International Conference on Desalination, Environment
and Marine Outfall Systems
Hydrodynamic Modeling:
application of Delft3D-FLOW in
Santos Bay, São Paulo State,
Brazil
Author: Ph.D. SILENE CRISTINA BAPTISTELLI
Presented by: Prof. Dr. TOBIAS BLENINGER
May / 2014
Introduction
• Sao Paulo costal zone (Baixada Santista Region, 160km
coastline)
–
–
–
–
–
–
Most populated of Brazil
harbor activities
Cubatão Industrial Pole
tourism and leisure functions
low rates of sewage collection and treatment
Seawater is frequently unsuitable for bathing, mainly in function of
uncontrolled sewage disposals directly into streams of the region.
Study Area
• All sewage goes to WWTP than to Santos Outfall:
–
–
–
–
–
total length: 4,425 m
425 m diffuser stretch: 79 risers, diameter: 0.24 m.
Two opposed ports with diameters of 0.11 m.
depth of discharge at aprox. 9.50 m
average flow is Qm = 3.34 m3 /s and maximum project is
Qmax = 5.3 m3 /s
Initial and boundary conditions, physical and numerical parameters used
in modeling with DELFT3D
Horizontal spacing 300 m
Measurements
3/4/2002
1/4/2002
30/3/2002
27/3/2002
25/3/2002
23/3/2002
20/3/2002
18/3/2002
16/3/2002
13/3/2002
11/3/2002
9/3/2002
7/3/2002
4/3/2002
2/3/2002
28/2/2002
25/2/2002
23/2/2002
21/2/2002
19/2/2002
16/2/2002
14/2/2002
12/2/2002
9/2/2002
_7/2/2002
Intensidade (m/s)
N
10.00
9.00
8.00
7.00
6.00
5.00
4.00
3.00
2.00
1.00
0.00
C:\Documents and Settings\MARITIMA\Meus documentos\Silene\dados de campo\dados de vento_inverno2002.d
WIND
Calm
7%
Palette
1%
Above 8
6- 8
4- 6
2- 4
0.2 - 2
Below0.2
Depth 1m
Depth 5m
Depth 10m
8/14/05 19:00
8/13/05 18:00
8/12/05 17:00
8/11/05 16:00
8/10/05 15:00
8/9/05 14:00
8/8/05 13:00
8/7/05 12:00
8/6/05 11:00
8/5/05 10:00
8/4/05 9:00
8/3/05 8:00
8/2/05 7:00
8/1/05 6:00
Depth 5m
7/31/05 5:00
7/30/05 4:00
7/29/05 3:00
Depth 1m
7/28/05 2:00
7/27/05 1:00
7/26/05 0:00
7/24/05 23:00
7/23/05 22:00
7/22/05 21:00
7/21/05 20:00
7/20/05 19:00
7/19/05 18:00
7/18/05 17:00
7/17/05 16:00
7/16/05 15:00
7/15/05 14:00
7/14/05 13:00
7/13/05 12:00
7/12/05 11:00
.7/11/2005 10:00
Direction (degree)
60
40
20
0
5/3/2002
3/3/2002
1/3/2002
27/2/2002
26/2/2002
24/2/2002
22/2/2002
20/2/2002
18/2/2002
17/2/2002
15/2/2002
13/2/2002
11/2/2002
_9/2/2002
8/14/05 19:00
8/13/05 18:00
8/12/05 17:00
8/11/05 16:00
8/10/05 15:00
8/9/05 14:00
8/8/05 13:00
8/7/05 12:00
8/6/05 11:00
Elevação da Superfície (m)
0.500
135
N
Depth 10m
360
315
270
225
180
C:\Documents and Settings\MARITIMA\Meus documentos\Silene\dados de campo\dados de corrente_inverno2002.dfs0
27/3/2002
25/3/2002
23/3/2002
21/3/2002
19/3/2002
18/3/2002
16/3/2002
14/3/2002
12/3/2002
10/3/2002
8/3/2002
80
7/3/2002
CURRENTS
8/5/05 10:00
100
8/4/05 9:00
8/3/05 8:00
8/2/05 7:00
8/1/05 6:00
7/31/05 5:00
7/30/05 4:00
7/29/05 3:00
7/28/05 2:00
7/27/05 1:00
7/26/05 0:00
7/24/05 23:00
7/23/05 22:00
7/22/05 21:00
7/21/05 20:00
7/20/05 19:00
7/19/05 18:00
7/18/05 17:00
7/17/05 16:00
7/16/05 15:00
7/15/05 14:00
7/14/05 13:00
7/13/05 12:00
7/12/05 11:00
.7/11/2005 10:00
Intensity (cm/s)
TIDES AND CURRENTS
2.500
2.000
1.500
1.000
0.000
TIDE
-0.500
90
Calm
3%
45
0
Palette
2%
Above 50
40 - 50
30 - 40
20 - 30
6 - 20
Below 6
Comparison between the results extracted from the simulation data and
field measurements for surface elevation (tide).
RESULTS
Comparison
between current
data field
observations and
simulation results
with the Delft3D (Point 4) - Summer
2002 - Average
Speeds in Depth
Results Visualization - Flow of the currents of the period of
July 29 to August 8
Conclusions
• The simulations with Delft3D showed that the results
are satisfactorily in accordance with the field
measurements data, demonstrating that the
approach was appropriate for the study region.
• The forcing that determines the hydrodynamic in
Santos Bay is the tide. There are significant
differences between ebb and flood periods and
between syzygy and quadrature. Also, there are clear
differences in the magnitude and direction of the
surface currents and the currents in the other
layers in depth.
In addition....
Despite the Santos Submarine Outfall to comply with
the discharge conditions of the current legislation,
SABESP (Sanitation Company of State of São Paulo) has
been studying a proposal for improving their performance,
which assesses the increasing length of the outfall, an
attempt to identify a discharge point outside the center bay.
Current condition
Extending 1 km
Extending 2 km
Current condition
Extending 1 km
Extending 2 km
Partial results of the
study of environmental
analysis of alternative
extension of the
Santos outfall SABESP 2013
Thanks for your
attention
sbaptistelli@sabesp.com.br