Hydrology
Hydrology is a branch of geography that studies the properties of water on Earth, especially its movement in relation to land.
Water on Earth
Earth holds trillions of tons of water, mostly in oceans. Only 2.5% is freshwater, primarily found in glaciers, groundwater, lakes, and rivers.
Which States Have the Highest Percentage of Water Area?
Water shapes U.S. states' geography and ecosystems. Which states have the highest and lowest percentages of area covered by perennial water?
When Rivers Become Ice Roads
During the cold winter months, parts of Canada's Mackenzie River become a ice road that trucks up to 22,000 pounds can navigate.
How Sea Level Rise Will Affect Salt Marshes
Researchers have calculated that about 90 percent of salt marshes are under threat from rising sea levels predicted to occur by the year 2100.
Surge Flows: A Rare River Phenomenon
Surge flows are a rare phenomenon where shallow waters, sand or sediment, and steep topography combine to create waves in rivers.