Book contents
- River Dynamics
- Reviews
- River Dynamics
- Copyright page
- Contents
- Preface
- Chapter 1 Introduction
- Chapter 2 The Dynamics of Drainage Basins and Stream Networks
- Chapter 3 Sediment Dynamics at Global and Drainage-Basin Scales
- Chapter 4 Flow Dynamics in Rivers
- Chapter 5 Sediment Transport Dynamics in Rivers
- Chapter 6 Magnitude-Frequency Concepts and the Dynamics of Channel-Forming Events
- Chapter 7 The Shaping of Channel Geometry
- Chapter 8 Channel Planform – Controls on Development and Change
- Chapter 9 The Dynamics of Meandering Rivers
- Chapter 10 The Dynamics of Braided Rivers
- Chapter 11 The Dynamics of Anabranching Rivers
- Chapter 12 The Dynamics of River Confluences
- Chapter 13 The Vertical Dimension of Rivers: Longitudinal Profiles, Profile Adjustments, and Step-Pool Morphology
- Chapter 14 The Dynamics of Floodplains
- Chapter 15 Human Impacts on River Dynamics
- Chapter 16 River Dynamics and Management
- Book part
- Symbols
- References
- Index
- Plate Section (PDF Only)
Chapter 7 - The Shaping of Channel Geometry
Published online by Cambridge University Press: 30 April 2020
- River Dynamics
- Reviews
- River Dynamics
- Copyright page
- Contents
- Preface
- Chapter 1 Introduction
- Chapter 2 The Dynamics of Drainage Basins and Stream Networks
- Chapter 3 Sediment Dynamics at Global and Drainage-Basin Scales
- Chapter 4 Flow Dynamics in Rivers
- Chapter 5 Sediment Transport Dynamics in Rivers
- Chapter 6 Magnitude-Frequency Concepts and the Dynamics of Channel-Forming Events
- Chapter 7 The Shaping of Channel Geometry
- Chapter 8 Channel Planform – Controls on Development and Change
- Chapter 9 The Dynamics of Meandering Rivers
- Chapter 10 The Dynamics of Braided Rivers
- Chapter 11 The Dynamics of Anabranching Rivers
- Chapter 12 The Dynamics of River Confluences
- Chapter 13 The Vertical Dimension of Rivers: Longitudinal Profiles, Profile Adjustments, and Step-Pool Morphology
- Chapter 14 The Dynamics of Floodplains
- Chapter 15 Human Impacts on River Dynamics
- Chapter 16 River Dynamics and Management
- Book part
- Symbols
- References
- Index
- Plate Section (PDF Only)
Summary
This chapter focuses on how flow in rivers shapes channel geometry, particularly the width and depth of river channels. It first examines the concepts of at-a-station and downstream hydraulic geometry, which relate width, depth, and velocity of flow to discharge. At-a-station hydraulic geometry largely reflects the influence of channel form on flow, whereas downstream hydraulic geometry reflects changes in channel geometry to accommodate downstream increases in discharge. A distinction is made between hydraulic geometry and channel geometry, where channel-geometry relations are not restricted by flow continuity constraints. Classic hydraulic- and channel-geometry analyses are based mainly on statistical analysis of empirical data. By contrast, rational regime theory uses optimization algorithms along with physical reasoning to examine relations among flow, sediment transport, bank stability, and channel geometry. The final section of the chapter explores approaches to channel geometry that consider dynamic change in geometry over time.
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- Information
- River DynamicsGeomorphology to Support Management, pp. 164 - 185Publisher: Cambridge University PressPrint publication year: 2020