Groundwater Level Fluctuations
According to the DNR website, the top level of groundwater, referred to as the water table, can change in response to precipitation and water withdrawals. During times of drought, local water tables can drop due to decreased recharge and expanded water use (e.g. watering lawns, irrigating farm fields, municipal water supply). The outcome to that is that the water table can fall below surface water resources or from wells that withdraw water from the aquifer.
Conversely, the opposite can occur as well, resulting in a high water table (too much groundwater). Flooding occurs when frequent, on going rainfall leads to excessively fast recharge of local groundwater levels and the water table surpasses the land surface. This type of flood may be prominent near seepage lakes. This type of flood can be prolonged because water table reduction requires drainage. See below for the DNR's example of what each type of level would look like.
from the entire aquifer above the flood level.