Supplement 1. CHILD input files used to create the creep- and flow-dominated landscapes and Matlab scripts used to take transects.

File List creep.in (md5: 1b4b3b57ee5e6ae3ca42da675645687b)<br> overlandflow.in (md5: f0903df5945af71feee9e3baf37c8f42)<br> ridgeline.m (md5: ddad95a66fa76d6a09c69ed4515aa8b2)<br> trace_down.m (md5: 086f3205b7048e55529a1e6c9677e093)<br> trace_up.m (md5: 33b4d08b04edb9919f9ff3587cdd775b) Description creep.in is a CHILD input file used to create the creep-dominated landscape. The file was run to 5,200,025 years for the paper. overlandflow.in is a CHILD input file used to create the overland flow-dominated landscape. The file was run to 1,700,010 years for the paper. ridgeline.m is a Matlab script used to create transects from the middle of the base of the hillslope to the middle of the ridgeline. Requires the hsB toolkit (Bogaart and Guardiola 2007). trace_down.m is a Matlab script used to take transects along the path of steepest descent from the middle of the ridgeline to the base of the hillslope. Requires the hsB toolkit (Bogaart and Guardiola 2007). trace_up.m is a Matlab script used to take transects along the path of steepest ascent from the middle of the base of the hillslope to the ridgeline. Requires the hsB toolkit (Bogaart and Guardiola 2007).