A joint venture to develop up to 100,000 MW of solar power in Middle Eastern and North African deserts by 2050 was formed on Oct. 30 in Munich. The group DII GmbH is owned by 12 major firms, most of them based in Germany, including Siemens A.G., Deutsche Bank A.G. and the DESERTEC Foundation. DII ultimately aims to supply as much as 15% of Europe’s electricity demand and a substantial part of local needs.
Arch dams, classically curved monoliths situated in narrow valleys, are not as common as other types of dams, such as embankment dams and gravity dams. ENR takes a look at some of the biggest arch dams in the world, both completed and under construction.