20th Salt Water Intrusion Meeting

June 23-27, 2008

Naples Beach Hotel & Golf Club l Naples, Florida, USA

Optional Pre-Conference Short Course - FULL

“Variable Density Modeling and Hydrogeochemical Analysis of Seawater Intrusion”

Dates: Friday, June 20 – Sunday, June 22, 2008

Location: The Naples Beach Hotel & Golf Club, Naples, Florida, USA
A block of guest rooms has been reserved for short course participants at the special SWIM Conference room rate of $125 per night (plus 10% tax) up to 4 people in a room. Reservations must be made by May 7, 2008 and be sure to state that you are a Salt Water Intrusion Meeting participant in order to qualify for the special rate.

NOTE: The guest room block and group rate that has been negotiated with the hotel includes costs incurred to provide us with the large quantity of meeting space we require for our meetings. If we do not occupy a sufficient amount of guest rooms throughout the meeting, we will incur additional costs for meeting room rental charges. Therefore, we encourage all meeting participants to stay in the host hotel. Consequently, guests not staying at the Naples Beach Hotel during the conference will be charged a $100 facilities fee to cover their portion of meeting room rental charges incurred. [Explanation of Facilities Usage Fee]

Registration Information - FULL

Advance registration is required by April 1, 2008. Enrollment will be on a first come, first serve basis to the first 20 registered participants. Register early to ensure your ability to participate. The registration fee covers instructor participation, daily refreshment breaks, meeting room equipment, and
a signed Certificate of Completion.


Registration Fee

Pre-Con Short Course (Professional) $ 750.00 
Pre-Con Short Course (Student) $ 250.00 

Refund Policy for Optional Pre-Conference Short Course: Requests for registration refunds will be honored if written notice of cancellation is received by the Office of Conferences and Institutes on or before Friday, April 4, 2008. A $75.00 processing fee will be deducted from all student refunds and a $150 processing fee will be deducted from all regular attendee refunds. No refunds will be honored for cancellations after Friday, April 4, 2008.

Note: Your registration is not valid until you have successfully completed the online registration process, payment has been received and you have received a printable confirmation page and an email confirmation. This is the only registration receipt you will receive so make sure to keep a copy for registration verification.

Course Objective: Traditionally, variable density flow modeling and hydrochemical analysis in coastal areas were separate disciplines. Over the past few years, however, these two fields have become increasingly integrated and coupled codes have been developed that simulate both solute transport under variable-density conditions and chemical reactions. To keep up to date with the latest developments and effectively apply the latest generation of codes requires more and more skills from hydrogeologists working in coastal areas. The aim of this short course is therefore to become familiar with the basic concepts of both disciplines. The course will be taught by five experts in the field.

Who Should Attend: Practitioners, graduate students and experts in either variable density modeling or hydrogeochemical analysis

Expected background:

  • Understanding of groundwater flow (Darcy’s law, continuity)

  • Familiarity with MODFLOW or other groundwater flow simulators

  • Basic understanding of aquatic chemistry (e.g. pH, concentration units)

Materials to bring: Participants need to bring own laptop

Expected outcomes:

  • Knowledge of the relevance and dynamics of seawater intrusion

  • Understanding of the mathematical principles of variable density flow

  • Knowledge of the relevant hydrochemical processes in coastal aquifers

  • Overview of natural tracers to recognize water types and chemical processes

  • Hands-on experience with MOCDENS3D/SEAWAT and PHREEQC-2

  • Exposure to case studies and model applications

Upon conclusion of the pre-conference workshop, participants will receive a signed Certificate of Completion for 19 hours of instruction and training.


Tentative Short Course Agenda -- Sunset Terrace Room

Friday, June 20, 2008


Setup Laptops


Introduction into Seawater Intrusion


Refreshment Break


Introduction into Seawater Intrusion Continued


Lunch on your own


Variable Density Modeling 1


Refreshment Break


Variable Density Modeling 1 Continued

Saturday, June 21, 2008


Variable Density Modeling 2


Refreshment Break


Variable Density Modeling 2 Continued


Lunch on your own


Hydrogeochemical Analysis


Refreshment Break


Hydrogeochemical Analysis Continued

Sunday, June 22, 2008


Geochemical Modeling


Refreshment Break


Geochemical Modeling Continued


Lunch on your own


Case Studies


Refreshment Break


Continued Case Studies and Wrap Up


Early Bird Social for 20th Salt Water Intrusion Meeting

Daily Overview

Friday Morning: Introduction into Seawater Intrusion

Teachers: Mark Bakker and Gualbert Oude Essink

Summary: General concepts of seawater intrusion: salinity, density differences, interface flow, transition zone, Badon Ghyben-Herzberg principle, freshwater head.

