Introduction to HEC-HMS Modeling Seminar
DISCLAIMER
Before purchasing, review the rules of your licensing or certifying entity. It is your responsibility to confirm this course meets your CE requirements. See the credit tab on the course page for details.
What’s Included: Full webinar recording, written course materials, expert instruction, a mandatory quiz, and a certificate upon completion.
Deliverability Timeline: All courses are generally available within 1-2 weeks after the live presentation.
CE Credits: AIA and/or LA/CES accreditation is available by request for courses recorded prior to March 11, 2026. All courses after that date include those accreditations by default, if applicable. With these accreditations, our courses qualify for credit in nearly all states for engineers, surveyors, architects, and landscape architects.
Learn more about the on-demand format in our FAQ or contact us at (715) 835-5900 or customerservice@halfmoonseminars.org
Agenda
Registration: 8:00 – 8:30 am
Morning Session: 8:30 – 11:30 am
Lunch (On your own): 11:30 am – 12:30 pm
Afternoon Session: 12:30 – 4:00 pm
Introduction, History, and Development of US Army Corps HEC-HMS Software
Brief history
Applications of HEC-HMS
Computational categories
Basic Hydrologic Concepts
The Hydrologic cycle and HEC-HMS
User interface
Input, output, and HEC-DSS
Loss Rates
Loss computation assumptions and methods
Accounting for urbanization
Selecting a loss method and estimating parameters
Unit Hydrographs and Rainfall/Runoff Transformation
Assumptions of the unit hydrograph
Derivation and application of the unit hydrograph
Selecting a unity hydrograph method and estimating parameters
Precipitation
Storm distributions
Hypothetical vs. historical storms
Sources of precipitation data
Stream Routing
Purpose, importance, and effects of streamflow routing
Streamflow routing methods
Streamflow diversions and returns
Reservoirs
Purpose, importance, and effects of reservoir routing
Types of reservoirs and detention
Reservoir routing input and output
Calibration and Optimization
Observed data input
Parameters to be calibrated/optimized
Calibration/optimization setup
Using HEC-HMS in Design
Design example walkthrough
Credits
Professional Engineers
6.0 PDHs
Professional Geoscientists
6.0 Continuing Ed. Hours
Floodplain Managers
6.0 ASFPM CECs
Continuing Education Credit Information
This seminar is open to the public. It offers 6.0 PDHs to professional engineers in all states and 6.0 continuing education hours to Texas professional geoscientists. Educators and courses are not subject to preapproval in Texas.
HalfMoon Education is an approved continuing education sponsor for engineers in Florida, Indiana, Louisiana, Maryland, New Jersey, New York (NYSED Sponsor No. 35), North Carolina, and North Dakota.
The Association of State Floodplain Managers has approved this event for 6.0 CECs. Course approved by the ASFPM qualify for Texas floodplain managers.
Attendance will be monitored, and attendance certificates will be available after the seminar for most individuals who complete the entire event. Attendance certificates not available at the seminar will be mailed to participants within fifteen business days.
Speakers
Andres Salazar
Walter P MooreDirector of Water Resources Engineering for Walter P MooreDr. Salazar serves as the director of water resources engineering for Walter P Moore. He is a water resources engineer with more than 17 years of experience in steady and unsteady modeling, river basin and reservoir operations, and water resources planning. Dr. Salazar is an expert with planning and feasibility studies for drainage and water supply projects. He has extensive experience with complex drainage projects across the State of Texas and is proficient in the use of EPA-SWMM, HEC-RAS, HEC-HMS, STORM NET, InfoWorks, and RiverWare computer models. Dr. Salazar has special expertise in hydrologic and hydraulic systems that are key to creating an effective sustainable site drainage design. Dr. Salazar provides expertise and direction for site drainage, water recycling, and site water amenities. He joined Walter P Moore in 2009.
Andrew Yung
Walter P MooreChief Hydrologist for Walter P MooreMr. Yung serves as chief hydrologist for Walter P Moore. Mr. Yung has more than 27 years of experience as an engineer, planner, and hydrologist. He has managed a wide range of engineering projects involving hydrology, hydraulics, master drainage studies, channel modification and hydraulic structure designs, watershed impact analyses, detention facility designs,and dam safety analyses. Mr. Yung has also served as the team leader for independent technical review (ITR) for several federal projects currently under way in Houston. He is very familiar with HEC-HMS/ HEC-1, HEC-RAS/HEC-2, HEC-DSS, and HEC-SSP and provides technical support and training tousers of these programs. Mr. Yung joined Walter P Moore in 1996.