ewce09.azraftaohid.me/L4T1/EWCE 462/2026-07-09/C01 - Class notes.md

Introduction

• HEC-RAS -> hydraulic inputs
• Flow regime: river bed
• Steady and unsteady flow

Sinusoidal bed

• Rectangular
• Wdith 100 m
• Length 3750 m
• Interval 50 m
• n = 0.025
• Q = 20 cumec
• Bed profile = Amp * cos(pi() * dist/625)
• Amplitude = 0.94
• Downstream boundary = Amplitude + 0.3

• Flow regime: Subcritical

Assignment

• Objective
• Given data
• Sample calculation
• Graphs
• Profile output table
• Questions
• Follow the 7 points