EOSC 329
Groundwater hydrology
Introduction to the theory of groundwater flow;
flow nets; regional groundwater resource
evaluation; well hydraulics; role of groundwater
in geological processes.
Instructor: Dr. Roger Beckie, P. Eng.
EOS-S Rm 261, 604-822-6
EOSC 329
Groundwater Hydrology
University of British Columbia
Example Final Exam
Name:
Student ID:
Instructions
Read the examination before beginning.
This exam consists of 8 pages. Useful formulas and tables are given on the last page.
This is a close
Geology 342
Groundwater hydrology
University of British Columbia
Department of Earth and Ocean Sciences
Name:
Instructions
Midterm Exam # 1
ID:
Read the examination before beginning.
Answer questions in space provided. Be as precise and clear as possible.
EOSC 329
Groundwater hydrology
University of British Columbia
Department of Earth and Ocean Sciences
Midterm Exam 2005
Total points: 47
This exam consists of 4 pages.
1) 1 point.
Select the best caption (Courtesy of The New Yorker):
i) See spot run. See s
Contours indicate
groundwater flow to the
stream
Contours indicate
groundwater flow from the
stream
Gaining stream
Losing stream
Flux from left Q = mdQ (length) = (9.2) (1
m/d) (0.25 m) (5 m) = 11.5 m3/d
Flux from right Q = mdQ (length) = (14) (1 m/d)
(0.
Theis drawdown
A well has been pumping at 70 m3/d in a Theis aquifer for 36 hours. What
is the drawdown at r=10m if the aquifer T = 18 m2/d and S=0.001?
1)Find u from r, S, T, t
2)Find W(u) from table
3)Find drawdown from
Cooper-Jacob approx.
From table:
EOSC 329 Groundwater Hydrology
University of British Columbia
Department of Earth and Ocean Sciences
Lab 5: Boundary Value Problems
As a next step in developing your conceptual model you will have to develop a BVP (Boundary Value Problem) of the
Betul Aqu
EOSC 329: Groundwater Hydrology
University of British Columbia
Department of Earth and Ocean Science
Lab 1: Measurement of Groundwater Seepage and Hydraulic Conductivity along the Wreck
Beach Shoreline
Flow in groundwater is driven by the mechanical energ
EOSC 329: Groundwater Hydrology
University of British Columbia
Department of Earth and Ocean Science
Lab 3 Homework assignment:
Introduction to the Betul Aquifer System Aquifer Geology and Hydraulic Head
Introduction
This assignment and subsequent exercis
EOSC 329: Groundwater hydrology
University of British Columbia
Department of Earth and Ocean Sciences
Lab 4: Flow nets
Your boss is rather keen on flow nets as a means of understanding and analyzing groundwater flow, and
has indicated that you will have t
Geology 342
Hitchhikers Guide to Boundary Value Problems for Groundwater Flow
Dan Walker November 7, 1992
0. Introduction _
This is a quick and dirty guide to boundary value problems as studied in Geology 342. It is
intended to make your life easier. It w
EOSC 329: Groundwater hydrology
University of British Columbia
Department of Earth and Ocean Sciences
Lab 7: Dewatering calculations
Given the success of the Mega Mall shopping centre, Mega Mall Corporation has chosen to construct a high-end
boutique shop
Boundary value problems
Developing conceptual models
How problems are tackled
Purpose
Conceptual model
+
Boundary value problem
Field & background work
1
2
3
Decisions that need to be made are
based on data available, model
results and knowing purposes an
Learning goals
Compute hydraulic heads, fluid pressures,
pressure heads under different scenarios,
given a variety of data.
Convert heads to fluid potential and energy.
Determine hydraulic heads from field data.
Compute flow quantities and direction w
Learning goals
Compute hydraulic heads, fluid pressures,
pressure heads under different scenarios,
given a variety of data.
Convert heads to fluid potential and energy.
Determine hydraulic heads from field data.
Compute flow quantities and direction w
EOSC 329
Groundwater hydrology
Introduction to the theory of groundwater flow;
flow nets; regional groundwater resource
evaluation; well hydraulics; role of groundwater
in geological processes.
Instructor: Dr. Roger Beckie, P. Eng.
EOS-S Rm 261, 604-822-6
Homogeneity/heterogeneity
Isotropy/anisotropy
Details, details, details
http:/subsurface.pnl.gov/software/simtools.shtml
How to deal with this complexity?
http:/www.aps.org/meetings/march/vpr/2010/imagegallery/drainage.cfm
Porous media properties
VV
sand
Aquifer deformation and storage
Transient flow to wells
A
Map
view
Corporation
Farmer A'
A
Q
Q
pump
A'
shale
sst
Corporation: Need 0.2 m3/s.
How long until the water
level drops below the
farmers pump?
siltstone
Farmer: What limits should
be placed on cor
Flow nets
Graphical flow net analysis
h(x,y,z), the solution to a steady-state flow problem,
defines a flow net draw a flow net to solve a flow
problem.
Homogeneous, Isotropic systems
Construction of flow nets is based upon curvilinear
squares.
Roughly eq
Annacis Island Sewage Treatment Plant
expansion
Dewatering strategies:
well points
deep wells
sumps
2E-4 fraser river
dewatering will make slope more stable, but ground may shift.
Final lab:
How much water will
flow into the excavation
for the Megamall?
L
Parameter estimation
Example problem
Predict the dewatering needs
before the excavation is driven
Permeameter
(h2 h1)/ l
Brown, Water Resources Research VOL. 38, NO. 7, 1106
Strategy
Collect observations of the system
Interpret the observations with a the
Aquifers and aquitards
Aquifer - a permeable geologic unit that permits appreciable water to move
through it under field conditions.
Aquitard is a less permeable unit that contains water but is incapable of
transmitting significant quantities of water.
Co
Regional groundwater flow
Regional groundwater flow
What is the role of topography?
What controls recharge and discharge?
Groundwater divide an boundary between two adjacent
groundwater flow systems, found below hill tops and valleys.
Hydraulic head con
Groundwater applications
Landslide and Debris Flow, La
Conchita, CA, 1995
Sequence of events
1) Wet weather
2) One month of dry weather
3) Slow, deep slump failure
No injuries.
Photograph by R.L. Schuster, U.S.
Geological Survey.
http:/landslides.usgs.gov
EOSC 329
Groundwater Hydrology
University of British Columbia
Three point problems
The three point problem is: given three measurements of head, determine the gradient of head in the
plane that contains the measurement points. There are two approaches: 1)