505
1 BACKGROUND
OfficiallyinauguratedonFebruary2nd,1892,Santos
Port is the most important port in Latin America,
beingresponsiblefor25%oftheBrazilianbalanceof
trade.Onceitislocatedinanestuarinearea,naturally
deep,thefirstcapitaldredgingwasperformedonlyin
1964,72yearsafter
theportinauguration.Inthistime,
itwasintendedtoestablishadesigndepthof14.8m
(CD) in the access channel. However, the design
depth was never reached, due to the inefficiency of
dredging proceedings, and the access channel depth
wasmaintainedinabout12.5m(CD).
In 2010,
another capital dredging was made in
SantosPort,inordertodeepentheaccesschanneltoa
designdepthof15m(CD).Oncemore,againdueto
the inefficiency of dredging procedures, the design
depth was never reached. In July 2017, it was
established a maximum operational draft in Santos
Port of 12.6 m, after depths lower than 14 m were
observedinbathymetricsurveys.
Considering an expected enlargement of
commercial vessels all around the world, associated
withtheroleofhubportcurrentlyplayedbythePort
ofSantos,itisindispensabletodeepenandmaintain
design depths. In
this context, the main goal of this
studyistoanalyzesedimentdepositioninSantosPort
Access Channel and predict annual maintenance
dredging volumes, considering current bathymetric
survey and design depths of 15, 16 and 17 m (CD),
based on a numerical hydrodynamic and
morphologicalmodel.
Dredging Volumes Prediction for the Access Channel of
Santos Port Considering Different Design Depths
L.M.Pion
HydraulicTechnologicalCenterFoundation,SaoPaulo,Brazil
J
.C.M.Bernardino
UniversityofSaoPaulo,SaoPaulo,Brazil
ABSTRACT:SantosisthemostimportantBrazilianport,handlingabout114millionoftonsin2016.In2010,
therewasagreatcapitaldredginginordertodeepentheAccessChannelto15mdeep(ChartDatum‐CD).This
depthwasnotachieved, due to
inefficiency ondredging procedures.As deepeningand maintaining design
depthsareindispensable,thisstudypresentsananalysisofsedimentdepositioninSantosPortAccessChannel
andanannualdredgingvolumesprediction,consideringcurrentbathymetricsurveyanddesigndepthsof15,
16and17m(CD).Anumericalhydrodynamicandmorphologicalmodel
wasdevelopedfortheinterestarea,by
usingDelft3D®,calibratedwithwaves,currentsandwaterleveldatamea s uredwithinSantosPortadjacencies.
Sedimenttransportmodelwascalibratedwithsuspendedsedimentdataandhistoricseriesofdredgedvolumes
fromSantosPortAccessChannel.Twodifferentscenariosweresimulatedforeachdesign
depth,accordingto
theregionalenvironmentalcharacteristics.Forcurrentbathymetricscenario,themodelestimatesthatitwould
benecessarytodredgeanannualaverageofabout4,325,000fromSantosPortaccesschanneltomaintain
currentdepthcondition.Regardingdesigndepthsof15,16,17meters,itwouldbe
anincreaseof15%,55%,
and80%.
http://www.transnav.eu
the International Journal
on Marine Navigation
and Safety of Sea Transportation
Volume 12
Number 3
September 2018
DOI:10.12716/1001.12.03.09