[bugstruck]

I think Eddie summed it up pretty well. Area 3 is no surprise, as that looks like it's in the floodplain and bordererd on one or two sides by stream, even if it's some distance back. Area 2 is somewhat surprising until Eddie mentioned the dam leaking. Either that or the spring? in Area 1 extends through the pond and resurfaces in Area 2 downgrade. If the dam is not leaking that's the only other cause I can think of. Frankly, Areas 1 and 3 look pretty normal to me.