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Geography

Which outcome results when the carrying capacity of an alluvial river suddenly decreases near a rapidly constructed highway embankment?

A)Increased sediment deposition upstream
B)Decreased channel sinuosity downstream
C)Enhanced rates of bank erosion
D)Lower dissolved oxygen concentrations

💡 Explanation

Increased sediment deposition upstream occurs due to decreased flow because reduced velocity lowers the river's capacity to transport sediment; therefore the sediment load is dropped, building up alluvial islands rather than eroding the channel.

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