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

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

Log In
8:00 – 8:30 am CDT
Morning Session

8:30 am – 12:00 pm CDT
Lunch (on your own)
12:00 – 1:00 pm CDT
Afternoon Session
1:00 – 5:00 pm CDT


Presented by
Gregory H. Nail, PhD, PE

Introductions and Exploring Open Channel Hydraulics
Introduction and overview
Exploring open channel hydraulics

Steady One-Dimensional Open Channel Hydraulics Background and Theory
Conservation of energy: steady one-dimensional
Conservation of momentum
Conservation of energy: energy losses
Conservation of energy: computational enhancements
Bernoulli’s equation
Computer based analysis and computations

HEC-RAS and Water Surface Profiling
Required data and boundary conditions
Backwater and forewater calculations
Bridge and culvert modeling

History and Development of HEC-RAS

Demonstration 1 – Building a HEC-RAS Model without GIS
HEC-RAS user interface
Building a hydraulic model without geo-referenced data
Steady flow computational simulation
Viewing of results
Trapezoidal channel example

Demonstration 2 – GIS Basics
Introduction and overview
Geographic versus projected coordinate systems
Raster versus vector files
ArcMap versus ArcCatalog
ArcMap Interface basics
Digital elevation model
Other files

Demonstration 3 – Building a HEC-RAS Model with GIS
RASMapper interface and the projection file
Digital elevation models and geometry creation
Building a hydraulic model with geo-referenced data
Steady flow computational simulation
Display and interpretation of results

Demonstration 4 – Typical HEC-RAS River Reach and Mixed Flow
Subcritical flow
Mixed flow

Demonstration 5 – Typical HEC-RAS Bridge Model
Cross section locations
Expansion and contraction coefficients
Implementing the bridge
Steady flow simulation
Viewing and interpreting results

Demonstration 6 – Typical HEC-RAS Culvert Model
Cross section locations
Implementing the culvert
Steady flow simulation
Viewing and interpreting results

Demonstration 7 – Introduction to 2D-Unsteady Flow Modeling
2D-unsteady flow versus 1D-steady flow
Geometry and computational mesh
Boundary conditions
2D-unsteady flow simulation
Viewing and interpreting results



Webinar Instructions

Each webinar session earns continuing education credit and can be registered for individually. 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 will be provided for each webinar attended and will be sent via email in PDF form about five business days after the conclusion of the series.

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
7.0 PDHs

7.0 HSW CE Hours
7.0 AIA LU|HSW    (AIA credits only available for attending live Webinar)

Landscape Architects
7.0 HSW CE Hours
7.0 LA CES HSW PDHs      (LA CES credits only available for attending live Webinar)

Floodplain Managers


Continuing Education Credit Information
This seminar/webinar offers 7.0 PDHs to professional engineers and 7.0 HSW PDHs/
continuing education hours to architects and landscape architects in most states,
including Tennessee. Educators and courses are not subject to preapproval in

This course has been approved by the American Institute of Architects Continuing
Education System for 7.0 LU|HSW for both in-person and online participation (Sponsor
No. J885). The Landscape Architecture Continuing Education System has approved
this course for 7.0 HSW PDHs for both in-person and online attendance. Only full
participation is reportable to the AIA/CES and LA CES.

The Association of State Floodplain Managers has approved this course for 7.0 CECs for
certified floodplain managers.

Attendance will be monitored, and attendance certificates will be available after the
seminar (in-person) for most individuals who complete the entire event. Attendance
certificates not available at the seminar will be mailed to participants within fifteen
business days.

Completion certificates will be awarded to participants who complete this event online,
and earn a passing score (80%) on the quiz that follows the presentation (multiple
attempts allowed).


Gregory H. Nail PhD PE

Associate Professor, University of Tennessee at Martin

Dr. Nail is an associate professor in the Engineering Department at the University of Tennessee at Martin where he teaches a variety of courses including fluid mechanics, hydraulics and hydrology, and hydraulic and hydrologic modeling. He holds a professional engineer’s license based on having passed both the Civil and Mechanical discipline-specific exams. Prior to coming to UT-Martin in 2002 he worked as a research hydraulic engineer for the United States Army Corp of Engineers for 11 years. He is a former member of the Executive Committee of the Tennessee American Water Resources Association, and he has lectured on various HEC-RAS modeling topics at the Annual Tennessee Water Resources Symposium and at other venues. Dr. Nail earned his B.M.E. degree from Auburn University and his M.S. and Ph.D. degrees from Texas A&M University.

AIA Info

AIA Provider Statement:

HalfMoon Education Inc. is a registered provider of AIA-approved continuing education under Provider Number J885. All registered AIA/CES Providers must comply with the AIA Standards for Continuing Education Programs. Any questions or concerns about this provider of learning program may be sent to AIA/CES ( or (800) AIA 3837, Option 3).

This learning program is registered with AIA/CES for continuing professional education. As such, it does not include content that may be deemed or construed to be an approval or endorsement by the AIA of any material of construction or any method or manner of handling, using, distributing, or dealing in any material or product.

AIA continuing education credit has been reviewed and approved by AIA/CES. Learners must complete the entire learning program to receive continuing education credit. AIA continuing education Learning Units earned upon completion of this course will be reported to AIA/CES for AIA members. Certificates of Completion for both AIA members and non-AIA members are available upon request.

Course Title: Introduction to HEC-RAS Modeling

Delivery Method: Live Online

Course Description: This seven-hour live lecture presentation examines open channel hydraulics for analyzing the flow of water through natural rivers and other channels. and how modeling can be used in the design of bridges and culverts, to forecast the encroachment of rivers and wetlands on development sites, and to model stormwater drainage.

Learning Objectives:

Learning Objective 1:
Learners will be able to discuss the principles of open channel hydraulics, including the conservation of momentum, conservation of energy, Bernoulli’s Equation.

Learning Objective 2:
Learners will be able to model bridges and culverts in HEC-RAS using expansion and contraction coefficients and stead flow simulations, and they will be able to view and interpret the model results.

Learning Objective 3:
Learners will be able create a typical HEC-RAS culvert model using steady flow simulation, and they will be able to view and interpret the results.

Learning Objective 4:
Learners will be able create a typical HEC-RAS river/wetland/floodplain encroachment model and be able to view and interpret the results.

LUs: 7.0                                                                                              LU Type: LU|HSWs.

Prerequisites: Experience with site development

Advance Preparation: None

Program Level: Intermediate

Course Expiration Date: 08/28/2022

Complaint Resolution Policy:

Complaints regarding this course can be emailed to or by calling (715) 835-5900. A HalfMoon Education representative will respond within 72 hours to resolve the complaint, which will include, but not limited to, access to another CE activity at no or reduced cost or a full or partial refund. Each instance will be resolved on a case-by-case situation.


Webinar Price: $289.00