Stream

A stream is a continuous body of surface water flowing within the bed and banks of a channel. Streams can have many names depending on their size and place. Big streams are often called rivers, while tiny ones may be called brooks, creeks, rivulets, or runnels.

The flow of a stream is shaped by three main sources: water from rain or melting snow, water that seeps up from the ground, and water from springs. Rain and melting snow can change fast, but spring water flows more steadily.

Streams are very important for nature. They help move water around the world, let animals travel, and give homes to many plants and animals. The land near a stream is called a riparian zone and is a special habitat for wildlife. Studying streams is part of a science called surface hydrology, which helps us learn how water shapes the world.

Types

Brook

A brook is a small stream. It is often fed by a spring or seep. Brooks are tiny and easy to step over. They are shallow and small.

Creek

A creek is a small stream, smaller than a river. In places like Australia, Canada, New Zealand, and the United States, a creek is a small part of a river. In the United Kingdom, India, and some parts of Maryland and New England, a creek can be a narrow waterway affected by tides. These creeks are often found near salt marshes or mangroves.

River

A river is a large stream. It is much wider and deeper than a creek. Rivers are hard to cross and can sometimes be used for travel by boats.

Runnel

A runnel is a narrow channel between sandy ridges on a beach or floodplain. It is also called a swale.

Tributary

A tributary is a small stream that flows into a larger stream or river. It flows into the larger river and not directly into a lake, bay, or ocean.

Distributary

A distributary is a stream that branches off from a main river and flows away from it. This often happens near river deltas or flat areas close to the coast.

Other names

Streams have different names in different places. In the United States, small streams might be called creeks or runs. In some areas, like Maryland and Virginia, they use the word branch. In parts of New York and Pennsylvania, streams are called kills, a word from the Dutch language.

In the United Kingdom, streams may be called beck or burn. In Scotland, you might hear the word allt, and in Wales, they use nant. These names show how streams look and act differently in nature.