Why Channel Steepness Might Not Always Be What You Think it to Be

Researchers are questioning how scientists define the boundary between hillslopes and river channels when analyzing landscapes. As Eos tells it, a new numerical model suggests that rapid rock uplift can extend hillslopes further than previously thought, potentially contaminating data used to measure channel steepness. This means common metrics for how rivers carve into the earth may actually be reflecting hillslope processes like debris flow instead. The findings suggest a need for a more flexible approach to identifying where a channel truly begins to ensure more accurate models of landscape evolution.

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