Illustration of a 2D estuary with continental island and offshore reef
Illustration of 2-dimensional coastline base of a closed estuary with nearshore reefs
Illustration of closed estuary base with offshore sandbars
Illustration of estuary base with channels and offshore sand drift
Illustration of estuary base with coastal embayment
Illustration of coastline base with open estuary and nearshore reef
Illustration of two-dimensional coastline base of gradient from catchment to river to nearshore and offshore reefs