Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

GEO LEC > MIDTERM > Flashcards

MIDTERM Flashcards

1
Q

Symbols meaning

A

ι = Hydraulic Gradient
h = loss of head from A to B
L = length of flow over A to B
V = discharge velocity
K = hydraulic conductivity or coefficient of permeability
q = Flow rate
A = cross sectional area
Vs = seepage Velocity
n = porosity
e = void ratio
Q = Volume of water collected
t = duration of water collected
h = constant head between inlet and outlet
a = area of standpipe
h1 h2 = heads
r1 = smaller
r2 = larger or away
D10= effective size
c = constant that varies from 10 to 50mm2
h = capillary rise in mm

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Known as Darcy slope (determines quantity of Darcy flux or discharge)

vector gradient between 2 or more hydraulic head measurements over the length of the flow path

A

Hydraulic Gradient

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

is a measure of a given porous medium ability to permit fluid flow through its voids

Interconnected voids that permits water to pass through under gradient force.

A

Permeability

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

The ability of an aquifer to transmit water through its entire thickness

A

Transmissivity or transmissibility

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Ground-water reservoir, underground layer of water-bearing permeable rock, rock fractures, or unconsolidated materials where groundwater can be extracted using a water well.

A

Aquifer

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Is the rate of flow of water through porous medium per unit cross-sectional area.

Used to solve for coefficient of permeability

A

Discharge Velocity

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Represents the average velocity of flowing groundwater within pores of a porous medium.

Actual velocity (?)

flow of water through soil

A

Seepage Velocity

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Use to determine the coefficient of permeability of coarse-grained soil

A

Constant Head Test

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Who made the Darcy’s Law or Darcy’s permeability of soil

A

Henry Darcy

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Hydraulic Gradient formula

A

ι =h/L

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Discharge Velocity Formula

A

V=K ι
V=Q/At
Q=AV

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Flow Rate Formula

A

Q=K ι A

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Seepage Velocity Formula

A

Vs=V/n

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Porosity Formula

A

n=e/1+e

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Constant Head formula

A

K=QL/Aht

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Falling Head Test

A

K=(aL/At) ln (h1/h2)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

Area formula

A

π/4 (D^2)

18
Q

mm-m
cm-m
mm-cm

A

1/1000
1/100
1/10

19
Q

Unconfined Aquifer Formula

A

Q ln (r1/r2) / π(h1^2 - h2^2)

20
Q

Confined Aquifer formula

A

K= Q ln (r1/r2) / 2πt (h1-h2)

21
Q

Transmissibility formula

A

K= Q ln (r1/r2) / 2π (z1-z2)

22
Q

Total Stress Formula

A

σ =Σδ h

23
Q

Pore water pressure formula

A

u=δ sat(h)

24
Q

Effective Stress Formula

A

σ ‘=σ- u

25
Q

Capillary Stress formula

A

c=S(δ w) (h)

26
Q

Capillary Rise formula

A

h= c/eD10

27
Q

Gamma dry

A

δ d= Gs δ w / 1+e

28
Q

Gamma moist

A

(Gs+Se) δ w / 1+e

29
Q

Gamma sat

A

δ sat= (Gs+e) δ w / 1+e

30
Q

Porosity formula

A

e / 1+e

31
Q

Describes how fast water flows through the soil voids.

A

Hydraulic Conductivity

32
Q

Sponge term, ratio of volume of voids to the total volume of soil

A

Porosity

33
Q

Ratio of empty spaces in soil

A

Void Ratio

34
Q

Meaning of r

A

distance from test well to observation well

r1 is the nearest

35
Q

Meaning of z

A

water level dropped, should be subtracted to height

z1 is for h1

36
Q

Movement of pore water from lower elevation to higher elevation, experiencing upward pull

A

Capillary Rise

37
Q

The pressure transmitted through particles’ contact with each other. (grain-to-grain interaction).

Deformation of soil.

A

Effective Stress

38
Q

It is the pressure of grounwater or fluids in the pore space of rock

A

Pore Water Pressure

39
Q

Have a layer of impenetrable rock or clay above them, usually deeper than unconfined aquifer

A

Confined Aquifer

40
Q

Lie below the permeable layer of soil, being recharged by rainwater or snow melt.

A

Unconfined Aquifer

41
Q

Used to determine the coefficient of permeability of sands/silts/clays

A

Falling Head Test

GEO LEC (3 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions