Why are the world’s cities sinking?
Science Weekly
Managing Land Subsidence in Tokyo
Tokyo, with a population of about 30 million, had a delta where approximately a million people lived. Groundwater pumping in the 1920s led to subsidence of the delta, sinking up to five meters by 1970. To counteract this, Tokyo brought in surface water from reservoirs, banned groundwater pumping, and implemented dikes and pumps to manage the subsidence, leading to the stabilization of the land's sinking.
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