Possibly the soil subsidence can be stopped or at least reduced.

In urban areas, there is no true solution for soil subsidence; it is not feasible to “reinflate” soils with water while urban life continues above.

It is beneficial, however, to restore a certain level of water content to the soil in the interest of slowing future sinkage. The key is to absorb or retain as much stormwater runoff as possible through porous surfaces, retention ponds, bioswales, rain gardens and widened and landscaped grade-level outfall canals.

https://openrivers.lib.umn.edu/article/new-orleans-was-once-...