As ships get bigger and faster, their wakes are putting increasing stresses on moorings of nearby vessels, causing some to break free—with potentially disastrous consequences. Now, an international group of organizations has gathered in the Netherlands to develop software to calculate and mitigate wash effects of passing ships to improve port design and operations.With the three-year Research on the Passing Effects of Ships (ROPES) project now two-thirds finished, engineers in Rotterdam plan to validate it with a final set of full-scale ship trials later this month. The Port of Rotterdam is one of 26 organizations— including design firms, other port
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.