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

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

Monday, January 31, 2022
8:30 am – 5:00 pm CST (incl. a 60-min break)


Presented by:
Mary L. Paist-Goldman, P.E.

Applications for Hydrologic Analysis
Watershed studies
Stormwater management
Regional flood models
Stream flow assessment

Hydrologic Principles
Hydrologic cycle
Watershed delineation methodology
Rational Method
SCS Methods

History and Development of US Army Corps HEC-HMS Software
HEC-HMS Application User Interface
Program file and project management
Data entry and editing

Building a Small-Scale Watershed Model
Data required
GIS data usage
Model setup
Analysis requirements

Model Output and Troubleshooting
Results and reporting
Mapping capabilities
Results interpretation
Troubleshooting tips

Demonstration of Small Watershed Model
Live demonstration of a small-scale HMS model

Building a Large-Scale Watershed Model
Data required
GIS data usage
Model setup
Analysis requirements
Modeling tips

Demonstration of Larger Watershed Model
Live demonstration of a larger scale HMS model

Other Applications in HEC-HMS
Dam breach analysis
Irrigation design
Stormwater routings
Urban flood studies


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 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:
7.0 PDHs

Landscape Architects:
7.0 HSW CE Hours
(No NJ credit)

LA CES:    (LA CES credits only available for attending live Webinar)
7.0 HSW PDHs

Floodplain Managers:


Continuing Education Credit Information
Introduction to HEC-HMS Modeling
This webinar offers 7.0 PDHs to professional engineers in all states and 7.0 HSW continuing education hours to landscape architects licensed in all states except New Jersey.

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). HalfMoon Education is deemed an approved continuing education sponsor for New York engineers and landscape architects via its registration with the Landscape Architecture Continuing Education System (Regulations of the Commissioner §68.14(i)(2) and §69.6(i)(2)). Other states do not preapprove continuing education providers or courses.

The Florida DBPR Board of Landscape Architecture generally accepts courses approved by the Landscape Architect Continuing Education System. Landscape architects licensed in Florida are encouraged to review The 2021 Florida Statutes, 481.313(4) to determine course eligibility.

The Landscape Architecture Continuing Education System has approved this course for 7.0 HSW PDHs. Only full participation is reportable to LA CES.

This seminar has been approved by the Association of State Floodplain Managers for 7.0 CECs for floodplain managers.

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

Principal and Owner of Rippled Waters Engineering, LLC based in New Jersey
Ms. Paist-Goldman has more than 20 years of experience in the fields of wetland and stream restoration, stormwater management, regulatory compliance, hydrology and hydraulics, dam safety, and wastewater management. Prior to founding Rippled Waters Engineering in 2018, Ms. Paist-Goldman served as principal engineer and director of Engineering Services at Princeton Hydro. Throughout her career, Ms. Paist-Goldman has designed dozens of projects with low impact development techniques, green infrastructure, and with a focus on water quality – particularly in regard to TMDL compliance. She has designed rain gardens, cistern systems for water re-use in the form of landscape irrigation, bioretention islands, manufactured LID devices, and constructed wetlands. She has developed projects with goals of zero discharge upon completion, groundwater recharge to address aquifer deficits, and retrofits to reduce water quality impacts on Category One waters and EV streams.