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River sand mining is draining channels faster than nature can refill them, global review finds
Key Takeaways
- A global review of 411 studies says river sand and gravel extraction often surpasses natural replenishment by several times.
- Researchers link over-extraction to riverbed deepening, bank instability, groundwater decline, and saltwater intrusion.
- The paper urges governments to monitor mining locations, measure volumes removed, and set extraction limits based on sediment recovery.
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DT Editorial Team··via phys.org