Udemy
    •  
    •  
    •  
    •  
    •  
    •  
    •  
    •  
Subscribe
Turn what you know into an opportunity and reach millions around the world.
Learn More
Your cart is empty.
Keep shopping
Sediment Transport Modeling using HEC-RAS 1D
Rating: 3.5 out of 5(19 ratings)
138 students

Sediment Transport Modeling using HEC-RAS 1D

River Engineering
Created byAsghar Azizian
Last updated 7/2022
English

What you'll learn

  • You will learn how to extract river geometry based on DEM using RAS Mapper in HEC-RAS
  • You will learn All about the Theoretical Concepts of Sediment Transport Modeling in HEC-RAS 1D
  • You will learn How to Simulate Sediment Transport Process for a River Reach in HEC-RAS
  • You will learn How to Define Different Sediment related Settings and Parameters
  • You will learn How to Create different Temporal and Spatial outputs related to Sediment Transport Process

Course content

1 section • 8 lectures • 4h 12m total length

  • Defining Quasi-Unsteady Flow data and Boundary Conditions27:57

    In this part, you will learn more about the Quasi-Unsteady flow concept, defining Boundary conditions at External cross-sections and setting temperature time-series in HEC-RAS model. 

  • Defining Sediment Datasets in HEC-RAS26:24

    In this part, you will learn details of sediment transport functions, fall velocity formulas, defining bed gradation curves, defining movable bed limits, and sediment control volume. All sediment concepts are described completely in this video.

  • Defining Sediment Boundary Conditions38:04

    In this part, you will learn about different sediment boundary condition types including Rating Curve, Sediment Load Series, Equilibrium Load, and defining Sediment Split Approach at Junctions. In Addition, the details of Sediment Properties Options such as User Defined Grain Classes, Set Cohesive Options, Bed Change Options, and Calibrate Transport Functions are described completely. After watching this video you can be aware of all modeling tips for sediment transport using HEC-RAS.

  • Sediment Properties Options and Output Levels39:16

    In this part, you will learn about the remaining Sediment Properties Options such as Bed Mixing Options, Subsidence, and Set Path Through Nodes completely. HEC-RAS includes several settings and model coefficients such as Sediment Computation Options and Tolerances, Transport Energy Slope, and Sediment Output Options which affect the model run time and Volume of outputs. All of these options are illustrated completely in this video.

  • Running Model and Visualizing the Outputs42:34

    In this part, you will learn How to Run the model and all about different ways for creating sediment outputs

  • Mini Book: Sediment Transport Simulation using HEC-RAS 1D Model8:52

    In this mini-book, the details of sediment transport modeling in HEC-RAS are described completely with different examples and case studies. After finishing this mini-book, the user can easily simulate the sediment transport process for each real case study and project.

  • Extract River Geometry based on Remotely Sensed DEMs-Part130:37

    In this part, you will learn how to download Global and Regional DEM Sources such as SRTM-30m, ALOS-30m, ASTER-30m, GMRT450m, Copernicus Global Digital Elevation Models, and USGS 1, 10, and 30m resolution DEMs for your case studies. Then, the required preprocessing steps including projection conversion and extract DEM for study areas are illustrated in GIS.

  • Extract River Geometry based on Remotely Sensed DEMs-Part238:39

    In this part, you will learn how to Import pre-processed DEM (Terrain Model) into RS Mapper, digit stream center line, banks, flow paths and generate Cross-Sections. Then, the modeling (defining flow data and boundary conditions) and Visualization processes are described step by step.

Requirements

  • This course assumes no prior knowledge of Sediment Transport Simulation and River Engineering Concepts and is presented from a practical point of view by a professional modeler.

Description

All rivers conveying water contain sediment particles in any of the three forms: bed load, suspended load, and wash load. Natural and human factors trigger rivers to undergo severe deposition and erosion of beds or banks (Joshi et al. 2019). The long-term effects of erosion and sedimentation cause changes in river geomorphological regime. The sediment transport process in rivers depends on several factors including sediment particle size, catchment characteristics (area, basin slope, river slope, and channel width), catchment’s land cover, climate changes effects and flood events.

To simulate the realistic hydraulic and sedimentation phenomena, several numerical models have been developed over the past decades. Among them, 1D numerical models are still successfully used for long river reaches due to simple computations, small amount of required input datasets, and short computation time (Werner, 2001; Horritt and Bates, 2002; Panin and Jipa, 2002). Due to the high capability of the HEC-RAS 1D model for hydraulic simulation and analyzing the sediment transport process, several companies, engineers, and researchers, all around the world, are using the HEC-RAS 1D model in different projects. Sediment computations in HEC-RAS utilize one-dimensional, cross-section averaged, hydraulic properties from RAS’s hydraulic engines to compute sediment transport rates and update the channel geometry based on sediment continuity calculations.

An HEC-RAS sediment model requires a geometry file (in 1D case we need cross-sections), a flow file (quasi-unsteady or unsteady flow hydrograph), a sediment data file (including bed gradation, transport function, fall velocity, Sorting method, and boundary conditions), and a sediment analysis plan file. In this applied course, the details of sediment transport modeling in HEC-RAS are described completely with a applied examples. After finishing this course, the user can easily simulate the sediment transport process for each real case study and project.

Who this course is for:

  • For River Engineering Experts, and Students of Water Resources Engineering
  • For under grade or Grade students who want to improve their skills in River Engineering Studies
  • For Consultants or professionals interested in Sediment Transport Simulation

Report abuse