Chapter 1
Introduction 1
1.1 What Is Hydrogeology? 1
Physical Hydrogeology Before the Early 1940s 2
Chemical Hydrogeology Before the Early 1960s 3
Post-1960 Hydrogeology 4
1.2 The Relationship Between Hydrogeology and
Other Fields of Geology 4
1.3 Hydrologic Cycle 5
Components of the Hydrologic Cycle 5
Evapotranspiration and Potential
Evapotranspiration 7
Infiltration and Recharge 8
Base Flow 8
Hydrologic Equation 10