Indices to assess riverscape connectivity | The river network as a graph | Generalized riverscape connectivity index | Catchment Connectvity index | Reach Connectivity Index | Node weights | Dispersal probability | Structural connectivity | Functional connectivity | Prioritization of barriers | Time-dependent connectivity | Preprocessing of input data | Preliminary steps | Input class 'igraph' object | Decorating the class 'igraph' object | Assigning network directionality | Indices calculation | Barriers prioritization calculation | References and key literature