Rivers begin at their source in higher ground such as mountains or hills, where rain water or melting snow collects and forms tiny streams. When one stream meets another and they merge together, the smaller stream is known as a tributary. It takes many tributary streams to form a river. The great majority of rivers eventually flow into a larger body of water, like an ocean, sea, or large lake. The end of the river is called the mouth. Most settlements were built along major rivers.
What is a river? A river is freshwater flowing across the surface of the land, usually to the sea. Towns would often grow up around these places so that travellers could find a place to sleep or trade goods with each other. The mouth of a river also used to be a very good place to build a town.
Large boats that cross the sea to other countries can sail into the mouth of the river to unload their cargo and to load local produce to take elsewhere.
Small boats can sail up and down the river taking goods to and from the towns that are further inland. Lots of towns are named after river crossings or the rivers that flow through them.
Oxford is named after a ford where people used to take their oxen across the river Thames. Stourbridge is a town in the West Midlands where there is an old bridge over the river Stour.
Dartmouth in Devon is town at the mouth of the river Dart. How many towns in your area are named after rivers or river crossings? Many Welsh towns are named after the rivers that they are on, just as they are in England. Aberystwyth is town at the mouth aber of the river Ystwyth. The faster a river flows, the more erosion it causes in the soil and rocks around it. Over millions of years streams and rivers will remove more and more material from the area around them and cut bigger and bigger paths for themselves.
This is how valleys are created. Even quite small streams can create big valleys over a long time. When the slope that rivers are flowing down stops being so steep, rivers slow down and instead of rushing down the straightest path through the valley, they often start to curve and bend.
These curves are called meanders. Erosion on the bends of the meanders means that they are slowly changing shape and that path the river takes will gradually change. Sometimes the erosion will cut a straight path for the river to take and leave what used to be a bend isolated from the river. Sometimes to make it easier to for boats to travel up and down rivers, people change the way that the river flows. Sometimes they make the river wider or make it deeper so that bigger boats can travel on it.
When the river is too steep and flows to fast, they might put in locks to make it safer for the boats to travel.
Rivers have also been used for a long time to help people work equipment. People would build mills to grind corn and grain near to rivers so that they could use a water wheel to work the mill. The bottom of the wheel would be put into the water, and when the water turned the wheel, the wheel would make the equipment in the mill turn and grind up the grain.
Today, instead of using a wheel to operate equipment, we build big dams across the rivers and use the force of the water to turn turbines and generate electricity to power our machines. We call this hydro-electricity because it is generated from water. Bank — The riverbank is the land at the side of the river. Basin — Rainwater that falls on hills flows down the side of the hills into rivers.
A river basin the group of hills, valleys and lakes that water flows into the river from. Bed — The bed is the bottom of a river. A riverbed can be made of sand, rocks or mud depending on the river. Canal — A man-made waterway that is used so that boats can transport goods across bits of the country where there are no rivers they can use.
Current — The strength and speed of the river. Water always flows downhill; the steeper the ground is, the stronger the current will be.
Delta — A wide muddy or sandy area where some rivers meet the sea. The river slows down and drops all the sediments it was carrying. Downstream — The direction that the water flows, downhill towards the sea Fresh water — Rainwater that falls from the sky has no salt in it. We call this fresh water. Erosion — When a river flows fast it damages the riverbanks and washes bits of them downstream. This makes the river wider. Estuary — Where a river reaches the ocean and the river and ocean mix.
Estuaries are normally wide and flat. Floodplain — The flat area around a river that often gets flooded when the level of water in the river is high. Mouth — The end of a river where it flows into the sea, another river or a lake. Silt — Small bits of dirt or sand that are carried along by a river. Source — The start of a river is its source.
This could be a spring on a hillside, a lake, or a bog or marsh. A river may have more than one source. Stream — A small river Tidal river — At the end of a river, near the ocean, water from the sea flows up the river when the tide comes in. Tributary — A smaller river or stream that joins a big river is called a tributary. Upstream — The opposite direction to the way the water in a river flows Watershed — Water flows down the side of hills into rivers.
But, water that lands on opposite sides of the same hill might flow into different rivers. The watershed is the boundary between two river basins.
As the river flows downstream, it gains more water from other streams, rivers, springs, added rainfall, and other water sources. What is a river? A river is freshwater flowing across the surface of the land, usually to the sea.
30 rows · Other major rivers include the Thames, which flows through Oxford and London, and the .
best resume writing services dc Uk Rivers Homework Help writing for a dissertation the impact of e business on customer service essay. The source of the Nile is sometimes considered to be Lake Victoria, but the lake itself has feeder rivers of considerable size like the Kagera River. Interesting Facts about the Nile river: The Nile River is the longest river in the world.
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