The life of a river.ppt

An introduction to drainage basins and the profile of a river.

1. THE LIFE
OF A
RIVER
FROM SOURCE
TO THE SEA

2. What happens when water reaches the ground?
CONDENSATION
EVAPORATION
PRECIPITATION
SEA
LAND
A SIMPLIFIED WATER CYCLE

3. Key Words
EVAPORATION
CONDENSATION
PRECIPITATION
RUN-OFF
PERCOLATION
GROUND WATER
WATER STORES
When water vapour changes to liquid (cooling)
Water in any form that falls to earth e.g. rain
When the ground water moves through the land
When water vapour changes to liquid (warming)
The water that is stored within the ground
Water that is stored e.g. ground,clouds,air etc.
Water that moves directly along the ground
without penetrating.
Put the correct definition to the given word~one has been done for you

4. River Basins Key Words
•Where a river begins is called the Source.
•A small river meeting a larger river is called a Tributary.
•Where the two rivers join is called the Confluence
•Rapids and Waterfalls form where the river is steep.
•Meanders and Ox Bow lakes form where the river is
flatter.
•Where the river flows into the sea is called the Mouth.
•The part of the river affected by tides is the Estuary
•The area drained by a river is called the Drainage basin.

5. THE LONG PROFILE OF A RIVER
Upper Course Middle Course Lower course
SOURCE
MOUTH

6. The Upper Course
Steep Rapids and Waterfalls

7. The Middle Course
Meanders and Ox Bow Lakes

8. The Lower Course
Deltas, Estuary and the Mouth