2DHM-V: 2D Hydraulic Modeling for Transportation Hydraulics

2DHM-V Course Description: The primary focus of the course is on the SRH-2D model, a powerful tool developed by the US Bureau of Reclamation (USBR) with sponsorship from both the USBR and the FHWA. Participants will learn modeling principles and techniques through the latest version of the Surface-water Modeling System (SMS). Developed by Aquaveo, SMS serves as a graphical pre- and post-processor for various 2D modeling engines, including SRH-2D. Key lesson topics covered in the curriculum include: preparing model terrain and background data, defining modeling parameters, mesh development, modeling various hydraulic structures, model calibration, effectively reviewing model outputs, and extracting crucial bridge scour parameters, among other essential skills.

SRH-2D, which stands for Sedimentation and River Hydraulics - Two-Dimensional model, is designed to solve the 2D dynamic wave equations, providing outputs such as water surface elevation, water depth, and depth-averaged velocity through a finite volume numerical method. Additional output variables include Froude number and bed shear stress. The model utilizes a flexible mesh and incorporates highly robust and stable numerical schemes, along with a seamless wetting-drying algorithm. It can be operated in either steady-state or unsteady mode and is capable of simulating all flow regimes simultaneously without the need for specialized treatments. Computations for hydraulic structures are performed using standard FHWA methods and procedures, including HY-8, which integrates seamlessly with SRH-2D for culvert calculations. Pressure flow conditions at bridges and large culverts are computed at each element, ensuring detailed results for both simple and complex bridge configurations. SMS provides the capability to interactively construct the finite volume mesh required for SRH-2D, as well as generate all necessary input files for the model.

The program also offers numerous options for graphically displaying output from SRH-2D, enabling effective communication of hydraulic analysis results to both technical and non-technical audiences. Furthermore, the SRH-2D interface within SMS includes a Bridge Scour Tool, which can be utilized to extract hydraulic parameters from multiple simulations to support bridge scour computations, whether performed with the FHWA Hydraulic Toolbox or other preferred user methods.

Course Format: This course is delivered over four consecutive full days of virtual instruction.

Intended Audience: The target audience for this course is engineers who have responsibility for, or desire to work with, the hydraulic analysis and design of highway river crossings.  Course participants should have knowledge of the fundamentals of open channel flow hydraulics.

Agenda:
Day 1

• Software Overview
• Model Simulation
• Hydraulic Modeling
• Model Parameters

Day 2

• Model Parameters, continued
• Hydraulic Principles
• Mesh Development
• Results Review

Day 3

• Results Review, continued
• Calibration and Sensitivity
• Bridge Scour
• Comprehensive Example

Day 4

• Hydraulic Structures
• Background Data
• Wrap Up

There will be one 10-15 minute break mid-morning, a 60 minute lunch break around 12pm local time, and another 10-15 minute break mid-afternoon. 

PDHs: Each participant who successfully completes the course will earn 21 PDHs. To earn PDHs, participants will be required to attend and participate in each session, complete the modeling exercises, complete an ungraded assessment at the end of the course, and complete the feedback form at the end of the course. Certificates of completion that include PDHs will be provided to attendees once these requirements are met.

Successful completion of this training is designed to meet IDOT’s minimum qualification requirement by providing participants with practical instruction in the use, application, and understanding of SRH-2D and SMS modeling for two-dimensional hydraulic analysis.