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Introduction to HEC-HMS Modeling

Presenter: Andres A. Salazar, Ph.D., P.E. and 1 more

Seminar Date:

Seminar Location: Corpus Christi, TX

Hyatt Place Corpus Christi
6773 South Padre Island Drive
Corpus Christi, TX 78412
Phone: 361-985-8888

This seminar is closed or full.


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


   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


   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

Credit Information:

Who Should Attend

  • Engineers
  • Geologists/Geoscientists
  • Floodplain Managers

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.


Andres A. Salazar, Ph.D., P.E.

Director of Water Resources Engineering for Walter P Moore
Dr. 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 keyto creating an effective sustainable site drainage design.Dr. Salazar provides expertise and direction for site drainage, water recycling, and site water amenities. He joinedWalter P Moore in 2009.

Andrew C. Yung, P.E., CFM

Chief Hydrologist for Walter P Moore
Mr. 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 to users of these programs. Mr. Yung joined Walter P Moore in 1996.

Tuition Costs:

Standard Tuition: $279.00
Online Tuition (pre-registration): $279.00
Group Prices
3 or more People: $259.00

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