This simulation tool can be applied easily to irrigation demand problems for other crops in other scenarios. An effective water sustainability management requires global crop and farming region control. Although the tool produces reasonable simulation results, it can still be improved. The quantity of irrigation and harvest amount forecast by our simulations should not be considered as scientifically proven at this stage. More real data for sunflower harvest and irrigations need to be gathered for model calibration. Moreover, the modelling could consider more factors such as irrigation techniques and management.