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Hydrology is the science of water occurrence, movement and transport. Hydrogeology is the part of hydrology that deals with the occurrence, movement and quality of water beneath the Earth's surface. Because hydrogeology deals with water in a complex subsurface environment, it is a complex science. On the other hand, much of its basic terminology and principles can be understood readily by non-hydrogeologists.

This section presents basic terms and principles of hydrogeology. The first section introduces many key terms and concepts in definition form. Subsequent definitions include graphics to aid in explanation. The following sections introduce principles of a ground water movement, using these terms. Graphics are included to further define terms and illustrate concepts.

Hydrogeology Menu:

Key Terms and Concepts
What is Ground Water?
What is a Ground Water Aquifer?
Water Movement in the Aquifer
Ground Water and Wells
How are Aquifers Replenished?
Where does Water from Aquifers go?
Too Much Water Going Out


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