The atmospheric evolution of a species X is given by the continuity equation
The atmospheric evolution of a species X is given by the continuity equation
The atmospheric evolution of a species X is given by the continuity equation
The atmospheric ev
The atmospheric evolution of a species X is given by the continuity equation
The atmospheric evolution of a species X is given by the continuity equation
The atmospheric evolution of a species X is given by the continuity equation
The atmospheric ev
The atmospheric evolution of a species X is given by the continuity equation
The atmospheric evolution of a species X is given by the continuity equation
The atmospheric evolution of a species X is given by the continuity equation
The atmospheric ev
The atmospheric evolution of a species X is given by the continuity equation
The atmospheric evolution of a species X is given by the continuity equation
The atmospheric evolution of a species X is given by the continuity equation
The atmospheric ev
ENVE 4006 /ENVE 5301
Contaminant Hydrogeology
Sept 14 2016
More on flow nets
Well hydraulics for confined and unconfined
aquifers part 1
Review: flow net equations
Flow in one flow channel: QFL = k (h /L) a
This was derived by considering flow through o
I 72 Hydraulic lasting: Models, Methods, and Applications
provide dependable estimates of the actual seepage velocity.
tions of the velocity 5 at various isolated intervals in the b
information on the relative velocit
However, den: "i
orehole does pm
h di
. -r-.a-. 4.
.~
em
72 Ground Water Movement
Recharge area
which
Jiater My 58
Flowingwell - ._
-.
\J Unconfined
aquifer
Figure 3.8
Schematic cross section illustrating the difference between a con
fined and an unconfined aquifer
4. 2 The Storage Properties of Porous Rocks I 15
where the specific storage is defined as the volume of water that a unit volume
releases from or takes into storage when the pressure head in the unit volume
changes a unit amount. The water volume so deriv
Solution for planar constant source, Domenico (1987)
Source Dimensions
Y
Z
C0
15
5
x
y
Disp. x
100
z
Dy
1
Units m/a
Dz
0.01
60
0
0
First term
10 6.41E-005
60
0
0
10 6.41E-005
n
0.01
Decay
0.4
31.536
Vseep
0
Second term
2
pbKd
4
0.1995
Third term
1.99999
2
.o _
Chapter Seventeen
Modeling
Contaminant Transport
1 7. 1 Analytical Approaches
17.2 Programming the
Analytical Solutions
for Computers
1 7.3 Semianalytical Approaches
I 7.4 Numerical Approaches
17.5 Case Study in the
Application of a Numerical
Model
6
[Type here]
Assignment i
Question 1
Impermeable boundary
head =
15 m
A
L=
20 m
B
head = 5
m
Impermeable boundary
Figure 1
a) Draw the flow net for the above problem shown in Figure 1 (assuming homogeneous and isotropic medium). Pay close
attention to the
1
FLOW NETS FOR HOMOGENEOUS ISOTROPIC SYSTEMS
A flow net is a graphical solution to the equations of steady groundwater flow. A flow net consists of
two sets of lines which must always be orthogonal (perpendicular to each other): flow lines, which show
th
ENVE 4006 / ENVE 5703
Contaminant Hydrogeology
Introduction
Review of flow properties in subsurface
formations
1-D flow. Darcys law
What is contaminant hydrogeology?
Hydrogeology pertains to the flow of water in
geologic media (soil, rocks)
Contaminant
CHAPTER 3. SIMPLE MODELS
The concentrations of chemical species in the atmosphere are controlled by four types of
processes:
Emissions. Chemical species are emitted to the atmosphere by a variety of
sources. Some of these sources, such as fossil fuel comb
September 15, 2016
ENVE 4003/5101 Air Pollution and Emissions Control
Tutorial 1 Questions
Learning Outcomes:
After this tutorial, students should:
Know the Ideal Gas Law, the definition of pressure, and the definition of density.
Know the barometric law
Introduction
Solid Waste: nothing new! a consequence of life
Solid waste existed in early civilisations. But was not a
significant problem since population was small!
Current solid waste problems are primarily related to
- URBANIZATION (large quantities
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19,0001it
CH; 250
Precincts 150°C
Air 100 25°C
—u—*
Ccoling water
Methane (CH4) is oxidized with air to produce formaldehyde (HCHO) in a continuous reactor via
the following reaction:
CH4(g) + Ozrg) 9 HCHO(sJ + H2O(g) (1)
A competing reaction is the combust
A boiler is burning methane gas (CI-14) with 20% excess air to generate steam. The methane and
combustion air enter the boiler at 25 C and the combustion gases leave at 150 C. Water comes in at
10 C, and leaves as steam at 130 C. How many kg of steam can
DRYER
The wet solid product in an industrial process is being dried by contacting it with air in a dryer. The
incoming product stream has 1.25 g H20 per g of dry material and is dried to 8% H20 at the exit of the
dryer, The air enters the dryer at 100 °C
PROBLEM ANALYSIS #ThelastONE!
From Wikipedia: Sulfuric acid is a very important commodity chemical, and indeed, a nation's sulfuric
acid production is a good indicator of its industrial strength. World production in 2004 was about 180
million tonnes, with
PROBLEM ANALYSIS #9
(March 30)
Problem 1. Limestone (CaCO3) is converted to calcium oxide (CaO) in a continuous kiln. The
conversion process is represented by the following reaction:
CaCO3(s)
CaO(s) + CO2 (g)
The energy to decompose the limestone is suppl