Geography (rivers And Coast) Flashcards
Bedband/ traction mean?
Larger rocks and boulders are rolled or pushed along the bottom of the river channel .
Saltation meaning
Smaller rocks and pebbles bounce along the bottom of the river channel
Suspension meaning ?
Fine particles of sand and minerals are carried on top of the water
Deposition meaning
The process in a river puts down or drops of material
Describe the upper course of river ?
It begins at the source and the river is small and narrow it will erode downwards to make a v shape valley
Describe a middle course of a river
It is a u shape valley because of erosion they have more water because of the tributaries it starts to erode side to side to make a meandering and it deposit in the middle
What is the source of a river ?
Start of the river
What is Drainage basin
Land that has been drained by a river and it’s tributaries
What’s is a tributaries
A small river
What’s is a confluence
When 2 rivers meet
What is a mouth
End of river
What is a water shed
The edge of a drainage basin
What are the factors affecting the prices within the drainage Basin
Topography, soil types , bedrock type and climate
What is erosion
The process in which a river wears away material from its river banks
What is abrasion
Sand and stores in the river scrape the bed banks wearing them away
Attrition meaning
Rocks and stores knock together and wear each other way
Hydraulic action meaning
Water is forced into cracks in the bank and overtime it breaks up the bank
Solution meaning
Water also dissolves soluble minerals from the bed and banks this helps to brake them up
Describe a ox bow lake
An oxbow lake starts out as a curve, or meander, in a river. A lake forms as the river finds a different, shorter, course. The meander becomes an oxbow lake along the side of the river. Oxbow lakes usually form in flat, low-lying plains close to where the river empties into another body of water
Describe lower course of river
The river flows slowly toward the sea level there will be more decomposition than erosion and it will be really muddy and merky in colour
Where are deltas found
Found in the mouth of large rivers
What is discharge
The amount of water in a river channel at a given time
Lag time
The difference between the heaviest rainfall and the maximum level of discharge
Rising limb meaning
Rising limb meaning a rapid increase in rain water reaching the river
