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

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

Friday, September 17, 2021
7:30 am – 3:20 pm CDT (incl. a 30-min break)


Presented by:
Mary Paist-Goldman

Overview of HEC-RAS – Review of Hydraulic Principles
Conservation of energy and momentum
Energy losses and Manning’s equation
Backwater effects

When to use these Applications
Steady flow
Unsteady flow
1D or 2D

Overview of 1D Unsteady Flow Modeling with HEC-RAS
File management
Data entry and editing

Building Your 1D Unsteady Flow Model
Data required
Locating cross sections
Setting boundary conditions
Calculating water profiles in HEC-RAS

Overview of 2D Unsteady Flow Model
Data required
Locating cross sections
Setting boundary conditions
Calculating water profiles in HEC-RAS

Building Your 2D Unsteady Flow Model
Demonstration for standard stream flow
Project file setup
Setting geometry and boundary conditions
Modeling tips

Model Output and Troubleshooting

Other Applications in HEC-RAS
Sediment transport
Water quality


 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

Floodplain Managers:

7.0 PDHs/CE Hours


Continuing Education Credit Information

Advanced HEC-RAS Modeling
This webinar is open to the public and offers 7.0 PDHs to professional engineers
licensed in most states.

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

This course offers 7.0 PDHs/continuing education hours to most licensed/registered
geologists. HalfMoon Education has not applied for state geologist continuing
education approval in states requiring such.

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


Mary Paist-Goldman

Ms. Paist-Goldman has more than 20 years of experience in water resource engineering with a particular focus in stream and wetland restoration and mitigation design. She is the principal and owner of Rippled Waters Engineering, LLC based in New Jersey. Her firm specializes in water resources engineering services for a variety of projects. Prior to starting Rippled Waters in 2018, she served for many years as principal engineer and director of Engineering Services of a Mid-Atlantic regional natural resources firm.

She is an experienced modeler and has worked extensively on design and analysis using a variety of hydrologic and hydraulic programs including HEC-HMS, HEC-RAS, and HydroCAD. Applications for her hydraulic modeling expertise include wetland restoration and mitigation; stream restoration; bridge repair and replacement; and dam repair, replacement and removal. Specifically related to riverine systems, Ms. Paist-Goldman has extensive expertise with stream restoration, large woody debris, natural channel design and bioengineering stabilization techniques. Ms. Paist-Goldman has designed restoration projects of all sizes ranging from a few hundred feet to several miles of stream. These projects are planned for use as mitigation banks or serve as mitigation for development onsite. Working closely with restoration ecologists and landscape architects, Ms. PaistGoldman has designed a variety of stream and wetland habitats including creation, enhancement, restoration, and preservation with a focus on sustainability and regulatory compliance.