Mekong River’s new aquamarine color may be sign of trouble

The Mekong River has recently acquired an aquamarine color that may beguile tourists but also indicates a problem caused by upstream dams, experts in Thailand say.

The river usually has a yellowish-brown shade due to the sediment it normally carries downstream. But lately it has been running clear, taking on a blue-green hue that is a reflection of the sky. The water levels have also become unusually low, exposing sandbanks that allow the curious to stand in the middle of the river.

Low water levels pose an obvious problem for fishermen and farmers, but experts say the decline in sediment exposes a different danger that can result in greater erosion of the river’s banks and bed.

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Busaba Sivasomboon | AP