Recently, another idea has been discussed. Just as withdrawing groundwater can cause subsidence, injecting water can reverse it. It’s not entirely a two-way street—much of the pore space lost during compaction can’t be recovered—but increased pore pressure can begin to unpack the sediment. Injection was used successfully in Long Beach, California in the late 1950s to halt subsidence caused by oil and gas extraction as well as groundwater usage.
La solución no es evacuar agua, sino introducirla. Curioso, to say the least.