206
Fig. 14.1. General map of the Bahia Blanca estuary, Argentina
G.M.E. Perillo eta!.
OCEANOGRAPHIC
TOWER
•
modified ebb delta (Cuadrado and Perillo 1997). The channel cross section
is steep on the sides, with aU-shaped bottom having a small asymmetry to
the right. Upstream of Puerto Galvan (Fig. 14.1) the channel narrows and
becomes more V-shaped with the asymmetry following the meandering
pattern headward (Gomez et al.1997).At the confluence with the Principal
Channel, the funnel-shaped mouth of tributary channels is turned seawards, due to ebb dominance (Perillo et al. 1996), and up to 25-m-deep
scour holes may develop (Ginsberg and Perillo 2000).
Most ebb deltas at the mouth of major channels have undergone changes (Gomez and Perillo 1992); however, the original delta shape and south-
Fig. 14.1. General map of the Bahia Blanca estuary, Argentina
G.M.E. Perillo eta!.
OCEANOGRAPHIC
TOWER
•
modified ebb delta (Cuadrado and Perillo 1997). The channel cross section
is steep on the sides, with aU-shaped bottom having a small asymmetry to
the right. Upstream of Puerto Galvan (Fig. 14.1) the channel narrows and
becomes more V-shaped with the asymmetry following the meandering
pattern headward (Gomez et al.1997).At the confluence with the Principal
Channel, the funnel-shaped mouth of tributary channels is turned seawards, due to ebb dominance (Perillo et al. 1996), and up to 25-m-deep
scour holes may develop (Ginsberg and Perillo 2000).
Most ebb deltas at the mouth of major channels have undergone changes (Gomez and Perillo 1992); however, the original delta shape and south-