  We investigate the flux of supernova relic neutrinos (SRN) for several
neutrino oscillation models with parameters inferred from recent experimental
results. In the calculation, we adopt the realistic {\it time-dependent}
supernova density profile, which is very different from the static progenitor
profile owing to shock propagation. The Earth matter effect is also included
appropriately using realistic density profile of the Earth. As a result, these
two effects are found to induce the flux difference by a few % in the detection
energy range ($E_\nu > 19.3$ MeV). We also set 90% C.L. upper limit on SRN flux
for various oscillation models using the recently released observational result
by Super-Kamiokande (SK). In the near future, further reduced upper limit is
actually expected, when the current SK data are reanalyzed using some technique
to reduce background events against SRN signals. It is expected that the
reduced upper limit is sufficient to provide useful implications for neutrino
oscillation.
