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Rivers
Learning Intention
 How people use rivers?
 Why is water and rivers important?
 Why study rivers?
 What is the hydrolo...
What good are rivers?
Why study rivers?
Rivers
In the news
Deaths
Damage
Effect on man
Food
Water
Rivers
 Water is an important resource we all need to
live and survive. 70% of our bodies are water.
 We see water all a...
List of Water Uses
 In pairs discuss each persons list of uses
for rivers
 Has people’s reliance on rivers
changed? How?
Uses of rivers
Make a spider diagram
 Washing
 Wash hands
 Drinking water
 Swimming
 Bath
 Cooking
 Fishing
 Water...
Top uses of water
Put list of uses for rivers in order of
importance for:
1. Today
2. The past
Past uses of water
 No washing machines/ dish washers– wash by
hand
 More travel by boat, few went by plane
 More baths...
Our use of water
Use water wisely – don’t waste it
Write an account
Write an account of your group
discussion. Write about how our use of
rivers has changed over time.
Name the features
 1. Source: the point at which the river
starts.
 2. Interlocking spurs: where the river
winds between ridges.
 3. Gorg...
Upper course features
V shaped Valley
Name the features
 6. Meander: the river starts to
erode from side to side.
 7. River cliff: the river moves
faster on the outside of the ...
Name the features
 9. Ox-bow lake: during floods the
river cuts through the neck of a large
meander. The outside bend is left as
a shallow ...
River channel
 A river is fresh water flowing across the
surface of the land, usually to the sea. It
flows in a channel. ...
The drainage basin of a river
River terms
Source - The source is the beginning of a stream or
river.
Mouth - The mouth is the end of a river, where it
e...
Give the meanings of these
words
SOURCE
WATERSHED
TRIBUTARY
CONFLUENCE
MOUTH
RIVER CHANNEL
DRAINAGE BASIN
DELTA
Answe
rs
SOURCE
The place where a river starts,
usually in high ground. Can be in
the form of a spring, lake or
glacier.
W...
Fill in the spaces putting in the missing
terms and the missing definitions
The place where a river
starts, usually in hig...
Shaping the land
 The river works to shape the land. It
does it in 3 ways:
1. Erosion – wears away the land
2. Transporta...
What is erosion?
 Erosion is the wearing away of the land
(like sandpaper)
 Weathering breaks up and weakens the
surface...
Processes of erosion
http://www.bbc.co.uk/schools/gcsebitesize/geography/riverswat
er/river_processesrev1.shtml
Processes of Erosion
Erosion involves the wearing away of rock and soil found along
the river bed and banks. Erosion also ...
Types of transport
Transport
Rivers pick up and carry material as they flow downstream. A river
may transport material in four different ways...
Rivers need energy to transport material, and levels of energy
change as the river moves from source to mouth.
 When ener...
Deposition
When a river loses energy, it will drop or deposit some of the
material it is carrying.
Deposition may take pla...
The rivers course
Large boulders in
the river.
River narrow and
shallow
Large rocks
in the river.
River
getting
wider and
...
3 stages of the river
The journey of river from source (where the
river begins) to mouth (where the river ends) is
sometim...
Rivers always flow downwards from
highland areas to lowland areas, through
the upper, middle, and finally the lower
course.
Upper course
The land is steep here.
River has very little water.
River is narrow and shallow.
Continent Longest River Length
Africa Nile River 4,157 miles (6,690 km)
long
Asia Yangtze River 3,434 miles (5,530 km)
lon...
Erosion
 Erosion involves the wearing away of rock and soil found along the
river bed and banks. Erosion also involves th...
Uses of Rivers
Uses of Rivers
Uses of Rivers
Uses of Rivers
Uses of Rivers
Uses of Rivers
Uses of Rivers
Uses of Rivers
Uses of Rivers
Uses of Rivers
Uses of Rivers
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Uses of Rivers

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Uses of Rivers

  1. 1. Rivers
  2. 2. Learning Intention  How people use rivers?  Why is water and rivers important?  Why study rivers?  What is the hydrological cycle?
