What are these underground cavities that can open without warning? Civil Engineering Associate Professor Manoj Chopra explains the mechanisms behind this natural phenomenon.
Cracks in walls and foundations, doors and windows not closing properly, depressions in surrounding soil, accumulating water and creaking noises can all signal that something is happening below the surface.
splintering limestone substrate.
Natural and Man-made Causes
Changes to the subsurface water profile — including excessive rainfall, prolonged drought and groundwater pumping, changing water drainage patterns and heavy machinery operation — may accelerate sinkhole formation.