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Figure S1 Drawing of the experimental apparatus that shows the erosion box filled by silica paste and the moveable bottom used to simulate uplift. The erosion box is located within a rainfall simulator where four sprinklers deliver a high-pressure water-air mixture. Figure S2 Detailed picture of the erosion box at the end of an experiment. The uplifted landscape is surrounded by a piedmont that formed by the aggradation of the products of erosion. Lower left corner: detailed picture of a sprinkler. Figure S3 Perturbation of a Steady State topography by piedmont deposition. Photos of the experiment and evolution of its: mean elevation (<h>), mean fan apex elevation (<h>f), mean denudation (D), relative uplift rate (Ur) and uplift rate (U). The piedmont sedimentation that starts to surround the uplifted topography (photo and point ?D?) induces the onset of the mean elevation growth and then the disruption of the previous macroscale equilibrium. At the local scale, the inhibition of erosion goes with a modification of the local relief. A smoothing of the upraising topography starts downstream and it propagates upwards. Figure S4 Perturbation of a Steady State topography by piedmont deposition. DEMs movie of the experiment and evolution of its: mean elevation (<h>; blue squares), mean fan apex elevation (<h>f; yellow circles), mean denudation (D; green triangles), relative uplift rate (Ur; red circles) and uplift rate (U).

FilenameFormatSizeDescription
TER746_Figure+S1.eps1006KSupporting info item
TER746_Figure+S2.tif4429KSupporting info item
TER746_Figure+S3.tif6294KSupporting info item
TER746_Figure+S4.gif591KSupporting info item

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