As a response to devastating floods of the Mississippi river in the early 1900s, the US Army Corps of Engineers built a large-scale hydraulic model of the entire river system. The model, 2.5 times the size of Disneyland, allowed them to design better flood control infrastructures and to eventually save millions of dollars. In 1973, the physical model ceased to be used and was replaced by computer models. Nevertheless, mathematical equations still cannot capture all the complexity of river […]
1949 – Moniac: A Hydromechanical Machine to Teach Economics
The MONIAC or Phillips machine is a hydromechanical analog computer built to teach basic economical principles using colored water flowing in transparent pipes. The machine was built in 1951 after electrical-engineer-turned-economist William Phillips and his economist colleague Walter Newlyn realized that flows were used as a metaphor to teach economics, but have never been made physical. Phillips is also known for his eponymous curves. Several MONIACs were built, and a working one is […]
1957 – US Army Corps of Engineers San Francisco Bay Model
A working hydrodynamic model of San Francisco Bay and the surrounding waterways, with tides. It is still open to the public as a demonstration, although it is no longer used for research. Also see our related entry 1949 – Mississippi River Basin Model. Source: Wikipedia U.S. Army Corps of Engineers Bay Model.