  3. 3. What good are rivers?
  4. 4. Why study rivers? Rivers In the news Deaths Damage Effect on man Food Water
  5. 5. Rivers  Water is an important resource we all need to live and survive. 70% of our bodies are water.  We see water all around us in the sea, lakes, ponds and rivers.  We are now going to take you on a journey to find where our water comes from and how rivers affect our lives.
  6. 6. List of Water Uses  In pairs discuss each persons list of uses for rivers  Has people’s reliance on rivers changed? How?
  7. 7. Uses of rivers Make a spider diagram  Washing  Wash hands  Drinking water  Swimming  Bath  Cooking  Fishing  Water sports  Dams  Electricity (HEP)  Crops  Transport (move things and people) eg boats  Sprinklers  Factories  Bread  Water golf courses
  8. 8. Top uses of water Put list of uses for rivers in order of importance for: 1. Today 2. The past
  9. 9. Past uses of water  No washing machines/ dish washers– wash by hand  More travel by boat, few went by plane  More baths, less showers  No sprinklers  Less swimming pools – more swims in the lake  No automated car washes  Fewer golf courses – use a lot of water
  10. 10. Our use of water
  11. 11. Use water wisely – don’t waste it
  12. 12. Write an account Write an account of your group discussion. Write about how our use of rivers has changed over time.
  13. 13. Name the features
  14. 14.  1. Source: the point at which the river starts.  2. Interlocking spurs: where the river winds between ridges.  3. Gorge: deep valley caused by wearing back of a waterfall.  4. Waterfall: often where the river crosses a band of harder rock.  5. 'V' shaped valley: produced in upper course because the river cuts down more quickly than the surrounding slopes are eroded.
  15. 15. Upper course features
  16. 16. V shaped Valley
  17. 17. Name the features
  18. 18.  6. Meander: the river starts to erode from side to side.  7. River cliff: the river moves faster on the outside of the bend and cuts into the valley side. The erosion undercuts the ground causing it to collapse, leaving a cliff.  8. River beach (Slip-off slope): the river moves more slowly on the inside of the bend. It cannot carry the larger pebbles and these are dropped here.
  19. 19. Name the features
  20. 20.  9. Ox-bow lake: during floods the river cuts through the neck of a large meander. The outside bend is left as a shallow lake.  10. Flood plain: the river is flowing in a very wide, flat valley. When it floods, it spreads over the flood plain.  11. Levée: during floods the overflowing river is slowed as it leaves its bed. Silt is deposited along the banks first. Over the years the deposits build up into high ridges.  12. Estuary: the open mouth of the river, where it meets the sea.
  21. 21. River channel  A river is fresh water flowing across the surface of the land, usually to the sea. It flows in a channel. The bottom of the channel is called the bed and the sides of the channel are called the banks.
  22. 22. The drainage basin of a river
  23. 23. River terms Source - The source is the beginning of a stream or river. Mouth - The mouth is the end of a river, where it empties into a large body of water. Tributary - A tributary is a river or stream that flows into another stream, river, or lake. Confluence – to the point where a tributary joins a larger river. Drainage basin – the area drained by a river and its tributaries. Watershed – the boundary of the drainage basin which is usually a ridge of high land.
  24. 24. Give the meanings of these words SOURCE WATERSHED TRIBUTARY CONFLUENCE MOUTH RIVER CHANNEL DRAINAGE BASIN DELTA
  25. 25. Answe rs SOURCE The place where a river starts, usually in high ground. Can be in the form of a spring, lake or glacier. WATERSHED The area of highland which forms the edge of a drainage basin. TRIBUTARY A small stream which flows into a larger one, adding water to it and making it bigger. DRAINAGE BASIN An area of land drained by a river and its tributaries. MOUTH The end of a river's course, where it flows into the sea or a lake. CHANNEL The space between the banks of a river where it flows. CONFLUENCE The point where a small stream flows into the main channel, or where 2 small streams join. DELTA A landform where the mouth of a river flows into an ocean, sea, desert, estuary, lake or another river.
