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Flashcards in Water Erosion Deck (37):
1

Where is most of the earth's fresh water located?

polar ice

2

What % of earth's water is useable in rivers, lakes, streams, etc?

1/2 %

3

Where is most of the drinking water in the US located?

ground

4

What things occur in the young stage of a river?

Narrow
V shaped
Straight
Steep gradient
fast flowing

5

What things occur during the mature stage of a river?

Gradient lessens
Water slows
Flood plan develops
Meanders develop
Valley widens

6

What things occur during the old stage of a river?

flood plain widens
meanders broaden
yazoo streams
slow moving water
oxbow lakes
levees

7

Rivers carry 3 types of sediment load. What are they?

Solution
Suspension
bedload

8

What is solution?

dissolved material

9

What is suspension?

fine material in turbulence

10

What is bedlad?

heavy particles dragged along bottom

11

The amount of erosion depends on what?

velocity or discharge

12

What is drainage basin?

land that drains into river system

13

What is divide?

high land that separates drainage basin

14

What is discharge?

volume of water passing a point in a given time

15

What is floodplain?

wide level area that borders a river and is covered by water during a flood-rich soil- good for crops

16

Describe recession by water

face of waterfall eroding away moving the falls upstream

17

What is an example of recession by water?

Niagara Falls

18

What can change the carrying power of a river?

velocity and discharge
-Drought/flood
-channel width
-slope/gradient

19

A fan shaped deposit formed when a river meets a slower moving body of water is called a what?

Delta

20

A deposit formed on land when a stream enters a flat plain is called what?

alluvial fan

21

Hot water coming to the surface through a wide opening is called a what?

hot springs

22

IF this water travels upward through mud, it is a what?

mud pot

23

Old faithful is an example of what?

geyser

24

What is a geyser?

a hot spring with a small opening through which steam periodically escapes

25

______________ is the name for regions with caves, sinkholes, and natural bridges

Karst topography

26

What is stalagmite?

carbonate dripstone deposition on cave floor

27

What is stalactite?

carbonate dripstone deposit on cave roof

28

What is column?

when a stalactite and stalagmite meet

29

What is a sink hole?

roof of cavern weakens and collapses through to the surface

30

What is aquifer?

permeable layer of rock that carries water

31

What is groundwater?

water stored underground

32

What is the difference between porosity and permeability?

porosity- % of rock that is pore space
permeability- rate/ability for water to pass through

33

What 2 factors affect porosity?

1) particle shape
2) particle sorting

34

What does it mean if a rock is impermeable?

Water cannot pass through

35

What is an example of an impermeable rock?

shale and clay

36

How deep is the water table below the surface?

depends

37

What changes the depth of the water table?

climate
season
depth of impermeable layer
topography
land use
type of rock
vegitation