Large dams for energy generation and irrigation and its problems. An introduction: Large dams play an increasingly important role worldwide for the »renewable« energy supply and in the many arid regions of the world for irrigation and the expansion of agriculture. Some of the newer dams are spectacular giant projects.
Large dam projects are now very controversial, they are sources of conflict; they change land use diametrically, they drive out the indigenous population and destroy their livelihoods. The ecological and economic effects are not only positive, they also have negative consequences to a considerable extent. In addition, the dam and the use of the water reservoir are only possible for a limited time.