Provides hydrologic conditions reports for California, including snowpack, precipitation, and reservoirs. Read about how forecasts are made.

Peruse a lecture on how geysers. Learn about the six types of geyser reservoir systems and the unique eruptions they produce.

Explains not only what groundwater is, but why it's so important. Find out how it gets contaminated.

Directory of resources with a 3,800 member groundwater discussion group. Find consultants, equipment, software, jobs, events and publications.

Find out how water gets distributed in nature, and learn about evaporation, condensation, precipitation, and transpiration.

Read the reference entry which presents two definitions of the term as it is used in physics and chemistry.

Learn about how water slowly turns to vapor even in the absence of heat.

Defines the study of freshwater systems including associated animal life, pollution, and physical features.

Describes the origins of hot and cold springs, and outlines the principal varieties of these natural water sources.

Description and diagrams explain what osmosis is and how it works. Check the bibliography for other resources.

Object Watershed Link Simulation, a 3D, vector-based, physically-based, distributed hydrologic model for watershed scale. Requires Win 3.x or 95.

Guide to the slurry-wall industry. Peruse technical articles and an event calendar, and find engineers and industry experts.

Operated by the US Geological Survey, this site contains maps, photos, reports and news for Lake Tahoe.