Chao Hu is one of the five largest freshwater lakes in China. Heavy use of the lake in recent years has led to eutrophication and silting. Due to China’s rapid economic growth, the lake is now one of China’s most polluted lakes.
Picture by Jianan Yu / REUTERS
Yukon river delta, Alaska.
Photograph by Jay Dickman
To solve the fire protection regulations in the open-plan structure of the Mercedes-Benz Museum, a unique smoke elimination system was developed: an artificially generated tornado.
In the event of a fire, outlets located along the core walls inject air into the interior courtyard of the Museum generating an artificial tornado which collects the smoke and then discharges into the outside air.
Pictures of a stream of sandy water runoff, straight out of a snowfield at 2500 m by Sylvain Meyer. The melting snow mixes with the sand warmed up by the sun.
ARTWORK OF THE WEEK
The Journey of a Drop (2012)
Drops of coloured ink fall from the top of a staircase into a glass tank six storeys below in this installation at the V&A museum during this year’s London Design Festival. The seemingly simple notion of a drop falling has been masterfully designed using finely-tuned machinery and specially developed liquids and pigments.
The installation was inspired by the traditional method of making lead shot for ammunition, which involves dropping molten lead from a specific height so that it solidifies into a sphere when plunged into water.
When a solid object falls in a pool, a sheet of liquid, the crown splash, is sent upward. Simultaneously, the object pulls a cavity of air down with it. As the water moves inward, this cavity is pinched. As the diameter of that pinched cavity shrinks, the velocity of the upward escaping air increases, resulting in the formation of an air jet moving faster than the speed of sound. Next time you throw a stone into a pond, enjoy the knowledge that you’ve broken the sound barrier.
From: D. van der Meer