I was always told that a lake was a body of water supplyed by another water source such as a creek. A pond is something formed to catch runoff.
I like that definition. My pond is fed by South Moco Creek. Ha, I have a Lake!!!!
JHAP ~~~~~~~~~~ "My mind is a raging torrent, flooded with rivulets of thought cascading into a waterfall of creative alternatives." ...Hedley Lamarr (that's Hedley not Hedy)