Can high resolution 3D topographic surveys provide reliable grain size estimates in gravel bed rivers?

Can high resolution 3D topographic surveys provide reliable grain size estimates in gravel bed rivers?

Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Geomorphology - Volume 293, Part A, 15 September 2017, Pages 143-155

E. Pearson, M.W. Smith, M.J. Klaar, L.E. Brown,