ABSTRACT

Groundwater is a hydrologic subsystem that goes largely unobserved. Most of this chapter is devoted to understand the physical characteristics of groundwater storage and flow, with simulation modeling of groundwater flow. when analyzing the migration of pollutants in groundwater two cases are considered: Multiphase flow and Flow systems. This chapter begins by examining the basic properties and characteristics of aquifers. This chapter is only an introduction to an extensive subfield in hydrology. The chapter examines the pressure condition of unconfined and confined aquifers. The two primary properties of aquifer materials are porosity and permeability. Hydraulic conductivity is a function of both the aquifer material and the water. A very common problem is that of determining the quantity of water flowing through an aquifer. Groundwater quantity and quality have become some of the most important topics in hydrology today. This chapter ends with a brief look at major groundwater regions in the United States.