Quote Originally Posted by sskasser View Post
Still not a perfectly localized description, but the next-to-last diagram and related description give a pretty good idea of what's happening:

"One specific case happens when the surface- flowing stream to which the spring discharges is in flood from a storm in its headwaters, but not in the spring's watershed. The flooded stream blocks discharge from the spring, and in some conditions can actually reverse flow into the spring mouth and into the conduits"

http://www.uky.edu/KGS/water/general...e_flooding.htm
They have springs in KY?