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Earth's water

Earth's Water Topics

• Earth's water
  • Where is Earth's water located?
  • How much water is there on (and in) the Earth?
  • Sea level and climate
• The Water Cycle
  • Our water-cycle diagram and summary - in many languages
  • Follow this drip through the water cycle
  • The water cycle for kids
  • See how a 2nd grade Australian class views the water cycle
• Measuring water
  • How USGS monitors water
  • How is flow in a stream measured?
  • How does stream height relate to flow?
  • High water marks
• The water around us
  • Watersheds
  • Impervious surfaces and flooding
  • Rain
    • Why raindrops are different sizes
    • Are raindrops tear-shaped?
  • Surface-water menu
    • Surface water use
    • Rivers and streams
    • Runoff
    • Rivers and the landscape
    • Monthly and yearly streamflow patterns
      • Sediment in rivers
      • Comparing river lengths
    • Lakes and reservoirs
    • Q&A about floods
    • Q&A about droughts
  • Ground-water menu
    • What is groundwater
    • Ground-water use
    • Importance of groundwater
    • Trends in ground-water use
    • Ground-water quality
    • Pesticides in groundwater
    • What is an aquifer?
    • Water wells
    • What is an artesian well?
    • Sinkholes
    • Land subsidence
    • Water dowsing
    • How hydrologists find groundwater
  • Glaciers and icecaps
  • EPA's Surf Your Watershed