subsurface flow

Question 1

Is a geologic formation,

sediment, or rock that is

surrounded by sediment

beneath the ground and

contains a body of water

that has been contained by

at least one confining layer.

Answer 1

CONFINED AQUIFERS

Question 2

L a y e r t h a t

s l o w s b u t d o e s

n o t c o m p l e t e l y

s t o p s w a t e r

f r o m p a s s i n g

t h r o u g h

Answer 2

AQUITARD

Question 3

L a y e r t h a t i s

i m p e r m e a b l e o r

d o e s n o t a l l o w

a n y a m o u n t o f

w a t e r t o p a s s

t h r o u g h

Answer 3

AQUILUDE

Question 4

Is a body of water that is not

silt or rock and is close

beneath the surface. During

rain and snowfall, this

aquifer receives direct

penetration from the

surface. The saturated

zone’s surface is known as

the water table.

Answer 4

UNCONFINED

AQUIFER

Question 5

A fundamental principle in fluid mechanics
that describes the flow of a fluid through a
porous medium.

Answer 5

DARCY’S LAW

Question 6

An aquifer below the land surface that is saturated by water.

Answer 6

Confined Aquifer

Question 7

The level to which the water rises is called ____________________

Answer 7

potentiometric surface

Question 8

is where water flows of the borehole under pressure.

Answer 8

Artesian flow

Question 9

defined as a body of water formed from groundwater, rain water runoff and stream with its water table or upper surface open to the atmosphere.

Answer 9

Unconfined Aquifer

Question 10

How an unconfined aquifers recharge?

Answer 10

-via infiltration or snowmelt
-rain or stream of water
-human activities

Question 11

How an unconfined aquifer discharge

Answer 11

through natural discharge via springs, seepage, evapotranspiration, and artificial extraction such as wells and drainage system.

Question 12

is normally used to assess flow towards a pumping well in unconfined aquifers under steady-state conditions.

Answer 12

The Dupuit-Thiem

Question 13

It describes the
movement of
groundwater
towards or away
from a point (such
as a well) in a radial
direction

Answer 13

RADIAL GROUNDWATER FLOW

Question 14

The time interval between
recharge and discharge points is
defined as the __________________

Answer 14

travel time of
groundwater flow

Question 15

is used in several
applications, such as
designing exploitation and
monitoring systems, identifying
areas affected by
contaminant migration and
assessing the potential for
natural attenuation of
pollutants.

Answer 15

Travel time

Question 16

The left-hand boundary is
impermeable (flow divide), and
flow discharges through the
right-hand fixed-head boundary.
The travel time is calculated
between the two arbitrary
points: xi(the departure point at
the water table) and x.

Answer 16

Aquifer system with a no-flow boundary and fixed head boundary condition and
constant groundwater recharge

Question 17

The system is bound
by two fixed-head
boundary conditions
and contains a flow
divide between
these two
boundaries.

Answer 17

Aquifer system with two fixed head boundary conditions, a flow divide within the system and
constant groundwater recharge

Question 18

A velocity of __ foot per
day or greater is a high
rate of movement for
ground water, and
ground-water velocities
can be as low as ___ foot
per year or __ foot per
decade.

Answer 18

1

Question 19

Flow
rates in aquifers are
commonly measured in
____ per day.

Answer 19

feet

Question 20

The system is bound by two
fixed-head boundary
conditions and contains a flow
divide outside of these two
boundaries. Flow is
unidirectional between the
constant head boundaries.

Answer 20

Aquifer system with two fixed head boundary conditions,
a flow divide outside of the system and constant
groundwater recharge