River Basin Erosion Dynamics

Controls of erosion in basin 35 Base level fall is primary control on long- and short-term erosion Slope steepness determines long-term erosion rate Erosion rates increase after channels steepen and hillslopes respond Footwall Relict Adjusting N. Arm S. Arm D 70 - Anomalous 60 50 40 Normalized 10Be concentration (108 atoms/g) IN WAS Erosion Index 30 20 10 0 0 50 100 150 200 250 Erosion Rate (mm/kyr) E 2.0 Anomalous 7.55 1.8 1.6 1.4 1.2 1.0 0.8 0.6 0.4 0.2- 0.0 10 15 20 25 Mean Basin Slope (°)

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