What is the path of the river called?
A river begins at a source (or more often several sources), follows a path called a course, and ends at a mouth or mouths. The water in a river is usually confined to a channel, made up of a stream bed between banks.
What is it called where a river meets a lake?
The place where a river enters a lake, larger river, or the ocean is called its mouth.
How does a river start?
Most rivers begin life as a tiny stream running down a mountain slope. They are fed by melting snow and ice, or by rainwater running off the land. The water follows cracks and folds in the land as it flows downhill. Small streams meet and join together, growing larger and larger until the flow can be called a river.
What are the main parts of a river?
Rivers are split up into three parts: the upper course, the middle course, and the lower course. The upper course is closest to the source of a river. The land is usually high and mountainous, and the river has a steep gradient with fast-flowing water.
Where are waterfalls found in a river?
Waterfalls often form in the upper stages of a river where it flows over different bands of rock. It erodes soft rock more quickly than hard rock and this may lead to the creation of a waterfall. Formation of a waterfall: The soft rock erodes more quickly, undercutting the hard rock.
What is a waterfall called?
Waterfalls are also called cascades. The process of erosion, the wearing away of earth, plays an important part in the formation of waterfalls.
How do waterfalls form on a river?
The river undercuts the harder rock leaving an overhang which becomes unsupported and collapses into the plunge pool below. After the overhang falls, some of the rocks are swirled around by the river and this helps to form a deep plunge pool below the waterfall.
Is River erosional or depositional?
Vertical erosion has almost stopped and lateral erosion still goes on. The work of the river is mainly deposition, building up its bed and forming an extensive flood plain. Landforms like braided channels, floodplains, levees, meanders, oxbow lakes, deltas etc.
What landforms does running water create?
Besides shaping valleys and forming oxbow lakes, streams also create landforms called alluvial fans and deltas. Both of these landforms are formed by the deposition of sediment.
What two landforms are created by rivers?
Floodplain LandformsNatural Levees—River may be immediately flanked by a buildup of sediment that forms natural levees. Oxbows and oxbow lakes—See below, features of a Meandering Stream Channel.Point Bars—See below, features of a Meandering Stream Channel.Terraces.
What are erosional features?
Definition: A land surface shaped by the action of erosion, especially by running water.
What are the erosional features of a river?
Erosional featuresInterlocking Spurs – As the river cuts its deep V-shaped valley in its upper course, it follows the path of the easies trock to erode. Ox-Bow Lakes – In the lower course of the river meanders can become so pronounced that they can form ox-bow lakes.
Which is the erosional features of wind?
Wind can carry small particles such as sand, silt, and clay. Wind erosion abrades surfaces and makes desert pavement, ventifacts, and desert varnish. Sand dunes are common wind deposits that come in different shapes, depending on winds and sand availability.
What are the 3 erosional processes of rivers?
River Processes: erosion, transportation and deposition & the Hjulström Curve. There are three main types of processes that occur in a river. These are erosion, transportation and deposition.
What are the four ways a river erodes?
The four main types of river erosion are abrasion, attrition, hydraulic action and solution. Abrasion is the process of sediments wearing down the bedrock and the banks. Attrition is the collision between sediment particles that break into smaller and more rounded pebbles.
What is a river process?
River processes shape the land in different ways as the river moves from its source to its mouth. Erosion, deposition and materials rivers carry all contribute to how rivers shape surrounding land.
How do rivers transport?
Rivers transport material in four ways: Solution – minerals are dissolved in the water and carried along in solution. Saltation – small pebbles and stones are bounced along the river bed; Traction – large boulders and rocks are rolled along the river bed.
Why are rivers important for transport?
Why are rivers important? Rivers carry water and nutrients to areas all around the earth. They play a very important part in the water cycle, acting as drainage channels for surface water. Rivers drain nearly 75% of the earth’s land surface.
What is the name for a bend in a river?
A meander is one of a series of regular sinuous curves, bends, loops, turns, or windings in the channel of a river, stream, or other watercourse. The zone within which a meandering stream shifts its channel across either its floodplain or valley floor from time to time is known as a meander belt.