Rivers

?
  • Created by: Joseph15
  • Created on: 14-12-15 11:46
Boulders and pebbles are rolled along the river bed at times of high discharge.
Traction
1 of 22
Sand sized particles are bounced along the river bed by the flow of water.
Saltation
2 of 22
Fine clay and sand particles are carried along within the water even at low discharges.
Suspension
3 of 22
Some materials, such as calcium carbonate, dissolve in water. This requires very little energy.
Solution
4 of 22
The banks and bed of a river are worn away. The key type of erosion at this stage is abrasion and its dominant direction is lateral.
Erosion
5 of 22
Greater discharge at this stage means more energy, so the river can carry material including rocks, sands, silts and clay (the river’s load).
Transport
6 of 22
A river can drop its load when discharge falls or its velocity decreases.
Deposition
7 of 22
a winding bend in a river that causes lateral erosion.
Meander
8 of 22
a free-standing, U-shaped body of water created when a winding river breaks through a thin meander neck and continues via this easier course. The meander loop is left cut off from the main river.
Oxbow lake
9 of 22
As a river winds across the land the water is pushed to the outside of its bends where it flows at a greater velocity, causes undercutting by abrasion and forms a cliff beneath the bank.
River cliff
10 of 22
The water flows more slowly at the river’s inner bend, so deposition of material occurs here and forms a gentle slope from the bank.
Slip-off slope
11 of 22
the low-lying ground adjacent to a river that is subject to flooding.
Flood plain
12 of 22
raised banks each side of the river channel.
Leeves
13 of 22
a series of beds formed at the mouth of a river where the decrease in current causes deposition. The coarsest load is dropped first forming a flat topset bed, while silt and clay is carried further out to sea, forming foreset and bottomset beds.
Delta
14 of 22
the bed and banks of a river are eroded by the force of the water.
Hydraulic action
15 of 22
a river’s load is thrown, sometimes at high velocity, against the bed and banks, wearing them down.
Abrasion
16 of 22
the load of a river knocks against itself, smoothing rocks and breaking them down into smaller particles.
Attrition
17 of 22
the bed and banks of a river are dissolved.
Corrosion
18 of 22
a steep-sided, narrow valley shape caused by a combination of a river’s vertical erosion and the gradual weathering of the valley sides.
V-shaped valley
19 of 22
a series of interlocking hills either side of a river, formed when it is forced to wind around hard rock which it lacks the energy to erode (due to low discharge).
Interlocking spurs
20 of 22
cascading water where a river flows over a vertical drop from hard, resistant rock to a softer rock beneath.
Waterfall
21 of 22
a relatively shallow section of a river where the gradient steepens and water is fast and turbulent.
Rapids
22 of 22

Other cards in this set

Card 2

Front

Sand sized particles are bounced along the river bed by the flow of water.

Back

Saltation

Card 3

Front

Fine clay and sand particles are carried along within the water even at low discharges.

Back

Preview of the front of card 3

Card 4

Front

Some materials, such as calcium carbonate, dissolve in water. This requires very little energy.

Back

Preview of the front of card 4

Card 5

Front

The banks and bed of a river are worn away. The key type of erosion at this stage is abrasion and its dominant direction is lateral.

Back

Preview of the front of card 5
View more cards

Comments

No comments have yet been made

Similar Geography resources:

See all Geography resources »See all Water and rivers resources »