Geology 304 – Hydrogeology – Spring 2013

Instructor: Steven Earle PhD, P.Geo.

Office: 360/304a

Office hours: 11:00 to 11:30 Tuesday to Friday (but also any time that I’m there)

Telephone: 2756, e-mail: steven.earle@viu.ca

 

Groundwater from the lower Quadra Sand (the gravel layer) trickles over Dashwood Drift and into Nile Creek

 

HYDROGEOLOGY is the study of water in the ground, how it moves, how it interacts with surface water and the surrounding rocks and how we extract and use it.  In Geology 304 we will:

  • discuss global and local water supplies,
  • study the relationships between surface water and groundwater,
  • learn about porosity and permeability in the context of geology,
  • examine groundwater flow, and learn how to understand and predict flow paths and flow rates
  • look at the various ways in which groundwater can be extracted and used, and some of the limitations and consequences of that use,
  • discuss groundwater contamination, preventing it and mitigating the damage if it does happen, and
  • study the nature of the interactions between the water and the rocks and sediments through which it flows, and how those interactions can affect the water quality

 

 

Idealized groundwater flow paths in Nanaimo Group rocks on Saturna Island - from Allen and Suchy, 2001

 

 

GEOL-304 will include lots of field work, practical activities and experiments related to groundwater properties, flow, extraction and quality.  There are several different types of aquifers on Vancouver Island, and we will visit, study and discuss as many as we can.  An important part of the course is an assessment of the incidence and implications of leaks from underground fuel storage tanks at gas stations in the Nanaimo area.

 

Timetable (all in 370/107):

 

Tuesday

Thursday

Thursday (lab)

11:30 to 1:00

11:30 to 1:00

1:00 to 4:00

 

 

The textbook is: Applied Hydrogeology (4th Ed.) by C.W. Fetter. 

The course website can be accessed from the following location: http://records.viu.ca/~earles/.   Click on GEOL-304 – Hydrogeology.  The course outline, the schedule, lecture notes and information and data pertaining to the labs are available on the website.

 

Course topics and anticipated learning outcomes

 

Topic

Learning outcomes

Introduction, course overview, world water supplies

Understand the importance of water and recognize that we do not have unlimited fresh water in Canada.  Become an advocate for water stewardship.

Review of surficial hydrology and connections with groundwater

Understand the connection between surface water (SW) and groundwater (GW), and be able to assess the contribution of SW runoff to GW and of GW to stream flow.

Porosity and permeability

Understand the difference between porosity and permeability.  Gain experience with measuring permeability in several different ways.

Groundwater movement , flow rates, flow nets

Understand how and why GW flows and controls its flow rates and paths.  Be able to predict flow rates and paths in 1, 2 and 3 dimensions.  Learn how to model GW flow using MODFLOW.

Geology of aquifers

Become familiar with different aquifer types, especially those that have examples on Vancouver Island.  Be able to predict GW flow characteristics in the different types of aquifers.

Groundwater extraction

Understand how wells are constructed, tested and used, and how the extraction of well water can affect GW behaviour.  Learn how to test the capacity of a water well.

Groundwater chemical evolution

Become aware of the important natural chemical constituents of GW, and how they vary.  Be able to interpret a GW chemical analysis. Understand some of the processes of water-rock interaction.

Groundwater contamination

Become familiar with the major sources of anthropogenic GW contamination, how contamination can be avoided, and what can be done to mitigate contamination. Understand how aquifer characteristics and other factors contribute to the potential for GW contamination.  Understand the implications of fuel leaking from USTs in the Nanaimo area.

Groundwater and climate change

Understand how the climate change (and related impacts) predicted for our region might affect the quality and quantity of SW and GW on Vancouver Island.

 

 

GEOL-304 leaking UST project

 

The GEOL-304 field project will involve an assessment of the incidence of leakage from underground fuel storage tanks at gas stations in the Nanaimo area, and an examination of the potential implications of that leakage for the quality of our groundwater.  We will also learn about the likely fate of contaminants that leak from underground fuel storage tanks.  You will each be responsible for one site where leakage has taken place, and will be expected to describe the potential impacts based on what you can find out about the hydrogeology of the immediate area. 

 

 

Monitoring wells at two different abandoned gas-station sites in Nanaimo

 

Academic integrity

 

The following standards of academic integrity are copied from the Student Academic Code of Conduct.  All students should read the entire policy document, which can be found on the VIU website at http://viu.ca/policies/policy.asp?rdPolicyNumber=99.01.  

 

STANDARDS OF ACADEMIC INTEGRITY

Students are expected to meet the standards of academic integrity as indicated in this policy.  Standards of academic integrity include, but are not limited to:

  • independently producing the work submitted under your name;
  • properly and appropriately referencing all work (including the use of quotation marks);
  • identifying all collaborators in your work;
  • completing examinations without giving or receiving assistance, excepting those students requiring assistance due to a documented disability;
  • respecting the integrity of examination materials and/or the examination process; and
  • respecting the integrity of computer security systems, software copyrights and file privacy of others.

 

 

Grading (subject to change)

 

Labs

8 @ 3 to 4 marks each

28

Assignments

3 @ 8 marks each

24

UST project

 

20

Final exam

 

28

 

 

 

Proposed Schedule for GEOL-304 in 2013

 

Mon

date

Tuesday

date

Thursday

Thursday lab

Jan.

8

Introduction

10

Precipitation and runoff

no lab

 

15

Hydrographs, baseflow recharge

17

Hydrographs, baseflow recharge

Measuring precipitation and stream flow

 

22

Porosity

24

Permeability

Millstone R. and flow gauge field trip

 

29

Controls on GW flow

31

Confined vs unconfined aquifers

Permeability based on grain-size analysis

Feb

5

Guest Speaker: Margaret Catley-Carlson

7

Hydraulic head

Test Darcy's Law

 

12

MODFLOW

14

Geology of aquifers

Nanaimo Gp. aquifers field trip

 

19

Geology of aquifers

21

Geology of aquifers

Flow-rate and flow-net exercises

 

Reading Break

Mar.

5

Geology of aquifers

7

GW extraction & estim-ating well production

Landfill groundwater field trip

 

12

Groundwater chemistry

14

Groundwater chemistry

Work with Nanaimo Group geochemical data

 

19

Groundwater contamination

21

Fate of liquid fuels in groundwater

Field trip to leaking UST sites

 

26

Work on UST project

28

Work on UST project & guest speaker (Michael Sloan, SLR Consulting)

Apr.

2

GW and climate change

4

Hydrogeologist Gilles Wendling (in class and in the field)

 

9

Nile Ck. Project

11

Nile Creek field trip