On the Prediction of the Characteristic Times of River Meander Cutoff Sequence: Theoretical Model and Comparison With Laboratory and Field Observations

River meander dynamics inevitably interferes with a number of human activities and productive processes. Therefore, investigating the involved physical processes modeling their space-time evolution represent crucial requirement in terms sustainable river management restoration planning. In present study, deterministic integral-differential equation that governs river-bend growth death absence natural or anthropic forcing is for first time derived solved by resorting to cardinal fluid-mechanical equations such as Navier-Stokes’ Lamb-Oseen version. The related 1-D model, which accounts morphology sedimentology via migration rate its radius curvature, proves be able grasp periodic nature phenomenon. Additionally, it exhibits an overall very good agreement field pre-cutoff post-cutoff observations, well outcome ad hoc-designed laboratory experiment simulated near-cutoff conditions. Hence, may fast easy tool monitor bend hydro-geomorphological evolution, particularly when signs incipient instability suggest quantifying left routine exploitation timely plan, where needed, suitable interventions.