Minimum Rise for a Stream
My main pond is going to be slightly downhill from where I now plan to put
my veggie filter. The grade is noticeable but not extreme. I don't have
measurements yet, but I hope to as soon as the yard is a bit drier or
warmer. Anyway, if after excavation things are close to level, I am worried
about the stream. Is there a minimum grade difference or rise required for a
stream to look natural and flow easily?
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