Exercise: Steady interface calculations


Friday Afternoon: Variable Density Modeling 1

Teachers: Gualbert Oude Essink and Alexander Vandenbohede

Summary: An introduction to the mathematical background for numerical modeling of groundwater flow and coupled solute transport will be given. Several benchmark problems (Henry, Elder, Hydrocoin) are discussed, which will illustrate the influence of density dependent flow.

Exercises: 1. Moving vertical interface between fresh and saline groundwater; 2. Evolution of a freshwater lens in a coastal area

Saturday Morning: Variable Density Modeling 2

Teachers: Gualbert Oude Essink and Alexander Vandenbohede

Summary: The influence of time discretization, stability criteria, numerical problems, initial density distribution, and boundary conditions will be shown. The analogue to heat transport will be shown and adaptive and mitigative solutions to control saltwater intrusion will be discussed.

Exercises: 2D case study (Effect Tsunami in Sri-Lanka and the Maldives on freshwater lens; rainwater lenses), 2D case study: inverse density distributions in dynamical equilibrium


Saturday Afternoon: Hydrogeochemical Analysis

Teacher: Pieter Stuyfzand

Summary: Chemical quality of various types of fresh, brackish and salt groundwater in coastal aquifer systems (incl. palaeowaters). Hydrochemical processes during fresh and salt groundwater intrusion. Use of environmental tracers in recognizing different sources of brackish or salt groundwater, and in quantifying 2-3 end-members in mixed, brackish to saline groundwater. Differences between hydrological and hydrochemical systems. Mapping of coastal groundwaters on the basis of their origin (resulting in water bodies) and their hydrochemical facies (quality zonation within a body). Interpretation of the resulting hydrochemical maps in terms of actual and ancient intrusions of both fresh and salt groundwater. Practical aspects of groundwater exploration and quality monitoring in coastal with special attention to preventing bias due to leaky observation wells, sampling and analytical errors.

Exercises: Identification of the salt origin in various groundwater types using multitracing, and quantification of 2-3 end-members in mixed groundwater (Excel). Chemical mass balancing in combination with quantifying the source of salt (sea versus evaporites) and volume percentage of fresh and ocean water in mixed water (Excel)


Sunday Morning: Geochemical Modeling

Teacher: Vincent Post

Summary: Philosophy of geochemical modeling in coastal areas. Description of processes. Introduction of the theoretical concepts of PHREEQC-2. Creation of input files.
Exercise: carbonate dissolution due to mixing and cation exchange during salinization

Sunday Afternoon: Case Studies

Teachers: Mark Bakker, Gualbert Oude Essink, Alexander Vandenbohede, Pieter Stuyfzand, and Vincent Post

Summary: Case studies at different places around the world, including two 3D case study (upconing saline groundwater due to extraction) in The Netherlands and Belgium. On-time departure for the Icebreaker of the SWIM.

Instructor Biographies:

Dr. Mark Bakker teaches at the Delft University of Technology, and develops new methods for groundwater modeling both at the University in Delft and at Kiwa WR. He has taught engineering classes at the Universities of Nebraska, and Georgia, teaches a workshop on Python for Hydrologists, and has authored over 50 papers, of which 14 on seawater intrusion.

Dr. Gualbert Oude Essink is a hydrogeologist at the Geological Survey of The Netherlands (TNO), and is an experienced modeler of salt water intrusion in coastal groundwater systems. He is involved in applied research on the impacts of human activities and climate change on groundwater. He is an Associate Editor of Hydrogeology Journal, has been teaching at the Utrecht University, still teaches at the IHE Delft and gives international courses on groundwater themes.

Dr. Alexander Vandenbohede is a hydrogeologist at Ghent University (Research Unit Groundwater Modelling). He uses groundwater modelling to study salt-fresh water distribution in coastal aquifers, to simulate its historic and future evolution, and to evaluate impacts of human activities (land reclamation, water extraction, etc.). Modelling is also used as a tool with students. He uses available software packages and own developed software.

Dr. Pieter Stuyfzand is a professor at VU University Amsterdam since 2004, and works at Kiwa Water Research since 1981. His research at VU and Kiwa WR mainly focuses on: (a) artificial recharge and river bank filtration, (b) fresh and salt groundwater characterization, their mixing and intrusion, (c) the analysis of hydrological and hydrochemical systems, (d) chemical dating and tracing of groundwater, (e) chemical relations between atmospheric deposition, vegetation and groundwater, (f) the behavior of pollutants in groundwater flow systems; (g) characterization of aquifers, aquitards and sludges, (h) reactive transport modelling by expert systems, and (i) processes of well and aquifer clogging and their prevention.

Dr. Vincent Post works as an assistant professor at the VU University of Amsterdam and teaches regular short courses in PHREEQC-2 and PHT3D as well as university courses in hydrogeology, ground water flow modeling and field hydrogeology. The topic of his PhD thesis (2004) was the salinization of the coastal aquifers of The Netherlands during the Holocene transgressions. His current research focuses on the interaction of fresh and saline groundwater in coastal aquifers and the modeling of reactive transport in these systems.

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