Mathematics of tracer mixing in sediments: III. The theory of nonlocal mixing within sediments

Abstract

The general integro-differential model for deterministic bioturbation developed in part II is analyzed for its properties, and its solution is discussed for two special cases. Integral mixing accounts for exchanges on all scales, including the small mixing lengths normally associated with diffusion. The general nonlocal model is also specialized to account for the mixing created by vertical burrowing by organisms and subsequent downward infilling of these burrows. -from Authors