River and Stream Flow Measurement Formula

River and Stream Flow (Discharge) measurement is very important to provide the basic data required for river or stream water quality. The total discharge for a stream can be estimated by float method with wind
and other surface effects, by die study, or by actual subsection flow measurement, depending on cost,
time, man-power, local conditions and so on. The discharge in a stream cross-section can be measured
from a sub-section by the following formula:

  If equal width w

where Q = discharge, cfs 
           w_n= nth distance from initial point 0, ft
          h_n = nth water depth, ft
          v_n = nth velocity, ft/s
Velocity y is measured by a velocity meter, of which there are several types.
The flow rate is 1559 cfs.