... direction for an M2-profile, for example, the computed values of x should be negative for increasing values of h. Decreasing values of h should result also in negative values of x for an M1-profile. ... CHANNEL HYDRAULICS FOR ENGINEERS Chapter 4: NON-UNIFORM FLOW 734.1.3. Equation of non-uniform flow Fig. 4.3. Non-uniform flow Consider a non-uniform flow in an ... OPEN CHANNEL HYDRAULICS FOR ENGINEERS Chapter 4: NON-UNIFORM FLOW 86Then, the equation of gradually varied flow in finite difference form is solved for the distance step x, as...