Rivers - Hydrological Cycle Flashcards

1
Q

Evaporation

A

Water lost from the ground as liquid into water vapour from energy from the sun.

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2
Q

Percolation

A

Water seeping deeper below the ground surface

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3
Q

Groundwater flow

A

Water flowing through the rock layer parallel to the ground surface

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4
Q

Throughflow

A

Water flowing through the soil layer parallel to the ground surface

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5
Q

Surface Runoff

A

Water flowing over the surface of the ground

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6
Q

Condensation

A

Water cools down and changes state from water vapour to liquid = clouds 

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7
Q

Precipiation

A

Moisture falling to the ground in any state e.g., rain, snow, sleet, hail

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8
Q

Transpiration

A

The process where plants absorb water through the roots and then give off water vapor through pores in their leaves.

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9
Q

Infiltration

A

The process by which water on the ground surface enters the ground

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10
Q

Interception

A

Water being prevented from reaching the surface by trees of grass

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11
Q

Drainage Basin

A

An area of ground which drains into a river

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12
Q

Source

A

start place of a river or stream

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13
Q

Mouth

A

place river enters the sea or a lake

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14
Q

Tributary

A

smaller river which flows into a bigger river

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15
Q

confluence

A

point where two rivers meet

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16
Q

watershed

A

area of land that separates water flowing to different rivers

17
Q

long profile

A
  • shows river’s gradient change between its source and mouth
  • concave shape
18
Q

cross profile

A
  • shows u channel and valley
  • certain points
19
Q

attrition

A

rocks and stones smash against each other, creating smaller rocks

20
Q

hydraulic action

A

sheer water pressure breaking down rocks

21
Q

solution

A

chemicals dissolve minerals/sediment and carries them away in solution

22
Q

abrasion

A

material rubbing against other things

23
Q

load

A
  • sediment carried by a river, sea or ice
  • comes from erosion and riverbanks
24
Q

traction

A

Boulders and big rocks being rolled down the riverbed

25
saltation
small stones bouncing on the riverbed
26
suspension
sediment is carried down stream
27
solution
chemicals dissolved in the water are taken downstream
28
deposition
* river deposits material its been carrying * bc as it slows down energy decreases
29
upper course
* gradient: steep * channel: shallow and narrow * valley shape: v-shaped * vertical erosion, abrasion * large & angular load * transportation: traction * fast flow * landforms: V-Shaped valleys, waterfalls, gorges
30
middle course
* gradient: gently sloping valley * channel: wider & deeper * vertical + lateral erosion, hydraulic action + attrition + abrasion * medium load * transportation: saltation * medium velocity * landforms: meanders
31
lower course
* gradient: flat * channel: v wide & v deep * valley: wide & open * lateral erosion * small, rounded load * transportation: suspension * slow flow * landforms: ox-bow lakes, floodplains, levees