ABSTRACT
Groundwater is stored in and moves slow through stratigraphic formations located at varying depths with different hydrogeologic characteristics (i.e., permeabilities). These water-bearing formations are called aquifers and can be open to direct recharge from the surface (i.e., unconfined aquifers) and completely or partially isolated from surface recharge (i.e., confined or semiconfined aquifers). An aquifer may be composed of one or multiple layers of unconsolidated silt, sand and gravel, sandstone or
2.1 Groundwater Flow ..........................................................................................23 2.1.1 Basic Concepts of Groundwater Flow ................................................23 2.1.2 Aquifer Vulnerability ..........................................................................27
