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A boat floats on the Mekong, in Laos South America's Amazon River (dark blue) and the rivers which flow into it (medium blue). The darker green marks the Amazon's drainage basin or watershed. A river is a natural freshwater stream that flows on land or inside caves towards another body of water at a lower elevation, such as an ocean, lake, or another river.A river may run dry before reaching ...
Learn about the features, functions, and history of rivers, the large natural streams of flowing water. Explore the anatomy, water cycle, erosion, and deltas of rivers with photos and examples.
A comprehensive list of rivers, organized primarily by continent and country. Find rivers by length, discharge, age, name, etymology, and more.
The U.S. Geological Survey's Streamer application allows users to explore where their surface water comes from and where it flows to. By clicking on any major stream or river, the user can trace it upstream to its source(s) or downstream to where it joins a larger river or empties into the ocean. Real-time streamflow and weather data can also be overlain on the map, allowing users to see the ...
Learn about the largest, longest, and most sacred rivers on the planet, from the Amazon to the Mekong. Discover their locations, features, histories, and significance for ecosystems and cultures.
river, (ultimately from Latin ripa, "bank"), any natural stream of water that flows in a channel with defined banks . Modern usage includes rivers that are multichanneled, intermittent, or ephemeral in flow and channels that are practically bankless. The concept of channeled surface flow, however, remains central to the definition. The word stream (derived ultimately from the Indo-European ...
Learn about the formation, uses, and sources of water flowing on the Earth's surface. Explore how rivers are part of the water cycle and how they are affected by human activities.
Learn what makes rivers so amazing, from their formation and features to their ecology and importance. Discover how rivers change over time and space, from the uplands to the sea, and what features they create along the way.
Learn what a river is, how it is formed, why it is important, and how it relates to the water cycle. Explore rivers with videos, activities, and quizzes for primary school students.
A new chapter of river mapping reveals the true intricacies of river flow as headwaters feed consecutively larger tributaries that surrender their water to the main stream. Most rivers are now yoked with dams and reservoirs, but on this map, rivers run free.