The Geomorphic Response of Rivers to Dams: Geology is Destiny: Goemorphic and Geologic Controls on Channel Response to Floods and Dams

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Presenter: Gordon Grant
Length: 4 Parts

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

       Topics:

       Part 1

• Introduction
• Issue FERC Relicensing
• Deschutes River Studies: a meandering journey
• Deschutes Quote
• Shaded Relief - North Western Oregon
• A Closer Look
• What you would see - Picture
• What you would see - Picture 2
• Basin Morphology and Process
• Deschutes River Geomorphology
• Little Change in Hydrologic Regime
• Stable Hydrologic Regime and Muted Hydrologic Response

       Part 2

• Heidi Fassnacht
• The First Forray
• Hydraulic Cross-Section Modeling
• How Often is Bedload Transported
• 10 Year Record of the Hydrograph
• Calculated Critical Discharges
• 8-15 Bedload Transport Events in 80 Years
• Discharge Charts from Pre-Dam and Post Dam Times
• 3 Charts Showing Different Qs and Depths
• Discharge and Change Plot Chart
• Deschutes River Near Madras Thalweg Elevation
• Pre-Dam and Post-Dam Scatter Plot Chart
• Biogenic Dunes Air Photo
• Biogeneic Dunes 1995 Air Photo

       Part 3

• Heidi Fassnacht
• The First Forray
• Hydraulic Cross-Section Modeling
• How Often is Bedload Transported
• 10 Year Record of the Hydrograph
• Calculated Critical Discharges
• 8-15 Bedload Transport Events in 80 Years
• Discharge Charts from Pre-Dam and Post Dam Times
• 3 Charts Showing Different Qs and Depths
• Discharge and Change Plot Chart
• Deschutes River Near Madras Thalweg Elevation
• Pre-Dam and Post-Dam Scatter Plot Chart
• Biogenic Dunes Air Photo
• Biogeneic Dunes 1995 Air Photo

       Part 4

• Floods...sources-size-age-and effects
• The Outhouse Flood
• The Outhouse Flood cont...
• Harris and Doe Island
• Harris Island Cross Section Aerial Photo
• Harris Island Cross Section 7 Graph
• floods...sources-size-age-effectsKey Geomorphic Processes- Events- and Consequences
• Frequency of Formative Processes on Rivers and Streams
• Active Volcanic- Tectonic- and Glaciologic Environment
• Two Deschutes Basin Maps
• Sediment Production Index Deriviation
• Graph
• Sediment Delivery and Production Chart
• Sediment Yield and Contributing Drainage Area Chart
• Lower Deschutes River Sediment Budget
• Very Little Modern Sediment Production from Vast Areas of the Basin
• Results
• Take Home Messages

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