Chapter 8: The Groundwater System

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Groundwater in the Hydrologic Cycle

Online resources for groundwater studies.

The USGS series of print publications, The Groundwater Atlas of the United States, describes the location, extent, and geologic and hydrologic characteristics of the nation's important aquifers.

A groundwater glossary from Michigan State University's Institute of Water Research.

Extensive links to groundwater resources on the Web, including environmental sites, health and safety sites, and groundwater sites.

Groundwater as a Resource

Environment Canada groundwater education page, with links to fact sheets, a groundwater quiz, and an interactive model of leachate migration from a landfill.

All Things Groundwater, the Illinois State Water Survey Groundwater Home Page. Includes links to dozens of groundwater resources.

Groundwater Hazards

Photograph of the famous Winter Park sinkhole near Orlando, Florida.

Photograph of a sinkhole that developed within a "gypstack" in Polk County, Florida.

Diagram: effects of groundwater mining.

An Overview of the Mississippi River's Saltwater Wedge is an interesting article about the effects of enlarging the Mississippi River's deep-draft channel on the duration and extent of annual saltwater intrusion.

Groundwater Pollution and Its Cleanup

The EPA Office of Water home page, with links to an Index of Watershed Indicators, EPA water programs, featured sites, and more.

National Water Research Institute home page. Canada's largest freshwater establishment conducts a comprehensive program of research and development in the aquatic sciences, in partnership with the Canadian and international science communities.

Munching microbes make a meal out of toxic substances.

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