  26. 26. Fill in the spaces putting in the missing terms and the missing definitions The place where a river starts, usually in high ground. Can be in the form of a spring, lake or glacier. WATERSHED TRIBUTARY An area of land drained by a river and its tributaries. MOUTH CHANNEL The point where a small stream flows into the main channel, or where 2 small streams join. DELTA
  27. 27. Shaping the land  The river works to shape the land. It does it in 3 ways: 1. Erosion – wears away the land 2. Transportation – moves the material from one place to another 3. Deposition – drops the material and builds new landforms
  28. 28. What is erosion?  Erosion is the wearing away of the land (like sandpaper)  Weathering breaks up and weakens the surface of the rocks while erosion wears away and removes the loosened material
  29. 29. Processes of erosion http://www.bbc.co.uk/schools/gcsebitesize/geography/riverswat er/river_processesrev1.shtml
  30. 30. Processes of Erosion Erosion involves the wearing away of rock and soil found along the river bed and banks. Erosion also involves the breaking down of the rock particles being carried downstream by the river. There are four main forms of river erosion:  Hydraulic action - river wears away the river bank from underneath (force of the water against river banks)  Attrition - rocks being carried by the river smash together and break into smaller particles.  Abrasion - rocks carried along by the river wear down the river bed and banks  Solution - smaller particles are dissolved into the river.  http://www.bbc.co.uk/schools/gcsebitesize/geography/
  31. 31. Types of transport
  32. 32. Transport Rivers pick up and carry material as they flow downstream. A river may transport material in four different ways:  Solution - minerals are dissolved in the water and carried along in solution.  Suspension - fine light material is carried along in the water.  Saltation - small pebbles and stones are bounced along the river bed.  Traction - large boulders and rocks are rolled along the river bed.
  33. 33. Rivers need energy to transport material, and levels of energy change as the river moves from source to mouth.  When energy levels are very high, large rocks and boulders can be transported. Energy levels are usually higher near a river's source, when its course is steep and its valley narrow. Energy levels rise even higher in times of flood.  When energy levels are low, only small particles can be transported (if any). Energy levels are lowest when velocity drops as a river enters a lake or sea (at the mouth).
  34. 34. Deposition When a river loses energy, it will drop or deposit some of the material it is carrying. Deposition may take place when a river enters shallow water or when the amount of water decreases - for example, after a flood or during times of drought. Deposition is common towards the end of a river's journey, at the mouth. Deposition at the mouth of a river can form deltas - for example, the Mississippi Delta
  35. 35. The rivers course Large boulders in the river. River narrow and shallow Large rocks in the river. River getting wider and deeper Small pebbles in river. River at its widest and deepest.
  36. 36. 3 stages of the river The journey of river from source (where the river begins) to mouth (where the river ends) is sometimes called the course of the river. The course of a river can be divided into three main sections:  upper course  middle course  lower course
  37. 37. Rivers always flow downwards from highland areas to lowland areas, through the upper, middle, and finally the lower course.
  38. 38. Upper course The land is steep here. River has very little water. River is narrow and shallow.
  39. 39. Continent Longest River Length Africa Nile River 4,157 miles (6,690 km) long Asia Yangtze River 3,434 miles (5,530 km) long Australia Murray-Darling River 2,310 miles (3,720 km) long North America Mississippi- Missouri River 2,540 miles (4,090 km) + 2,340 miles (3,770 km) long South America Amazon River 3,915 miles (6,300 km) long Europe Volga River 2,290 miles (3,700 km) long
  40. 40. Erosion  Erosion involves the wearing away of rock and soil found along the river bed and banks. Erosion also involves the breaking down of the rock particles being carried downstream by the river.  There are four main forms of river erosion:  Hydraulic action - river wears away the river bank from underneath  Attrition - rocks being carried by the river smash together and break into smaller particles  Abrasion - rocks carried along by the river wear down the river bed and banks  Solution - smaller particles are dissolved into the river  http://www.bbc.co.uk/schools/gcsebitesize/geography/riverswate r/riverprocessesrev1.shtml

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