Tutorial HEC RAS Steady Flow Untuk Pemula | Saluran Sederhana

Introduction

This tutorial provides a beginner-friendly guide to using HEC RAS for steady flow analysis in simple channels. HEC RAS (Hydrologic Engineering Center's River Analysis System) is a powerful tool for modeling river flow and analyzing water surface profiles. This guide will take you through the essential steps to set up and run a basic steady flow simulation, making it suitable for those new to the software.

Step 1: Setting Up the Project

• Open HEC RAS: Launch the HEC RAS application on your computer.
• Create a New Project:
  • Go to the "File" menu and select "New Project."
  • Name your project and choose a saving location.
• Define the Geometry:
  • Click on the "Geometric Data" button.
  • Use the "Draw" tools to create your channel layout. You can:
    • Draw the centerline of the river.
    • Add cross-sections at regular intervals along the channel.
    • Ensure that the channel geometry accurately reflects the physical characteristics of the site.

Step 2: Input the Flow Data

• Access Flow Data:
  • Navigate to the "Flow Data" section from the main menu.
• Enter Steady Flow Information:
  • Click on "Steady Flow" and then "Add."
  • Input the name for your flow data set.
  • Specify the flow values for your simulation, which can be constant or variable depending on your study objectives.

Step 3: Setting Up Boundary Conditions

• Define Boundary Conditions:
  • Go to the "Boundary Conditions" menu.
  • Choose appropriate boundary types such as:
    • Flow boundary (for inflow conditions).
    • Stage boundary (for outflow conditions).
  • Ensure that these conditions represent realistic scenarios for your analysis.

Step 4: Running the Simulation

• Perform the Calculation:
  • Navigate to the "Run" menu and select "Steady Flow Analysis."
  • Ensure that all data is entered correctly.
  • Click on "Run" to start the simulation. Monitor the progress through the output window.

Step 5: Analyzing Results

• View Results:
  • Once the simulation is complete, access the "Results" section.
  • Review water surface profiles, flow velocities, and other relevant parameters.
• Create Plots:
  • Use the plotting tools to visualize results.
  • Generate graphs and tables for better understanding and presentation of data.

Conclusion

In this tutorial, you learned the fundamental steps to conduct a steady flow analysis using HEC RAS, from project setup to result analysis. Practice these steps with different channel geometries and flow conditions to deepen your understanding. For personalized assistance or questions, consider reaching out for a free consultation via WhatsApp. Happy modeling!