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what is the main river process that happens in the youthful stage?
Erosion
Explain the term hydraulic action
The physical force of the moving water wears away and breaks off the rock and soil from the banks and bed of the river
Small stones carried in the rivers load hits off each other. they become smooth and rounded. What is this called?
Attrition
the material transported by the river is called its what?
Load
Name one benefit of flooding
when a river floods, the sediment flows out over floodplains which contains alluvium which is extremely fertile.
Name 4 ways people interact with rivers
Transport, tourism, fishing, settlement, pollution, hydroelectric power, domestic water supply or flooding
Name the 4 river drainage patters
Radial, dendritic, trellised & deranged.
name the feature of river deposition that you have studied
levee
what was the ox-bow lake before more erosion and deposition took place
meander
name an example of a waterfall
Powerscourt, Co. Wicklow
explain what a meander is?
A bend in a river created by erosion and deposition
the force of what causes the overhand to collapse?
Gravity
a plunge pool in a waterfall gets bigger over time through the processes of what?
Hydraulic action & abrasion
name the feature of river erosion that you have studied
waterfall
name one cause of deposition
reduction in the rivers speed, increase in load size, reduction in the river's volume, when gradient levels off
name the 4 types of river transporation
Rolling, bouncing, suspension & solution
Name the 4 types of river erosion
Hydraulic action, abrasion, attrition & solution
As a river travels along its course, it shapes the landscape in the following ways:
Erosion, transportation & deposition
Name the largest river in Ireland
River Shannon
Name a feature found in the old stage
Flood plains, levees or deltas
Name a feature found in the mature stage
Meanders or oxbow lake
Name a landform found in the youthful stage
V-shaped valley, interlocking spurs or waterfall
The area of high ground which separates two drainage basins
water shed
Name the 3 stages of a river
Youthful (upper), mature (middle), old (lower).
The point at which two rivers or streams join together
Confluence