National data on water consumption in irrigation are available from a Survey conducted by the Instituto Nacional de Estadistica. These are methodologically not comparable with the data on water abstractions reproduced in Figures 4.1 and 4.2. However, in flood irrigation use of land-levelling techniques are increasingly being used. They therefore conducted a survey of water experts to generate a consensus view. Their survey includes information on the evolution of water reserves and water demand in recent years, as well as projections of water supply and demand. The results indicated that the river basins subject to most stress are Cuencas del Sur, Segura, Baleares, followed by Ebro, Jucar, Cataluna, Guadalquivir and Tajo.