Performance, Water Losses and Water Delivery Shortage in Irrigation Intakes for Different Water Delivery and Distribution Options

Abstract

Usually, the amount of water that is delivered to the downstream of a gate in irrigation network does not match with the actual need and in some cases it is significantly higher than the need and sometimes it is far less. This imbalance in delivery and distribution of water not only reduces the product performance and farmer’s satisfactions, but also for those farms that have received too much water may cause yield reduction due to excessive irrigation. In this study, using Rootcanal hydrodynamic model that is one of the irrigation channel hydraulic simulation models, several options for water delivery and distribution in E1R1canal of Dez irrigation network are simulated. Then using the simulation results, the performance index and volume of water losses are calculated. Also appropriate operation guidelines are determined and accomplished, then after implementation of them the canal performance and volume of losses are recalculated. The results show that in all scenarioes, increasing the number of operations, improves the performance indices of intakes and canal and among the various simulated options, the maximum performance improvement is 49% which belongs to the intake 6 in Scenario number2.
 

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