You are assigned to carry out the field investigation to assess 4.0 wide earthen irrigation canal having a bed slope of 1 in 1000 and side slop of 1:2. The depth of flow of the canal was measured 0.90 m using the measuring gage. Estimate the discharge in canal using (i) Manning equation and (ii) Darcy equation. State the flow type. Explain why the discharges calculated from Manning and Darcy are not similar.