Global Freshwater Storage Declining as Reservoirs Fill with Sediment
Freshwater reservoirs are accumulating sediment at a concerning rate, threatening water security for billions of people. According to a comprehensive analysis of more than half a million reservoirs globally, the world is losing over 7 per cent of its freshwater storage capacity to sediment build-up every decade.
This gradual accumulation of dirt and debris in reservoirs has been occurring since their construction, but the rate of loss is accelerating. If current trends continue, researchers estimate that approximately half of the world's reservoirs could become significantly compromised by sediment by the year 2060.
The implications are serious: reduced water storage affects drinking water supplies, agricultural irrigation, hydroelectric power generation, and flood control. Communities that depend on these reservoirs for basic water needs face increasing challenges as capacity diminishes.