Hazardous interferences between certain rivers and their selected affluents interpreted by consequences of catastrophes theory

It seems opportune to discuss certain evolutions of Complex Systems caused by effects attributable to interactions related to anthropic consequences produced by modifying their environmental contexts. The following discussions will take into account a number of considerations suggested by the Theory of Catastrophes, which to focus one's attention on sudden energy falls during the evolutions of those Systems, controlled by suitable Control Factors. See Figure 1, also for the following, that shows a particular configuration qualitatively representing an example of the topological surface describing potential energy U as controlled by two Control Factors. Actually, it has to be remembered that the surfaces representing Potential Energies are not quantitatively meaningful, as they are topological entities. Anyway, the approach this Theory suggests is so impressive, that it looks worthwhile to discuss it by quoting a number of actual situations, concerning major rivers and one of their affluents.