Fig. 2
From: Deltas: a new classification expanding Bates’s concepts
New proposed classification of deltas following Bates’s concepts of density contrast between the incoming flow and the water in the receiving basin. Three main delta fields are recognized, corresponding to hypopycnal, homopycnal and hyperpycnal. The hypopycnal delta field comprises brackish, marine and hypersaline littoral deltas. The homopycnal delta field includes homopycnal littoral deltas. Finally, the hyperpycnal delta field is integrated by hyperpycnal littoral deltas, hyperpycnal subaqueous deltas, and hyperpycnal fan deltas. ∆ρb: Differential buoyancy. R = non-dimensional density parameter. Rc = critical value for a non-dimensional density parameter. *Critical range of necessary sediment concentration to produce a hyperpycnal flow in normal-salinity marine waters