Comments on 'Depth-energy and depth-force relationships in open channel flows II: Analytical findings for power-law cross sections'

摘要

The discusser would like to thank the authors for using an approximate analytical (not iterative) perturbation technique for the power-law cross sections. The work by the authors in accomplishing an explicit perturbation solution applicable to power-law cross sections is really appreciated. However, the discusser would like to introduce an easily implementable iterative procedure with exemplified convergence behaviour.rnThe proposed method by the authors is applicable for channels with power-law cross sections with exponent m ≤0.4. To be used for all encountered channels of power-law cross section the procedure should also be developed for m values between 0.4 and 1. However the calculation steps of the method are not as straightforward as mentioned by the authors, for inverting both non-dimensional specific energy and total force requires that so many equations be engaged.