Irrigation Water Optimal Management with Emphasis on Water Economic Productivity: Case Study: Irrigation and drainage networks of Marun

The need to store water and increase the economic productivity of consuming water is very important in water resources management. The aim of this study was to optimally allocate irrigation water by determining the optimal cropping patterns of agricultural products under different inflow scenarios during the growing seasons under uncertainty using a multi-stage stochastic programming model with interval parameters and comparing the economic productivity of water consumption in these conditions with the current conditions. For this purpose, hydrometric data were obtained from Maron Network Station during 2006-2016. An optimization model has been developed for water allocation and distribution between different growing seasons. The results showed that the average economic productivity index in the networks for both lower and upper bounds of the optimization model is 19 and 16 percent respectively higher than the current level in the current management, while water consumption management in the lower and upper bounds of the optimization model is better than the current management due to 34% and 3 % reduction in water consumption.