The importance of hydraulic, geomorphological and hydrodynamic conditions in rivers on watershed management cannot be overstated. However, in developing countries, sometimes the infrastructure is poor and these conditions are not managed properly. Therefore, this paper proposes a methodology to calculate flow, slope, Chezy's C, Manning's n and hydrodynamic conditions in rivers with a tracer. This methodology allows the calculation of these hydraulic and hydrodynamic characteristics for rivers that have velocity from 0.108 m/s to 1.93 m/s.