A determined individual could concievably walk from All-Star Sports or Coronado Springs to Blizzard Beach. Beware however, that it would be a longwalk, and both of those resorts are themselves rather spread out, so the walk could be even longer for some guests (All-Star Music and Movies are even further away than Sports). Over at Typhoon Lagoon, Old Key West is relatively close (walk from the West Side path), or perhaps Saratoga Springs if open during your time frame. No resort, however, is adjacent to any water park (except for now-shuttered River Country).
That said, I'm not so sure it's practical. Disney transportation from either water park would get you back to even the farthest WDW resort faster than anyone could walk to the closest resort. Anytime the water parks are operating the bus is always available, so (unless I'm really missing something particular to your situation) really there is no reason to need to walk.