Galactic gas outflows are driven by stellar feedback with dominant contribution from supernovae ( SN ) explosions . The question of whether the energy deposited by SNe initiates a large scale outflow or gas circulation on smaller scales – between discs and intermediate haloes , depends on SN rate and their distribution in space and time . We consider here gas circulation by disc-wide unclustered SNe with galactic star formation rate in the range from \simeq 6 \times 10 ^ { -4 } to \simeq 6 \times 10 ^ { -2 } ~ { } M _ { \odot } yr ^ { -1 } kpc ^ { -2 } , corresponding to mid-to-high star formation observed in galaxies . We show that such disc-wide SN explosion regime can form circulation of warm ( T \sim 10 ^ { 4 } K ) and cold ( T < 10 ^ { 3 } K ) phases within a few gas scale heights , and elevation of hot ( T > 10 ^ { 5 } K ) gas at higher ( z > 1 kpc ) heights . We found that the threshold energy input rate for hot gas outflows with disc-wide supernovae explosions is estimated to be of the order \sim 4 \times 10 ^ { -4 } erg s ^ { -1 } cm ^ { -2 } . We discuss the observational manifestations of such phenomena in optical and X-ray bands . In particular , we found that for face-on galaxies with SF ( \Sigma _ { { } _ { SF } } > 0.02 ~ { } M _ { \odot } yr ^ { -1 } kpc ^ { -2 } ) , the line profiles of ions typical for warm gas show a double-peak shape , corresponding to out-of-plane outflows . In the X-ray bands , galaxies with high SF rates ( \Sigma _ { { } _ { SF } } > 0.006 ~ { } M _ { \odot } yr ^ { -1 } kpc ^ { -2 } ) can be bright , with a smooth surface brightness in low-energy bands ( 0.1 \hbox { - - } 0.3 keV ) and patchy at higher energies ( 1.6 \hbox { - - } 8.3 keV ) .