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German Mines Cause 20km Subsidence, Shift School
23 Sep
Summary
- Groundwater extraction from opencast mines caused widespread subsidence.
- Subsidence extended up to 20km from the mine's edge.
- Re-activated geological faults intensified the impact.
Extensive groundwater extraction at an opencast coalmine in western Germany has caused widespread ground subsidence, impacting areas up to 20km from the mine's edge. Researchers found that this extraction lowered the water table, leading to significant ground movement.
The subsidence was not random but intensified along existing geological faults, re-awakening them and exacerbating the damage. Cracks in buildings and roads are evident, with one school shifting by half a metre.
Mining continues in the Rhenish coalfields, and subsidence is expected to persist for decades. However, satellite monitoring combined with geological data offers a method to map subsidence hazards, enabling communities to plan and build more resilient infrastructure.
