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← GeographyWhich mechanism causes stream channel incision when tectonic uplift increases land slope?
A)Increased sediment deposition rates
B)Reduced flow turbulence intensity
C)Enhanced stream power and erosion✓
D)Decreased base level accommodation space
💡 Explanation
When tectonic uplift increases land slope, stream power and bed shear stress increases because gravitational potential energy is converted into kinetic energy for erosion. Therefore, enhanced stream power and erosion cause channel incision, rather than increased deposition, reduced turbulence, or decreased accommodation space which have opposing effects.
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