Steady Flow Modelling: Water Surface profiles for Natural Rivers with a junction
- Confluence: Connecting point of multiple river
- Bifurcation: Point where a single river divides into multiple streams
Introduction
- Two additional boundary conditions (total three)
- From continuity equation: Q1 + Q2 = Q
- From energy equation: we assume water surface is at same level at confluence (of three rivers)
Objectives
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Procedure
- Change unit to US Customary
Geometry
- Manning's n = 0.025
- Copy cross-sectional data from corresponding Excel sheet
- Copy reach lengths (LOB, Channel, ROB) from corresponding Excel sheet
- Enter junction length from corresponding Excel sheet
- If at confluence, stations are displaying with overlap, reopen HEC-RAS after saving
Flow Data
- Use Excel's corresponding sheet
- Enter boundary condition of d/s (normal depth) for Padma
Steady Flow Analysis
- Use flow regime subcritical