Water Resources - Science - USGS

The U.S. Geological Survey provides science information about natural hazards that threaten lives and livelihoods. In this case, all about water. Topics include:
   Types of Water
   How We Use Water
   Measuring and Monitoring Water
   Aquatic Biology and Ecosystems
   Common Water Issues
   Essential Tools and Products
   Advanced Capabilities and Research
   Science Topics
   Education