Changing the area would require the model to be able to allocate water demand for irrigation according to different crops and actual locations; this facility is currently not available. Even if the Enuironmental Outlook Baseline projection were to consider a modest expansion of irrigation,1 the associated growth in irrigation water demands would not alter the total demands decisively. These are increasingly determined by much faster growing demands for domestic and industrial use and electricity production. Other projections of total water demands show a comparable picture (Shen, 2008). However, despite being equipped, the area is often not irrigated for various reasons such as lack of water, absence of farmers, land degradation, damage and organisational problems.