This may sound like a stupid question to some who are more in the know, but someone help me to understand, because I don't live there or know really anything about the lake. How does a lake just....dry up like that? Is the water that fills it come strictly from rainfall and/or runoff or something? I guess what im asking is, aren't there springs that fill the lake, or is it that any springs that fill the lake not enough to sustain the water level vs humans drawing water from it? I guess I am used to lakes in my neck of the woods being sustained more or less by springs keeping it filled to the proper level. Also, when a lake like lake Mead or Folsum dries up as much as it does, how much damage does it do to the fish population?