ScienceQuiet 70d · day 75
Study warns sand overextraction from riverbeds threatens water systems globally
Research shows concrete demand has doubled since 2000, with 80% extraction in Asia causing riverbank weakening and groundwater depletion.
What to know
- Sand and gravel extraction from riverbeds has doubled since 2000, outpacing natural replenishment.
- Asia accounts for 80% of current global demand, driven by concrete production.
- Overextraction is weakening riverbanks, depleting groundwater, causing coastal salt intrusion, and degrading water quality.
“The demand for sand and gravel has more than doubled in the last two decades, with overextraction leading to weaker riverbanks, lower groundwater levels, coastal salt intrusion and poorer water quality.”
Reviews of Geophysics study · Guardian Science
Kate Ravilious Guardian science reporter
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