A federal study by NASA reveals that parts of Marin County, specifically eastern San Rafael and Corte Madera, are sinking at a rate of over 0.4 inches per year. This land subsidence is primarily due to sediment compaction in landfilled areas. Predictions indicate that sea levels in the lowest areas could rise by more than 17 inches by 2050, surpassing the regional average. Other bayside communities also face similar threats, and the study aims to enhance understanding for better adaptation strategies against rising seas.
In many parts of the world, like the reclaimed ground beneath San Francisco, the land is moving down faster than the sea itself is going up, said Marin Govorcin.
The subsidence is happening in landfilled areas made from sand and mud dredged from the sea. Landslides and erosion could also lead to subsidence.
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