These amazing pictures capture a process called 'sand-washing' at the Xiaolangdi Reservoir in China's Yellow RIver. Water is discharged from the reservoir at 2,600 cubic metres per second to clear up the sediment in the river. Each year, the river rises as 1.6 million tonnes of silt deposit builds up, Sky News reports.
Sand-washing at giant China dam
Millions of tonnes of water and sand are gushed through a section of the Xiaolangdi Reservoir in China as part of an annual sand-washing operation. .
Pictures of the week (July 2 to July 9) 090712
Local residents watch as sediment-laden flood water gushes through the Xiaolangdi Dam on the Yellow River in Luoyang, Henan province July 6, 2012. Picture taken July 6, 2012. REUTERS/Carlf Zhang