The open channel flow equation called Manning equation is Wh

The open channel flow equation called Manning equation is: Where Q = flow (m^3/s), S = slope (m/m), H = depth (m), and n = the Manning roughness coefficient. Rearrange Equation (2) to obtain a fixed-point iteration scherne to solve this equation for H given Q = 5, S = 0.0002, B = 20, and n = 0.03. Perform the computation until the absolute error a s less than or equal to 0.002%.

Solution

Given:

then   Q=

   QnB       

   H5/3=Qn(B+2H)2/3/S1/2B5/3

from Values substion:

     H³=2.24

       

             

                      =[5*0.03(20+2