## 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

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- Flow regime: Subcritical

### Assignment

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