recession of water—A legal expression applied to the gradual, natural, and more-or-less permanent lowering of the surface elevation of a lake, or it’s complete disappearance, when referred to what was once regarded as the normal (average) elevation, as at the date of an established survey.  See also reliction; accretion; dereliction.

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Source: NSPS “Definitions of Surveying and Related Terms“, used with permission.

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