Huge waves have been created on China’s Yellow River in an effort to flush out sand that’s built up in the river.
Vast amounts of water are allowed to gush from the Xiaolangdi Reservoir in China’s Henan province, rinsing the silt from the riverbed.
The process is done about once a year.
The build up of sand can slow the water flow and raise the level of the river, increasing the risk of flooding.
It’s reported that a whopping 30 million tonnes of sand can get moved – that’s about the weight of six million elephants!
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