Which mechanism dictates stream incision rates along orogenic belts during tectonic uplift?

💡 Explanation

When tectonic uplift increases stream elevation, heightened stream power (discharge x slope) facilitates vertical incision because the erosive force overcomes rock resistance accelerating canyon/valley formation. Stream power dictates downcutting rates, rather than rebound, weathering, or large-scale base level changes which apply over longer timescales.

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