The Geomorphic Response of Rivers to Dams: Geomorphic Effects of Dams on Rivers: A tutorial

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Presenter: Gordon Grant
Length: 5 Parts

View: Part 1 | Part 2 | Part 3 | Part 4 | Part 5

       Topics:

       Part 1

• Introduction
• Altered Flow and Sediment Regimes
• Channel and Reach Scale
• Channel and Reach Scale- Hydrologic Regime
• Evaluating altered flow regimes
• Water Year Graph
• Pre-Dam Post-Dam Chart
• Median Annual Hydrographs
• Glen Canyon Dam Hydrograph
• Deschutes River Near Madras

      Part 2

• Peak Discharge Graph
• Q and Time Graph
• Applied Stress Graph
• Applied Stress Graph- Threshold
• SAND System
• GRAVEL System

       Part 3

• Sediment Transport Regime
• Evaluating altered sediment regimes
• Sediment Trapping
• A Few Discharge and Sediment Graphs
• Capacity- Inflow Ratio

        Part 4

• Types of downstream channel response
• Types of downstream channel response cont...
• Textural coarsening
• Years After Dam Closure- Graphs
• Incision / bed degradation
• Channel Types

        Part 5

• Distance Downstream from Dam Graph
• Years After Closure Graph
• Years After Closure More Graphs
• Channel Narrowing
• Lodore Canyon- Green River
• Channel Width Change Over Time
• Years After Dam Closure Graphs
• Years After Closure More Graphs
• Other Examples of Channel Response
• Loss of Secondary Channel- Simplification
• Large decrease in eddy sand bars
• Stabilization of alluvial fans
• Lodore Canyon- Green River
• How do we bring hydrologic and sediment transport effects together?

These presentations were produced by Michael J. Furniss and Jeff Guntle, of the US Forest Service, PNW and PSW Research Stations.
US Forest Service, Pacific Northwest Research Station, Pacific Southwest Research Station, Stream Systems Technology Center