46. Regime Channels
Regime channels are alluvial channels that reach a state of dynamic equilibrium with flowing water and sediment load. These channels adjust their geometry to minimize erosion and deposition, making them crucial in hydraulic engineering for predicting stable channel dimensions. The chapter covers various characteristics, types, theories, and applications of regime channels, underlining their importance in river and canal engineering.
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What we have learnt
- Regime channels exhibit equilibrium conditions where sediment transport balances sediment supply.
- Kennedy's and Lacey's theories provide empirical relationships essential for understanding and applying channel design.
- Modern methods enhance regime theory applications by incorporating computational models for flow and sediment transport.
Key Concepts
- -- Regime Channels
- Channels that have reached a dynamic equilibrium, adjusting their geometry to minimize erosion and deposition under changing flow and sediment conditions.
- -- Kennedy’s Theory
- An empirical theory focusing on sediment suspension by eddies, developed from observations in irrigation canals.
- -- Lacey’s Theory
- A more comprehensive approach to regime channels that incorporates silt factor and various geometric properties.
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