GROUNDWATER HYDROLOGY AND CONTAMINANT TRANSPORT CEVE 518 P.C. de Blanc C.J. Newell

1
GROUNDWATER HYDROLOGY AND CONTAMINANT
TRANSPORTCEVE 518P.C. de BlancC.J. Newell
Test 1 Review
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Administrative

• Test 1
• Next lecture (Thursday, October 6).
• Covers material through steady-state flow (Theim
  equation).
• Can bring in one 8.5 x 11 sheet of notes and page
  issued by instructor at exam.
• Review lecture hand-out will be made available
  for cutting/pasting.
• Homework No. 4
• Will be issued Thursday, October 6.
• Well be due Tuesday, October 18.
• Transient flow problems, pump test analysis.
• Papers for critical review available Thursday,
  October 13.
• Reviews due last day of class.
• Guidance on reviews will be issued next week.
• Field Exercise and Project No. 1
• Thursday, October 13.

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Basin Hydrologic Cycle
Charbeneau, 2000.
4
Basin Hydrologic Cycle Quantitative
Representation
Basin
I
Surface/ Soil
Aquifer
Domenico and Schwartz, 1990.
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Charbeneau, 2000.
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Example Layered Aquifer System
Bedient et al., 1999.
7
Bedient et al., 1999.
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REV Scale Effect
Freeze and Cherry, 1979.
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Moisture Content in Capillary Zone
Charbeneau, 2000.
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Pressure and Elevation Heads - Laboratory
? pressure head z elevation head h total
head
Freeze and Cherry, 1979.
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Pressure and Elevation Heads - Field
? pressure head z elevation head h total
head
Freeze and Cherry, 1979.
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Capillary Rise in a Tube
Domenico and Schwartz, 1992.
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Soil Water Characteristic Curve is a Function of
pore size
Capillary forces hold water tightly in small clay
pores.
Larger sand pores produce lower capillary
pressures.
?r,lay
?r,and
0
nclay
nsand
Charbeneau, 2000.
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Soil Water Characteristic Curve is a Function
of Sorting (Pore Size Distribution)
Relatively wide range of pore sizes from small to
large results in widely varying capillary
pressures.
Narrow range of particle sizes results in
relatively small range of capillary pressures.
Fetter, 1999.
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Who Was Darcy?

• Henry Philibert Gaspard Darcy was born June 10,
  1803 in Dijon, France.
• Admitted to the French School of Bridges and
  Roads in Paris, part of the Corps of Bridges and
  Roads. After graduation, he was eventually
  assigned by the Corps to a position in Dijon.
• In 1828, Darcy designed a 12.7 km system of
  aqueducts to supply the city of Dijon with
  surface water. The system included 28,000 m of
  pressurized surface lines and required no pumps
  or filters.
• Made important contributions to flow and friction
  loss in pipes, created an improved pitot tube
  design, and was the first to postulate the
  existance of a boundary layer in fluid flow.
• In 1856, carried out experiments while
  researching sand filters that lead to Darcys
  Law.
• Died unexpectedly January 3, 1858 from pneumonia
  during a trip to Paris.

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Dupuit Flow in Unconfined Aquifers
Ux
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Unconfined Aquifer with Recharge
xdivide
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Radial Flow to a Well
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Radial Flow to a Well
s
sw
(cone of depression)
S Drawdown Ur Radial flow per unit width
Todd, 1980.
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Principle of Superposition Multiple Wells
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Example Use of Theim Equation to Calculate T
P1
P2
Todd, 1980.