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

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

Thursday, December 1, 2022 
9:00 am – 4:20 CST (including a 30-min. break)


Presented by
Gerald Blackler, Ph.D, P.E., D.WRE

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

Working with the HEC-HMS User Interface
Program file and project management
Data entry and editing

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

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

Small Watershed Modeling Demonstration and Flood after Fire Methodology

Large Watershed Modeling Demonstration


 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:
6.5 PDHs

Landscape Architects:
6.5 PDHs

Floodplain Managers:


Continuing Education Credit Information
This webinar is open to the public and is designed to qualify for 6.5 PDHs for professional engineers and 6.5 HSW continuing education hours for landscape architects in all states that allow this learning method. Please refer to specific state rules to determine eligibility.

The Landscape Architecture Continuing Education System has approved this course for 6.5 HSW PDHs. Only full participation is reportable to the LA CES.

This webinar has been approved by the Association of State Floodplain Managers for 6.5 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).


Gerald Blackler Ph.D P.E. D.WRE

University of Colorado-Denver College of Engineering, Design and Computing
Dr. Blackler is a board certified, licensed, and experienced water resources engineer specializing in flood recovery, applied hydraulics, hydrology, the engineering of stormwater systems, and open channel hydraulics for urban, rural, and flood prone areas due to changes in fire and how those changes effect natural stream systems. He brings practical and theoretical experience to any project or classroom. Dr. Blackler is a consultant who manages many technically challenging projects, he has six (6) peer reviewed publications in ASCE’s journals of hydrology, hydraulics, and irrigation and drainage. He is an instructor at UC Denver’s College of Engineering Design and Computing for the Hydrologic, Environmental, and Sustainability Engineering Program (HESE). Additionally, Dr. Blackler is an honorably discharged veteran of foreign wars and served with the US Army Corps of Engineers under the 4th Infantry Division for OIF and OEF combat tours.