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Flashcards in Chapter 7 Deck (27):
1

An impermeable bed that hinders or prevents groundwater movement

Aquitard

2

A well in which the water rises above the level where it was initially encountered

Artesian well

3

A naturally formed underground chamber or series of chambers most commonly produced by solution activity in limestone

Cavern

4

A cone shaped depression in the water table immediately surrounding a well

Cone of depression

5

An equation stating that groundwater discharge depends on the hydraulic gradient, hydraulic conductivity, and cross-sectional area of an aquifer

Darcy's law

6

An artisan well in which water flows freely at Earths surface because the pressure surface is above ground level

Flowing artisan well

7

Streams that gain water from the inflow of groundwater through the stream bed

Gaining (effluent) stream

8

A fountain of hot water ejected periodically from the ground

Geyser

9

Water in the zone of saturation

Groundwater

10

A spring in which the water is 6-9 degrees C warmer than the mean annual air temperature of its locality

Hot spring

11

The slope of the water table. It is determined by finding the height difference between two points on the water table and dividing by the horizontal distance between the two points

Hydraulic gradient

12

A type of topography formed on soluble rock (especially limestone) primarily by dissolution. It is characterized by sinkholes, caves, and underground drainage.

Karst topography

13

The volume of open spaces in rock or soil

Porosity

14

An artesian well in which water does not rise to the surface because the pressure surface is below ground level

Nonflowing artesian well

15

Stream that loses water to the groundwater system by outflow through the streambed

Losing (influent) stream

16

A measure of a materials ability to transmit water

Permeability

17

A depression produced in a region where soluble rock had been removed by groundwater

Sinkhole

18

A localized zone of saturation above the main water table, created by an impermeable layer (aquiclude)

Perched water table

19

A collective term for the dripstone features found in caverns

Speleothem

20

A flow of groundwater that emerges naturally at the ground surface

Spring

21

The icicle-like structure that hangs from the ceiling of a cavern

Stalactite

22

The column like form that grows upward from the floor of a cavern

Stalagmite

23

The upper layer of the saturated zone of groundwater

Water table

24

An opening bored into the zone of saturation

Well

25

Zone near earths surface where pores and opening in rocks are filled or partly filled with water; subsurface water, but not "groundwater"; also called soil moisture

Zone of aeration

26

The zone where all open spaces in sediment and rock are completely filled with water

Zone of saturation

27

Rock or sediment through which groundwater moves easily

Aquifer