GEO-Revision

?
  • Created by: ted
  • Created on: 15-11-21 09:27
what is a watershed
the boundary of the drainage basin
1 of 24
what is a catchment area
the area drained by a drainage basin, which flows into a main stream
2 of 24
what is a confluence
where two streams meet
3 of 24
what is a source
where the river starts, upper course
4 of 24
what is a mouth
where the river ends, lower course
5 of 24
what is a floodplain
the area of a river's course which is flooded in times of high seasonal rainfall, or freak rainfall, usually flat or poorly drained
6 of 24
what is found in the upper course
steep land, erosion is downwards, lots of erosion and not much deposition, rapids/white water, waterfalls, weathering
7 of 24
what is found in the middle course
large floodplain, erosion is lateral, meanders, large discharge, ox bow lakes
8 of 24
what is found in the lower course
low river energy, deposition
9 of 24
name the types of erosion
Hydraulic action, abrasion, attrition, solution
10 of 24
name the types of transportation
saltation, solution, suspension, traction
11 of 24
name the types of weathering
chemical, freeze-thaw, biological
12 of 24
name the type of deposition
deposition
13 of 24
how is a waterfall formed
a waterfall forms when there are horizontal bands of hard rock positioned over exposed, soft rock. The soft rock is eroded quicker than the hard rock and this creates a step.
As erosion continues, the hard rock is undercut forming an overhang.
Abrasion an
14 of 24
how do meanders form
The force of the water erodes and undercuts the river bank on the outside of the bend where water flow has most energy due to decreased friction. This will form a river cliff.
On the inside of the bend, where the river flow is slower, material is deposite
15 of 24
how does an ox bow lake form
Over time the meander becomes tighter, until the ends become very close together. As the river breaks through, e.g. during a flood when the river has a higher discharge and more energy, and the ends join, the loop is cut-off from the main channel. The cut
16 of 24
how does a delta form
A delta is formed in the lower course of a river when the river reaches the sea, or another still body or water such as a large lake. The river slows down and loses energy as there is now no limiting chanel for the river to flow through. The competence of
17 of 24
what is meant by the term discharge
the volume of water in a river
18 of 24
what does a hydrograph measure
rainfall and discharge in a river before and after a storm
19 of 24
what is lag time
the time between peak rainfall and peak flow
20 of 24
what is peak flow
the point of time where the CUMECS is at its the highest
21 of 24
what is base flow
the normal CUMECS that flow through the river outside a storm
22 of 24
what is hard engineering
an attempt to control rivers by using technological solutions which often includes large scale building projects
23 of 24
what is soft engineering
enhancing the natural environment to reduce the affects of floods
24 of 24

Other cards in this set

Card 2

Front

what is a catchment area

Back

the area drained by a drainage basin, which flows into a main stream

Card 3

Front

what is a confluence

Back

Preview of the front of card 3

Card 4

Front

what is a source

Back

Preview of the front of card 4

Card 5

Front

what is a mouth

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 »