The best method for measuring the velocity of flow in rivers is

This question was previously asked in
UKPSC JE Civil 2013 Official Paper II
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  1. Pilot tube method
  2. Surface float method
  3. Velocity rod method
  4. Current meter method

Answer (Detailed Solution Below)

Option 4 : Current meter method
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Detailed Solution

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Explanation:

current meter:

  • For measuring discharge or velocity of a streamflow current meter is used. 
  • In this, the stream channel cross-section is divided into numerous vertical subsections. 
  • In each subsection, the area is obtained by measuring the width and depth of the subsection, and the water velocity is determined using a current meter. The discharge in each subsection is computed by multiplying the subsection area by the measured velocity. The total discharge is then computed by summing the discharge of each subsection.

F1 Abhishek M Anil 16.03.21 D3

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