Rivers Key Words Flashcards

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1
Q

Transpiration

A

Where plants pass water through the their leaves.

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2
Q

Evapo-transpiration

A

Where evaporation and transpiration is likely to be taking place e.g. From a grassed area

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3
Q

Evaporation

A

Where water, as a liquid, is heater and becomes a gas (water vapour). It can occur on land, from rivers and lakes and the sea and the vapour and goes into the atmosphere.

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4
Q

Precipitation

A

All forms of water that fall from the atmosphere e.g. drizzle, rain, hail, sleet and snow.

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5
Q

Surface run-off

A

Where water flows over the land or it can be contained in a river

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6
Q

Groundwater

A

Water that is contained in the pore spaces or cracks within permeable rock only

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7
Q

Permeable rock

A

These rocks allow water to pass through them like a sponge will e.g. Chalk, limestone

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8
Q

Impermeable rock

A

Rocks that don’t allow water to pass through them, that is, it will not sock into the rock

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9
Q

Hydrological cycle

A

Known as the water cycle. It is the constant recycling of water between the atmosphere and the surface of the Earth.

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10
Q

Stores

A

Where water is held.

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11
Q

Transfers

A

Where water flows or moved through the water cycle - a process is taking place.

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12
Q

Stemflow

A

Where water is taken up from the soil via the plant roots and passes up the plant/tree

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13
Q

Infiltration

A

Where water moves into the ground through worm holes, cracks and pores in the soil.

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14
Q

Throughflow

A

Where water moves through the soil down a slope into the stream.

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15
Q

Surface storage

A

Where the water is unable to infiltrate into the ground or flow overland, basically it is a puddle

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16
Q

Water table

A

The level below which the ground is saturated

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17
Q

Groundwater flow

A

Where the water flows underground in permeable rock into a river

18
Q

Baseflow

A

The flow of a stream that is fed from groundwater

19
Q

Channel precipitation

A

Rain that falls directly into the river

20
Q

Interception

A

When rain falls on plants or trees

21
Q

Condensation

A

Where water is cooled and turns from a gas (water vapour) into a liquid.

22
Q

Hydrograph

A

Shows the amount of discharge in a river over time and it can also show precipitation amounts.

23
Q

Discharge

A

The volume of water passing a certain point along the river per second. It is measured in cumecs (m/s). This is often seen by a rise in water level in the river.

24
Q

Peak discharge

A

The maximum (highest) discharge in the river.

25
Q

Basin lag time

A

The time taken to reach peak discharge from peak precipitation level.

26
Q

Baseflow

A

The flow of the river that comes from groundwater.

27
Q

Storm run-off

A

The extra water in the river that results from the precipitation that has fallen

28
Q

Rising limb

A

The line of the hydrograph moving upwards

29
Q

Falling limb

A

The line of the hydrograph moving downwards

30
Q

Confluence

A

The point where one river joins another river.

31
Q

Water shed

A

The boundary between 2 drainage basins, usually a higher ridge of land.

32
Q

Tributary

A

A river that flows into a larger river.

33
Q

Drainage basin

A

The land that is drained by a river and its tributaries.

34
Q

Source

A

Where a river begins e.g. Spring, a marshy area

35
Q

Mouth

A

Where the river meets the sea

36
Q

Attrition

A

When the rocks and shingle on the beach bump into each other and break up into smaller particles.

37
Q

Hydraulic action

A

The force of the waves compressing air in the cracks in a cliff/rock.

38
Q

Corrasion

A

Also known as abrasion. Where large waves hurl beach material against a cliff, chipping pieces away.

39
Q

Corrosion

A

Also known as solution. When salts and other acids in seawater slowly dissolve the rocks on a cliff.

40
Q

Water stress

A

When the amount of water available isn’t enough to meet the demand.

41
Q

Water deficit

A

Areas which don’t have enough rainfall and water.

42
Q

Water surplus

A

Areas which have more water than they need.