Satellite data shows the ground is sinking beneath many of the world’s biggest river delta cities, worsening flood and sea-level rise risks.

River deltas and Lake Ayakum in Tibet are featured in this image photographed by an Expedition 27 crew member on the International Space Station. The Tibetan Plateau contains numerous lakes that dot ...

The figure shows the delta of the river Lena, one of the largest rivers in the world. The river is visible in bright yellow, as it splits and divides into many different channels before meandering ...