SAND MINING IS DESTROYING ASIA'S RIVERS
Sand mining is the extraction of sand, mainly through an open pit but sometimes mined from beaches and inland dunes or dredged from ocean and river beds. Sand is often used in manufacturing, for example as an abrasive or in concrete.
https://en.wikipedia.org/wiki/Sand_mining
JANUARY 14, 2019 / 7:45 AM
From Tibet to the 'Nine Dragons', Vietnam's Mekong Delta is losing sand
Mai Nguyen, James Pearson
https://www.reuters.com/article/us-vietnam-mekong/from-tibet-to-the-nine-dragons-vietnams-mekong-delta-is-losing-sand-idUSKCN1P8018