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Constraining Spatial Variability in Erosion Rates.

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Presentation on theme: "Constraining Spatial Variability in Erosion Rates."— Presentation transcript:

1 Constraining Spatial Variability in Erosion Rates

2 1.Erosion Indices: -Topography (SRTM, ASTER, DTED, GTOPO30, LANDSAT) -Climate (TRMM, Rain Gages, Stage Recorders) 2.Cosmogenic Isotopes: -Point Measurements -Whole Basin Measurements

3 1.Erosion Indices: -Topography (SRTM, ASTER, DTED, GTOPO30, LANDSAT) -Climate (TRMM, Rain Gages, Stage Recorders) 2.Cosmogenic Isotopes: -Point Measurements -Whole Basin Measurements

4 Fluvial Incision ~ power (Kirby and Whipple, 2001) ~ shear stress (Lave and Avouac, 2001)

5 Fluvial Incision ~ power (Kirby and Whipple, 2001) ~ shear stress (Lave and Avouac, 2001) Need: Discharge (TRMM)

6 Fluvial Incision ~ power (Kirby and Whipple, 2001) ~ shear stress (Lave and Avouac, 2001) Need: Discharge (TRMM) River Slope (DTED (90m); ASTER (30m))

7 Fluvial Incision ~ power (Kirby and Whipple, 2001) ~ shear stress (Lave and Avouac, 2001) Need: Discharge (TRMM) River Slope (DTED (90m); ASTER (30m)) Channel Width (LANDSAT)

8 Power (watts/m^2)

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13 -Distributed Antiformal Uplift Across Knickpoint, no major fault breaks -Close Spatial Correspondence Between Zircon Helium Age and Stream Power

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16 1.Erosion Indices: -Topography (SRTM, ASTER, DTED, GTOPO30, LANDSAT) -Climate (TRMM, Rain Gages, Stage Recorders) 2.Cosmogenic Isotopes: -Point Measurements -Whole Basin Measurements

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