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Bedrock river channels are sites of primary erosion in the landscape, fixing the baselevel for all points upstream. Rivers Over Rock provides for the first time an integrated view of the characteristics and operation of this important, though hitherto neglected, class of channels. Examples are provided from several continents and cover a wide range of spatial scales from the large river basins (such as the Colorado River in the United States and the Indus River in Pakistan) down to reach scales and individual sites. Likewise the geologic timescales considered range from erosion and transportation during individual flows to accumulated effects over periods of tens of millions of years.
Preface
Keith Tinkler and Ellen Wohl vii
A Primer on Bedrock Channels
Keith Tinkler and Ellen Wohl 1
Hydraulics, Sediment Transport, and Erosional Processes
Conditions for the Entrainment of Cuboid Boulders in Bedrock Streams: An Historical Review of Literature w ith Respect to Recent Investigations
Paul Cading and Keith Tinkler 19
Beyond Power: Bedrock River Incision Process and Form
Gregory B. Hancock, Robert . Anderson, and Kelin X. Whipple 35
Modeling Considerations for Simulation of Flow in Bedrock Channels
Andrew J. Miller and Brian L. Cluer 61
Morphological Features of Bedrock Channels
Depositional Processes and Sediment Supply in Resistant-Boundary Channels: Examples from Two Case Studies
Daniel A. Cenderelli and Brian L. Cluer 105
Bedrock Channel Morphology in Relation to Erosional Processes
Ellen E. Wohl 133
The Role of Extreme Floods in Shaping Bedrock Channels
Victor I. Baker and Vishwas B. Kale 153
Channel Gradient and Longitudinal Profile
Recent Adjustments to the Long Profile of Cooksville Creek, an Urbanized Bedrock Channel in Mississauga, Ontario
Keith J. Tinkler and John Parish 167
Inland Propagation of Erosional Escarpments and River Profile Evolution Across the Southeast Australian Passive Continental Margin
Jeffrey K. Weissel and Michele A. Seidi 189
Bedrock Fluvial Incision and Longitudinal Profile Development Over Geologic Time S ales Determined by Fluvial Terraces
Frank J. Pazzaglia, Thomas W. Gardner, and Dorothy J. Merritts 207
River L ongitudinal Profiles and Bedrock Incision Models: Stream Power and the Influence of Sediment Supply
Leonard Sklar and William E. Dietrich 237
Methods of Studying Bedrock Channels
Field Studies of Bedrock Channels
Keith Tinkler and Ellen Wohl 261
Flume Experimentation and Simulation of Bedrock Channel Processes
Douglas Thompson and Ellen Wohl 279
Long Profile Development of Bedrock Channels: Interaction of Weathering, Mass Wasting, Bed Erosion, and Sediment Transport
Alan D. Howard 297