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Presenter: Gregory H. Nail, PhD, PE

Seminar Date:

Seminar Location: Roanoke, VA

Hyatt Place Roanoke Airport/Valley View Mall
5040 Valley View Blvd., North
Roanoke, VA 24012
Phone: 540-366-4700

This seminar is closed or full.


Due to health and safety concerns regarding the COVID-19 virus, this seminar is now being offered as an online webinar.
Follow this link for registration: https://www.halfmoonseminars.org/seminars/133152/introduction-to-hec-ras-modeling-seminar/roanoke-va

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 – Typical HEC-RAS Encroachment Model

   Encroachment methods 
   Steady flow simulation
   Viewing and interpreting results

Credit Information:

Who Should Attend

  • Architects
  • Engineers
  • Contractors
  • Landscape Architects
  • Floodplain Managers

Professional Engineers
     7.0 Continuing Ed. Hours

Landscape Architects & Architects
     7.0 Continuing Ed. Hours (HSW)
     7.0 LA/CES HSW PDHs
     7.0 AIA/CES LU|HSW

Floodplain Managers
     7.0 ASFPM CECs

     Non-Credit Continuing Ed.

Continuing Education Credit Information

This seminar is open to the public and offers 7.0 continuing education hours to engineers and landscape architects (HSW) and 7.0 HSW CE hours to architects in most states, including Virginia. Educators and courses are not subject to preapproval in Virginia.

This event has been approved by the American Institute of Architects Continuing Education System for 7.0 LU|HSW (Sponsor No. J885) and by the Landscape Architecture Continuing Education System for 7.0 HSW PDHs. Visit www.halfmoonseminars.org for complete AIA/CES information under this course listing. Only full attendance is reportable to AIA/CES and LA/CES.

HalfMoon Education is an approved continuing education sponsor for engineers in Florida, Indiana (License No. CE21700059), Maryland, New Jersey (Approval No. 24GP00000700), North Carolina, and North Dakota. HalfMoon Education is deemed an approved continuing education sponsor for New York engineers, architects and landscape architects.

The Association of State Floodplain Managers has approved this event for 7.0 CECs.

This course offers a non-credit continuing education opportunity to contraction contractors. It has not been preapproved in any state with contractor continuing education requirements.

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


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.

Tuition Costs:

Standard Tuition: $299.00
Online Tuition (pre-registration): $299.00
Group Prices
3 or more people each: $279.00

Each registration includes one copy of a manual prepared by the seminar speakers.

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 (cesupport@aia.org 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

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 steady 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 doug@halfmoonseminars.org 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.