Precipitation occurs in excessive quantities for a very short period of time, causing fast flowing floods that result in massive human and material losses. Land cracks and rifts are caused by natural or human-induced factors, and the natural factors that help to cause faults and cracks include earthquakes, volcanoes and the quality of subsurface soil. It is known that chemical weathering contributes to the dissolution of calcareous rocks, forming subsurface voids and ground caves. These voids widen over time due to natural weathering, with the causes including excessive withdrawal of groundwater or the saturation of the upper layers due to rainfall and water leaking from farms, which leads to increased loads and subsidence.