USGS Water Science for Schools explaines the uses of ground water in the United States. The main uses of ground water include "irrigation uses, drinking-water and other public uses, and for supplying domestic water to...

U.S. Geological Survey Water Science for Schools provides information about types of wells, drilling and water levels. Links to many other water-related sites.

This site is from the USGS. The natural processes of ground-water and surface-water interactions are completely evaluated and diagrammed for easy understanding that includes the interaction of ground water with lakes,...

HydroSHEDS (Hydrological data and maps based on SHuttle Elevation Derivatives at multiple Scales) is a mapping product that provides hydrographic information for regional and global-scale applications in a consistent...

The USGS Water Science for School's shows how water is used to grow crops for food and links with many techniques used by farmers to use irrigation water more wisely.