Hydrology

Hydrology is a branch of geography that studies the properties of water on Earth, especially its movement in relation to land.

The Moderate Resolution Imaging Spectroradiometer (MODIS) on NASA’s Terra satellite captured this natural-color image of the Caspian Sea on June 4, 2010

What is a Closed Lake?

Caitlin Dempsey

Closed lakes are bodies of water that do not drain into an ocean or river.

A screenshot of an online map showing the location of dams in Europe.

Over One Million Barriers on European Rivers

Katarina Samurović

Over one million barriers disrupt Europe's rivers, impacting their flow, ecology, and economies.

Shaded relief map of the Florida and Central America area showing gulfs and seas.

Geography Definitions Related to Water

Caitlin Dempsey

Listed here are geography terms related to water bodies such as lakes, rivers, and oceans.

A simple map of the world showing average lake evaporation rate around the world with a shading scale from blue and green for low evaporation and orange and red for high rates of evaporation.

The Global Evaporation of Lakes

Mark Altaweel

Researchers used satellite imagery and modeling to calculate the evaporation volume across over 1.42 million natural and artificial lakes.

Shaded relief map showing the location of the Lena Delta above the Arctic Circle.

The Largest Delta in the Arctic

Caitlin Dempsey

The Lena Delta is a significant wildlife refuge and the largest delta in the Arctic.