Webinar instructions will be emailed before the date of the webinar.

Please log into the webinar 15 – 30 minutes before start time.

Monday, March 20, 2023 
9:00 am – 4:00 pm CDT (including a 30-min. break)


Overview of Groundwater Modeling

  • Common purposes and uses of groundwater models 
  • Types of groundwater models 
  • General process of groundwater modeling   


Principles of Groundwater Flow and Solute Transport

  • Aquifers and aquifer properties 
  • Groundwater flow and hydraulic gradient 
  • Solute transport concepts


Type of Groundwater Models

  • Conceptual models
  • Analytical models
  • Numerical models


Numerical Flow Modeling

  • Governing equation for groundwater flow
  • Model domain and discretization
  • Model boundary conditions (fluxes) 
  • Model material properties 
  • Model calibration



  • Design of MODFLOW
  • MODFLOW processes and packages
  • MODFLOW discretization


Groundwater Modeling Case Studies & Wrap-up

  • Case studies
  • Course summary


Webinar Instructions
All attendees must log-on through their own email – attendees may not watch together if they wish to earn continuing education credit. HalfMoon Education Inc. must be able to prove attendance if either the attendee or HalfMoon Education Inc. is audited.

Certificates of completion can be downloaded in PDF form upon passing a short quiz. A link to the quiz will be sent to each qualifying attendee immediately after the webinar. The certificate can be downloaded from the Results page of the quiz upon scoring 80% or higher.

Webinars are presented via GoToWebinar, an easy-to-use application that can be run on most systems and tablets. Instructions and login information will be provided in an email sent close to the date of the webinar. It is highly recommended that you download, install and test the application before the webinar begins by clicking on the link in the email.

GoToWebinar App requirements:
Windows 7 – 10 or Mac OSX Mavericks (10.9) – macOS Catalina (10.15)

Web Browser:
The two most recent version of the following browsers:
Google Chrome, Mozilla Firefox, Apple Safari, Microsoft Edge
Internet Explorer v11 (or later) with Flash enabled

Internet connection: Minimum of 1Mbps       Hardware: 2GB RAM or more

For more information, visit the Support section at


Professional Engineers:
6.0 PDHs*

6.0 PDHs*

Floodplain Managers:

*Not approved for New York engineers or geologists


Continuing Education Credit Information

This webinar is open to the public and is designed to qualify for 6.0 PDHs for professional engineers* in most states to whom this subject matter is professionally relevant.

This webinar is designed to qualify for 6.0 PDHs for professional geologists*. HalfMoon Education has not applied for state geologist continuing education approval in states requiring such.

HalfMoon Education is an approved continuing education sponsor for engineers in Florida (Provider No. 0004647), Indiana (License No. CE21700059), Maryland, New Jersey (Approval No. 24GP00000700) and North Carolina (S-0130).

This webinar has been approved by the Association of State Floodplain Managers for 6.0 CECs for floodplain managers. Attendance will be monitored, and attendance certificates will be available after the webinar for those who attend the entire course and score a minimum 80% on the quiz that follows the course (multiple attempts allowed).

*This course is not approved for New York engineers or geologists.


Dr. Gordon McCurry, P.G.

Hydrologist at McCurry Hydrology LLC

Dr. McCurry has more than 35 years of experience in hydrology, including the investigation, analysis and modeling of aquifer systems, and assessments of hydrologic impacts. His areas of expertise include the quantitative analyses of flow and solute transport, stream/aquifer interactions, climate change, regulatory permitting, and aquifer remediation. He has been involved with modeling groundwater flow and solute transport since the 1980s. In addition to his consulting career, Dr. McCurry has taught courses on groundwater modeling and hydrogeology since the early 1990s at several universities and to state and federal regulatory agencies.