In a growing number of global cities, the ground beneath our feet is literally sinking. From Jakarta to the Chinese mainland's capital, Beijing, to the canals of Venice, urban centers are subsiding at varying rates.
Experts point to a mix of factors driving this stealthy shift:
- Sea-level rise: Higher ocean levels can push groundwater and sediments downward.
- Groundwater depletion: Pumping aquifers for drinking water and agriculture removes support underground.
- Urban infrastructure: The sheer weight of buildings, roads and development can compress soft soils.
The phenomenon is not confined to coastal megacities. Major U.S. hubs are also experiencing measurable subsidence, raising red flags for bridges, roads and utilities.
Tracking these shifts used to be a challenge, but advances in satellite radar and ground sensing are now giving researchers a clearer picture of where and how fast land is sinking. Armed with better data, city planners can prioritize upgrades and resilience measures to protect vital infrastructure.
As sea levels continue to climb and urban demands on water grow, keeping an eye on sinking land is critical for building cities that can stand the test of time.
Reference(s):
cgtn.com
