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Explain the difference between a Long Profile and a Cross Profile of a River.

User Toidiu
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Answer:

The average flow velocity of a river increases along its long profile. This makes sense; along the profile, more potential energy is converted to kinetic energy, increasing the velocity. This is only the average velocity however; a cross-section of a river shows that the velocity varies from one side to the other.

Step-by-step explanation:

User Wajih
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