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Equitable Water Distribution in Main Irrigation Canals with Constrained Water Supply

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Abstract

In this study a novel configuration of the Water Level Difference Error method is introduced to speed up the error sharing in the context of Model Predictive Control (MPC). The potential application of the controller is examined. The main objective of this controller is fair distribution of water between upstream and downstream users in main canals suffering from water shortages. The scheme uses the Integrator-Delay (ID) model for canal pool responses in a model predictive controller. The designed controller is tested on an accurate simulation model of a large canal system, using four test scenarios. The scenarios suffer from limited water supply conditions that are imposed by a limitation on the canal inflow. The results show fast reactions in equitable sharing of water level deviations from target throughout the canal. Since, all the pools are involved in optimally managing the water shortage, significant improvements in operational performance of the canal are achieved. In addition, the operational performance of the designed controller is remarkably improved by applying a new strategy of target-bands instead of target-levels in the canal pools as it increases the flexibility of the controller in making appropriate decisions.

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Acknowledgments

The authors would like to thank Deltares for providing the license of the hydrodynamic modeling package Sobek for use in this study. Financial support by the European Union by means of the FP7-ICT project DYMASOS (ref. 611281) is gratefully acknowledged.

One of the authors of this article, prof. P. J. van Overloop, passed away just before this work was finally accepted. The rest of the authors would like to express their gratitude and admiration to him and also expect that this article serves as a tribute to his memory.

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Correspondence to S. M. Hashemy Shahdany.

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Hashemy Shahdany, S.M., Maestre, J.M. & van Overloop, P.J. Equitable Water Distribution in Main Irrigation Canals with Constrained Water Supply. Water Resour Manage 29, 3315–3328 (2015). https://doi.org/10.1007/s11269-015-1000-4

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  • DOI: https://doi.org/10.1007/s11269-015-1000-4

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