Observed kinetic energy per unit area of the atomic gas (black points) for our sample of galaxies (the errors are calculated with the uncertainty propagation rules applied to Eq. (1)). The blue area shows the thermal energy (E_th, c) of atomic gas if it is assumed to be only CNM. The red area is the turbulent energy injected by SNe (E_turb, SNe) with the efficiency η_atom, c reported on top of each panel. The green area represents the total energy (E_mod) calculated as the sum of E_th, c and E_turb, SNe (see Sect. 3.2 and Appendix B). The observed profiles are well reproduced by the theoretical energy for almost all the galaxies. The grey dotted vertical line, when present, indicates the outermost radius with measured Σ_SFR, hence the upper limit is used for larger radii.