@article {Guizien_etal2012, title = {{Accounting for rough bed friction factors of mud beds due to biological activity in erosion experiments.}}, journal = {Journal of Hydraulic Engineering}, volume = {138}, number = {11}, year = {2012}, pages = {979{\textendash}984}, author = {Katell Guizien and Francis Orvain and Duch{\^e}ne, J C and Le Hir, P} }