When groundwater is pumped for irrigation,the water percolates through the surface and back into the water table,effectively refilling the reservoir,therefore no net subsidence occurs.

Question

Quizplus · Accepted Answer

While it is true that groundwater pumped for irrigation can eventually percolate back into the water table, it often takes years or even decades for this process to occur. In the meantime, the removal of large quantities of groundwater can lead to subsidence (i.e. sinking) of the land surface, which can cause a variety of problems including damage to infrastructure, increased flood risk, and reduced aquifer capacity. Therefore, pumping groundwater for irrigation can have significant long-term impacts on the groundwater system and the surrounding environment.

When Groundwater Is Pumped for Irrigation,the Water Percolates Through the Surface