News Â· 10:18 p.m. Â· July 29, 2012. Celebrity Net Worth recently compiled a list of the 20 richest living rappers. At first we were sure that reading their list was going to make us feel very, very bad about the current state of our checking accounts, but no worries â each of these rappers is so wealthy that it's impossible to put into perspective.
Definition of aquifer for English Language Learners. : a layer of rock or sand that can absorb and hold water.
In the unconfined aquifers, the water table is located at the outermost part of the aquifer. The water in the confined aquifer is usually the water that receives runoff, snowmelt etc. To keep it simple, unconfined aquifers have no confining layers. The confined aquifer has confining layers between the water level and the ground level. The water in this type of aquifer runs between two beds of impermeable layers. The final type of aquifer is known as the perched aquifer. Perched aquifers are aquifers that have no confining layer below the ground level and sit above the main water table., Figure 1 Schematic of confined and unconfined aquifers.