user's manual for corhyd: an internal diffuser hydraulics model - IfH

Table 6: Comparison of constructional alternatives for Ipanema diffuser
name
total head / relative
head [m]
difference in total
head to basecase [m /
%]
discharge
distribution
[%]
no scouring [m] /
[no. of ports]
(L d = 449, 180
ports)
basecase (build) 33.32 / 6.32 0 / 0 +/- 5 125 m / 50
taper 33.69 / 6.69 0.37 / 6 +/- 8 20 m / 8
taper short riser 33.92 / 6.92 0.60 / 9.5 +/- 8 20 m / 8
taper long riser 33.83 / 6.83 0.50 / 7.9 +/- 5 20 m / 8
taper long riser rosettes 33.72 / 6.42 0.4 / 6.2 +/- 8 20 m / 12
taper DBV 200 34.23 / 7.23 0.91 / 14.4 +/- 6 20 m / 12
7.2 Berazategui - Buenos Aires - Argentina
The Berazategui outfall is planned to discharge the treated effluents of a waste water
treatment plant to be constructed for the city of Buenos Aires. The sewer-system is separated
from the rainfall canalisation and is designed for an average effluent flowrate of about 25 m³/s
with a maximum peak discharge of 33.5 m³/s. The outfall starts at the pumping basin on the
onshore headworks, from where a 4500 m long feeder tunnel conveys the effluent to the 3000
m long diffuser in the disposal area (Fig. 40). The diffuser is composed of vertical risers
carrying four ports in a rosette-like arrangement (Fig. 41).
Fig. 40: Schematic view of diffuser longitudinal section of Berazategui outfall
Institut für Hydromechanik, Universität Karlsruhe 68